Chapter 10 Gene Expression and Regulation
|
|
|
- Barrie Craig
- 7 years ago
- Views:
Transcription
1 Chapter 10 Gene Expression and Regulation Fact 1: DNA contains information but is unable to carry out actions Fact 2: Proteins are the workhorses but contain no information Information in DNA must be linked with proteins Enzyme A THUS HOW? Substrate 1 Substrate 2 Substrate 3 Gene A Enzyme B Gene B Beadle & Tatum: Bread mold experiments (1940s) 1
2 Generally, one gene codes for one protein (polypeptide) Figure 10.1 Audesirk 2 & Byers Figure 3.6 Audesirk 2 & Byers How does information travel from DNA to ribosomes? Answer: RNA (ribonucleic acid) Structural Differences between RNA and DNA (See Table 10.1): 1) RNA is single-stranded 2) RNA has ribose sugar in backbone (DNA = deoxyribose) 3) RNA has base Uracil instead of Thymine (A U) Types of RNA: Messenger RNA (mrna) Carries code from DNA to ribosomes Ribosomal RNA (rrna) Combines with proteins to form ribosomes Transfer RNA (trna) Carries appropriate amino acids to ribosomes Figure 10.2 Audesirk 2 & Byers 2
3 Transcription DNA RNA Protein Nucleus Central Dogma of Biology: Translation Cytoplasm Figure 10.3 Audesirk 2 & Byers The Genetic Code: The Language of Life S O S Most organisms synthesize 20 unique amino acids A T G C = 4 AA TA CA GA AT TT CT GT AC TC CC GC AG TG CG GG = 16 How many possible three-base sequences (e.g., AAA) are there? Answer: 64 3
4 The Genetic Code: The Language of Life The genetic code is a triplet code: Three bases (called a codon) code for 1 amino acid More than 1 codon exists for most amino acids (see Table 10.3) START A U G Alanine Lysine Arginine Alanine G C G A A G A G G G C A STOP U A G Punctuation codons (start / stop) exist in genetic code Start = AUG Stop = UAG, UAA, UGA Transcription DNA RNA Protein Nucleus Central Dogma of Biology: Translation Cytoplasm Figure 10.3 Audesirk 2 & Byers 4
5 Transcription (DNA RNA): Promoter T A C Body GENE Termination Signal Step 1: Initiation Transcription produces a single strand of RNA that is complementary to one strand of DNA Non-coding region; protein binding sites RNA Polymerase binds to promoter region of gene Different version of RNA polymerase synthesizes each RNA type Step 2: Elongation RNA Polymerase unwinds DNA; synthesizes complementary copy Base pair rules apply except uracil replaces thymine A T C G A A A T C G C G A G G T DNA U A G C U U U A G C G C U C C A RNA Transcription: Initiation Elongation Strand which is transcribed Figure 10.4 Audesirk 2 & Byers 5
6 Transcription (DNA RNA): Promoter T A C Body GENE Termination Signal Transcription produces a single strand of RNA that is complementary to one strand of DNA Step 3: Termination RNA Polymerase reaches termination signal RNA detaches from RNA Polymerase RNA Polymerase detaches from DNA DNA zips back up Figure 10.4 Audesirk 2 & Byers Figure 10.5 Audesirk 2 & Byers Transcription (DNA RNA): Multiple RNA polymerase can transcribe a single gene at the same time The transcription of genes into RNA is selective: 1) Only certain cells transcribe certain genes Insulin (hormone) Pancreas 2) Only one strand of DNA (template strand) is copied 6
7 Transcription DNA RNA Protein Nucleus Central Dogma of Biology: Translation Cytoplasm Figure 10.3 Audesirk 2 & Byers Figure 10.2 / 10.7 Audesirk 2 & Byers Translation (RNA Protein): Step 1: mrna processed in nucleus Exons = Coding segments Introns = Non-coding segments Importance: A) Multiple proteins from single gene B) Quick / efficient protein evolution Step 2: mrna enters cytoplasm Exits nucleus via nuclear pores Composed of rrna and proteins Step 3: mrna binds to ribosome (protein factories) Composed of two (2) sub-units: Binds mrna and part of trna Large Sub-unit Binds part of trna; contains catalytic site 7
8 Translation (RNA Protein): Step 4: trna delivers first amino acid to ribosome trna contains three bases (anticodon) that form base pairs with mrna codon trna has correct amino acid attached for the mrna codon (61 unique trnas) Large Sub-unit Met Methionine U A C Amino Acid Anticodon U A C A U G A A G G C A U C U U A G Translation (RNA Protein): Step 5: Elongation of protein The next trna with proper anticodon binds to mrna Catalytic site joins amino acids together (peptide bond) Large Sub-unit Met Lys U A C U U C A U G A A G G C A U C U U A G 8
9 Translation (RNA Protein): Step 5: Elongation of protein The next trna with proper anticodon binds to mrna Catalytic site joins amino acids together (peptide bond) 1st trna leaves and ribosome moves down one spot Large Sub-unit Met Lys U A C U U C A U G A A G G C A U C U U A G Translation (RNA Protein): Step 5: Elongation of protein The next trna with proper anticodon binds to mrna Catalytic site joins amino acids together (peptide bond) 1st trna leaves and ribosome moves down one spot Large Sub-unit Met Lys Ala Cycle repeated U A C U U C C G U A U G A A G G C A U C U U A G 9
10 Translation (RNA Protein): Step 6: Termination of protein Process continues until stop codon is reached Finished protein is released from ribosome Met Lys Ala Ser A G A A U G A A G G C A U C U U A G Translation (RNA Protein): Step 6: Termination of protein Process continues until stop codon is reached Finished protein is released from ribosome Sub-units of ribosome separate from mrna Met Lys Ala Ser A G A A U G A A G G C A U C U U A G 10
11 Translation (RNA Protein): Step 6: Termination of protein Process continues until stop codon is reached Finished protein is released from ribosome Sub-units of ribosome separate from mrna Met Lys Ala Ser A U G A A G G C A U C U U A G Figure 10.9 Audesirk 2 & Byers Transcription / Translation Review: 11
12 Once Again - Mistakes Happen... Mutation: Changes in the sequence of bases in DNA Types of Mutations: 1) Point Mutation: A pair of bases is incorrectly matched T A T C T A A T A T A T Possible outcomes of a point mutation (active gene): 1) Protein is unchanged (codes for same amino acid) CTC and CTT still code for leucine 2) New protein equivalent to original protein Replace hydrophobic AA with hydrophobic AA (neutral mutation) 3) Protein structure is changed (problem causing e.g., sickle cell anemia) 4) Protein function destroyed due to stop codon insertion AAG codes of amino acid; ATG is a stop codon Once Again - Mistakes Happen... Mutation: Changes in the sequence of bases in DNA Types of Mutations: 2) Insertion Mutation: One or more nucleotide pairs are inserted into a gene T A T C A T A A T A G T A T 3) Deletion Mutation: One or more nucleotide pairs are deleted from a gene T A T T A? A T A A T? 12
13 Once Again - Mistakes Happen... Mutation: Changes in the sequence of bases in DNA Mutations provide the raw material for evolution... 13
14 Proper regulation of gene expression crucial for survival For Example: 30,000 genes in human genome Individual cells express small fraction of genes Gene expression changes over time Some genes never exptressed Regulation of Genes Occur Across Central Dogma: 1) Rate of transcription controlled: A) Regulatory proteins Assist / block binding of RNA polymerase B) Chromosome condensation (tightly packed areas) RNA polymerase can t access regions C) Chromosome inactivity (XX vs. XY chromosomes) Barr Body: Inactive X chromosome in females Random during development for which X chromosome inactivates 14
15 Proper regulation of gene expression crucial for survival For Example: 30,000 genes in human genome Individual cells express small fraction of genes Gene expression changes over time Some genes never exptressed Regulation of Genes Occur Across Central Dogma: 1) Rate of transcription controlled 2) Genes may produce different protein products 3) Rate of translation controlled (linked to mrna stability) 4) Protein requires activation modifications 5) Life span of protein controlled Figure Audesirk 2 & Byers Gene Regulation: 15
Transcription and Translation of DNA
Transcription and Translation of DNA Genotype our genetic constitution ( makeup) is determined (controlled) by the sequence of bases in its genes Phenotype determined by the proteins synthesised when genes
DNA Replication & Protein Synthesis. This isn t a baaaaaaaddd chapter!!!
DNA Replication & Protein Synthesis This isn t a baaaaaaaddd chapter!!! The Discovery of DNA s Structure Watson and Crick s discovery of DNA s structure was based on almost fifty years of research by other
Molecular Genetics. RNA, Transcription, & Protein Synthesis
Molecular Genetics RNA, Transcription, & Protein Synthesis Section 1 RNA AND TRANSCRIPTION Objectives Describe the primary functions of RNA Identify how RNA differs from DNA Describe the structure and
Protein Synthesis How Genes Become Constituent Molecules
Protein Synthesis Protein Synthesis How Genes Become Constituent Molecules Mendel and The Idea of Gene What is a Chromosome? A chromosome is a molecule of DNA 50% 50% 1. True 2. False True False Protein
a. Ribosomal RNA rrna a type ofrna that combines with proteins to form Ribosomes on which polypeptide chains of proteins are assembled
Biology 101 Chapter 14 Name: Fill-in-the-Blanks Which base follows the next in a strand of DNA is referred to. as the base (1) Sequence. The region of DNA that calls for the assembly of specific amino
PRACTICE TEST QUESTIONS
PART A: MULTIPLE CHOICE QUESTIONS PRACTICE TEST QUESTIONS DNA & PROTEIN SYNTHESIS B 1. One of the functions of DNA is to A. secrete vacuoles. B. make copies of itself. C. join amino acids to each other.
Genetic information (DNA) determines structure of proteins DNA RNA proteins cell structure 3.11 3.15 enzymes control cell chemistry ( metabolism )
Biology 1406 Exam 3 Notes Structure of DNA Ch. 10 Genetic information (DNA) determines structure of proteins DNA RNA proteins cell structure 3.11 3.15 enzymes control cell chemistry ( metabolism ) Proteins
From DNA to Protein. Proteins. Chapter 13. Prokaryotes and Eukaryotes. The Path From Genes to Proteins. All proteins consist of polypeptide chains
Proteins From DNA to Protein Chapter 13 All proteins consist of polypeptide chains A linear sequence of amino acids Each chain corresponds to the nucleotide base sequence of a gene The Path From Genes
Name Class Date. Figure 13 1. 2. Which nucleotide in Figure 13 1 indicates the nucleic acid above is RNA? a. uracil c. cytosine b. guanine d.
13 Multiple Choice RNA and Protein Synthesis Chapter Test A Write the letter that best answers the question or completes the statement on the line provided. 1. Which of the following are found in both
13.2 Ribosomes & Protein Synthesis
13.2 Ribosomes & Protein Synthesis Introduction: *A specific sequence of bases in DNA carries the directions for forming a polypeptide, a chain of amino acids (there are 20 different types of amino acid).
Coding sequence the sequence of nucleotide bases on the DNA that are transcribed into RNA which are in turn translated into protein
Assignment 3 Michele Owens Vocabulary Gene: A sequence of DNA that instructs a cell to produce a particular protein Promoter a control sequence near the start of a gene Coding sequence the sequence of
Lecture Series 7. From DNA to Protein. Genotype to Phenotype. Reading Assignments. A. Genes and the Synthesis of Polypeptides
Lecture Series 7 From DNA to Protein: Genotype to Phenotype Reading Assignments Read Chapter 7 From DNA to Protein A. Genes and the Synthesis of Polypeptides Genes are made up of DNA and are expressed
Name Date Period. 2. When a molecule of double-stranded DNA undergoes replication, it results in
DNA, RNA, Protein Synthesis Keystone 1. During the process shown above, the two strands of one DNA molecule are unwound. Then, DNA polymerases add complementary nucleotides to each strand which results
RNA & Protein Synthesis
RNA & Protein Synthesis Genes send messages to cellular machinery RNA Plays a major role in process Process has three phases (Genetic) Transcription (Genetic) Translation Protein Synthesis RNA Synthesis
Thymine = orange Adenine = dark green Guanine = purple Cytosine = yellow Uracil = brown
1 DNA Coloring - Transcription & Translation Transcription RNA, Ribonucleic Acid is very similar to DNA. RNA normally exists as a single strand (and not the double stranded double helix of DNA). It contains
From DNA to Protein
Nucleus Control center of the cell contains the genetic library encoded in the sequences of nucleotides in molecules of DNA code for the amino acid sequences of all proteins determines which specific proteins
DNA, RNA, Protein synthesis, and Mutations. Chapters 12-13.3
DNA, RNA, Protein synthesis, and Mutations Chapters 12-13.3 1A)Identify the components of DNA and explain its role in heredity. DNA s Role in heredity: Contains the genetic information of a cell that can
Structure and Function of DNA
Structure and Function of DNA DNA and RNA Structure DNA and RNA are nucleic acids. They consist of chemical units called nucleotides. The nucleotides are joined by a sugar-phosphate backbone. The four
Provincial Exam Questions. 9. Give one role of each of the following nucleic acids in the production of an enzyme.
Provincial Exam Questions Unit: Cell Biology: Protein Synthesis (B7 & B8) 2010 Jan 3. Describe the process of translation. (4 marks) 2009 Sample 8. What is the role of ribosomes in protein synthesis? A.
The Steps. 1. Transcription. 2. Transferal. 3. Translation
Protein Synthesis Protein synthesis is simply the "making of proteins." Although the term itself is easy to understand, the multiple steps that a cell in a plant or animal must go through are not. In order
Ms. Campbell Protein Synthesis Practice Questions Regents L.E.
Name Student # Ms. Campbell Protein Synthesis Practice Questions Regents L.E. 1. A sequence of three nitrogenous bases in a messenger-rna molecule is known as a 1) codon 2) gene 3) polypeptide 4) nucleotide
The sequence of bases on the mrna is a code that determines the sequence of amino acids in the polypeptide being synthesized:
Module 3F Protein Synthesis So far in this unit, we have examined: How genes are transmitted from one generation to the next Where genes are located What genes are made of How genes are replicated How
Academic Nucleic Acids and Protein Synthesis Test
Academic Nucleic Acids and Protein Synthesis Test Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. Each organism has a unique combination
2. The number of different kinds of nucleotides present in any DNA molecule is A) four B) six C) two D) three
Chem 121 Chapter 22. Nucleic Acids 1. Any given nucleotide in a nucleic acid contains A) two bases and a sugar. B) one sugar, two bases and one phosphate. C) two sugars and one phosphate. D) one sugar,
Genetics Module B, Anchor 3
Genetics Module B, Anchor 3 Key Concepts: - An individual s characteristics are determines by factors that are passed from one parental generation to the next. - During gamete formation, the alleles for
RNA and Protein Synthesis
Name lass Date RN and Protein Synthesis Information and Heredity Q: How does information fl ow from DN to RN to direct the synthesis of proteins? 13.1 What is RN? WHT I KNOW SMPLE NSWER: RN is a nucleic
Translation Study Guide
Translation Study Guide This study guide is a written version of the material you have seen presented in the replication unit. In translation, the cell uses the genetic information contained in mrna to
Specific problems. The genetic code. The genetic code. Adaptor molecules match amino acids to mrna codons
Tutorial II Gene expression: mrna translation and protein synthesis Piergiorgio Percipalle, PhD Program Control of gene transcription and RNA processing mrna translation and protein synthesis KAROLINSKA
Protein Synthesis. Page 41 Page 44 Page 47 Page 42 Page 45 Page 48 Page 43 Page 46 Page 49. Page 41. DNA RNA Protein. Vocabulary
Protein Synthesis Vocabulary Transcription Translation Translocation Chromosomal mutation Deoxyribonucleic acid Frame shift mutation Gene expression Mutation Point mutation Page 41 Page 41 Page 44 Page
To be able to describe polypeptide synthesis including transcription and splicing
Thursday 8th March COPY LO: To be able to describe polypeptide synthesis including transcription and splicing Starter Explain the difference between transcription and translation BATS Describe and explain
ISTEP+: Biology I End-of-Course Assessment Released Items and Scoring Notes
ISTEP+: Biology I End-of-Course Assessment Released Items and Scoring Notes Page 1 of 22 Introduction Indiana students enrolled in Biology I participated in the ISTEP+: Biology I Graduation Examination
Chapter 17: From Gene to Protein
AP Biology Reading Guide Fred and Theresa Holtzclaw Julia Keller 12d Chapter 17: From Gene to Protein 1. What is gene expression? Gene expression is the process by which DNA directs the synthesis of proteins
Cellular Respiration Worksheet 1. 1. What are the 3 phases of the cellular respiration process? Glycolysis, Krebs Cycle, Electron Transport Chain.
Cellular Respiration Worksheet 1 1. What are the 3 phases of the cellular respiration process? Glycolysis, Krebs Cycle, Electron Transport Chain. 2. Where in the cell does the glycolysis part of cellular
Basic Concepts of DNA, Proteins, Genes and Genomes
Basic Concepts of DNA, Proteins, Genes and Genomes Kun-Mao Chao 1,2,3 1 Graduate Institute of Biomedical Electronics and Bioinformatics 2 Department of Computer Science and Information Engineering 3 Graduate
Multiple Choice Write the letter that best answers the question or completes the statement on the line provided.
Name lass Date hapter 12 DN and RN hapter Test Multiple hoice Write the letter that best answers the question or completes the statement on the line provided. Pearson Education, Inc. ll rights reserved.
1 Mutation and Genetic Change
CHAPTER 14 1 Mutation and Genetic Change SECTION Genes in Action KEY IDEAS As you read this section, keep these questions in mind: What is the origin of genetic differences among organisms? What kinds
CCR Biology - Chapter 8 Practice Test - Summer 2012
Name: Class: Date: CCR Biology - Chapter 8 Practice Test - Summer 2012 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. What did Hershey and Chase know
Module 3 Questions. 7. Chemotaxis is an example of signal transduction. Explain, with the use of diagrams.
Module 3 Questions Section 1. Essay and Short Answers. Use diagrams wherever possible 1. With the use of a diagram, provide an overview of the general regulation strategies available to a bacterial cell.
Algorithms in Computational Biology (236522) spring 2007 Lecture #1
Algorithms in Computational Biology (236522) spring 2007 Lecture #1 Lecturer: Shlomo Moran, Taub 639, tel 4363 Office hours: Tuesday 11:00-12:00/by appointment TA: Ilan Gronau, Taub 700, tel 4894 Office
GENE REGULATION. Teacher Packet
AP * BIOLOGY GENE REGULATION Teacher Packet AP* is a trademark of the College Entrance Examination Board. The College Entrance Examination Board was not involved in the production of this material. Pictures
2006 7.012 Problem Set 3 KEY
2006 7.012 Problem Set 3 KEY Due before 5 PM on FRIDAY, October 13, 2006. Turn answers in to the box outside of 68-120. PLEASE WRITE YOUR ANSWERS ON THIS PRINTOUT. 1. Which reaction is catalyzed by each
Transcription: RNA Synthesis, Processing & Modification
Transcription: RNA Synthesis, Processing & Modification 1 Central dogma DNA RNA Protein Reverse transcription 2 Transcription The process of making RNA from DNA Produces all type of RNA mrna, trna, rrna,
Central Dogma. Lecture 10. Discussing DNA replication. DNA Replication. DNA mutation and repair. Transcription
Central Dogma transcription translation DNA RNA Protein replication Discussing DNA replication (Nucleus of eukaryote, cytoplasm of prokaryote) Recall Replication is semi-conservative and bidirectional
Name: Date: Period: DNA Unit: DNA Webquest
Name: Date: Period: DNA Unit: DNA Webquest Part 1 History, DNA Structure, DNA Replication DNA History http://www.dnaftb.org/dnaftb/1/concept/index.html Read the text and answer the following questions.
Activity 7.21 Transcription factors
Purpose To consolidate understanding of protein synthesis. To explain the role of transcription factors and hormones in switching genes on and off. Play the transcription initiation complex game Regulation
Sample Questions for Exam 3
Sample Questions for Exam 3 1. All of the following occur during prometaphase of mitosis in animal cells except a. the centrioles move toward opposite poles. b. the nucleolus can no longer be seen. c.
Translation. Translation: Assembly of polypeptides on a ribosome
Translation Translation: Assembly of polypeptides on a ribosome Living cells devote more energy to the synthesis of proteins than to any other aspect of metabolism. About a third of the dry mass of a cell
T C T G G C C G A C C T;
1. (a) Gene is a (length) of DNA; Gene is a sequence of bases/chain of nucleotides; Triplet (base) code/read in three s; On sense/coding strand; Triplet coding for amino acid; Degenerate code; non-overlapping;
TRANSCRIPTION TRANSLATION - GENETIC CODE AND OUTLINE OF PROTEIN SYNTHESIS
TRANSCRIPTION TRANSLATION - GENETIC CODE AND OUTLINE OF PROTEIN SYNTHESIS Central Dogma of Protein Synthesis Proteins constitute the major part by dry weight of an actively growing cell. They are widely
BCH401G Lecture 39 Andres
BCH401G Lecture 39 Andres Lecture Summary: Ribosome: Understand its role in translation and differences between translation in prokaryotes and eukaryotes. Translation: Understand the chemistry of this
Chapter 18 Regulation of Gene Expression
Chapter 18 Regulation of Gene Expression 18.1. Gene Regulation Is Necessary By switching genes off when they are not needed, cells can prevent resources from being wasted. There should be natural selection
BioBoot Camp Genetics
BioBoot Camp Genetics BIO.B.1.2.1 Describe how the process of DNA replication results in the transmission and/or conservation of genetic information DNA Replication is the process of DNA being copied before
MUTATION, DNA REPAIR AND CANCER
MUTATION, DNA REPAIR AND CANCER 1 Mutation A heritable change in the genetic material Essential to the continuity of life Source of variation for natural selection New mutations are more likely to be harmful
Lecture 1 MODULE 3 GENE EXPRESSION AND REGULATION OF GENE EXPRESSION. Professor Bharat Patel Office: Science 2, 2.36 Email: b.patel@griffith.edu.
Lecture 1 MODULE 3 GENE EXPRESSION AND REGULATION OF GENE EXPRESSION Professor Bharat Patel Office: Science 2, 2.36 Email: b.patel@griffith.edu.au What is Gene Expression & Gene Regulation? 1. Gene Expression
AP BIOLOGY 2009 SCORING GUIDELINES
AP BIOLOGY 2009 SCORING GUIDELINES Question 4 The flow of genetic information from DNA to protein in eukaryotic cells is called the central dogma of biology. (a) Explain the role of each of the following
Basic Principles of Transcription and Translation
The Flow of Genetic Information The information content of DNA is in the form of specific sequences of nucleotides The DNA inherited by an organism leads to specific traits by dictating the synthesis of
Control of Gene Expression
Home Gene Regulation Is Necessary? Control of Gene Expression By switching genes off when they are not needed, cells can prevent resources from being wasted. There should be natural selection favoring
Complex multicellular organisms are produced by cells that switch genes on and off during development.
Home Control of Gene Expression Gene Regulation Is Necessary? By switching genes off when they are not needed, cells can prevent resources from being wasted. There should be natural selection favoring
AP BIOLOGY 2010 SCORING GUIDELINES (Form B)
AP BIOLOGY 2010 SCORING GUIDELINES (Form B) Question 2 Certain human genetic conditions, such as sickle cell anemia, result from single base-pair mutations in DNA. (a) Explain how a single base-pair mutation
3120-1 - Page 1. Name:
Name: 1) Which series is arranged in correct order according to decreasing size of structures? A) DNA, nucleus, chromosome, nucleotide, nitrogenous base B) chromosome, nucleus, nitrogenous base, nucleotide,
Bio 102 Practice Problems Genetic Code and Mutation
Bio 102 Practice Problems Genetic Code and Mutation Multiple choice: Unless otherwise directed, circle the one best answer: 1. Beadle and Tatum mutagenized Neurospora to find strains that required arginine
Concluding lesson. Student manual. What kind of protein are you? (Basic)
Concluding lesson Student manual What kind of protein are you? (Basic) Part 1 The hereditary material of an organism is stored in a coded way on the DNA. This code consists of four different nucleotides:
Gene Models & Bed format: What they represent.
GeneModels&Bedformat:Whattheyrepresent. Gene models are hypotheses about the structure of transcripts produced by a gene. Like all models, they may be correct, partly correct, or entirely wrong. Typically,
13.4 Gene Regulation and Expression
13.4 Gene Regulation and Expression Lesson Objectives Describe gene regulation in prokaryotes. Explain how most eukaryotic genes are regulated. Relate gene regulation to development in multicellular organisms.
Proteins and Nucleic Acids
Proteins and Nucleic Acids Chapter 5 Macromolecules: Proteins Proteins Most structurally & functionally diverse group of biomolecules. : o Involved in almost everything o Enzymes o Structure (keratin,
The Nucleus: DNA, Chromatin And Chromosomes
The Nucleus: DNA, Chromatin And Chromosomes Professor Alfred Cuschieri Department of Anatomy, University of Malta. Objectives By the end of this unit the student should be able to: 1. List the major structural
DNA (genetic information in genes) RNA (copies of genes) proteins (functional molecules) directionality along the backbone 5 (phosphate) to 3 (OH)
DNA, RNA, replication, translation, and transcription Overview Recall the central dogma of biology: DNA (genetic information in genes) RNA (copies of genes) proteins (functional molecules) DNA structure
Modeling DNA Replication and Protein Synthesis
Skills Practice Lab Modeling DNA Replication and Protein Synthesis OBJECTIVES Construct and analyze a model of DNA. Use a model to simulate the process of replication. Use a model to simulate the process
Regents Biology REGENTS REVIEW: PROTEIN SYNTHESIS
Period Date REGENTS REVIEW: PROTEIN SYNTHESIS 1. The diagram at the right represents a portion of a type of organic molecule present in the cells of organisms. What will most likely happen if there is
Lecture 5. 1. Transfer of proper aminoacyl-trna from cytoplasm to A-site of ribosome.
Elongation & Termination of Protein Synthesis (5.1) Lecture 5 1. INITIATION Assembly of active ribosome by placing the first mrna codon (AUG or START codon) near the P site and pairing it with initiation
Announcements. Chapter 15. Proteins: Function. Proteins: Function. Proteins: Structure. Peptide Bonds. Lab Next Week. Help Session: Monday 6pm LSS 277
Lab Next Week Announcements Help Session: Monday 6pm LSS 277 Office Hours Chapter 15 and Translation Proteins: Function Proteins: Function Enzymes Transport Structural Components Regulation Communication
Control of Gene Expression
Control of Gene Expression What is Gene Expression? Gene expression is the process by which informa9on from a gene is used in the synthesis of a func9onal gene product. What is Gene Expression? Figure
2007 7.013 Problem Set 1 KEY
2007 7.013 Problem Set 1 KEY Due before 5 PM on FRIDAY, February 16, 2007. Turn answers in to the box outside of 68-120. PLEASE WRITE YOUR ANSWERS ON THIS PRINTOUT. 1. Where in a eukaryotic cell do you
Nucleotides and Nucleic Acids
Nucleotides and Nucleic Acids Brief History 1 1869 - Miescher Isolated nuclein from soiled bandages 1902 - Garrod Studied rare genetic disorder: Alkaptonuria; concluded that specific gene is associated
Biology Final Exam Study Guide: Semester 2
Biology Final Exam Study Guide: Semester 2 Questions 1. Scientific method: What does each of these entail? Investigation and Experimentation Problem Hypothesis Methods Results/Data Discussion/Conclusion
Lecture 26: Overview of deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) structure
Lecture 26: Overview of deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) structure Nucleic acids play an important role in the storage and expression of genetic information. They are divided into
Lab # 12: DNA and RNA
115 116 Concepts to be explored: Structure of DNA Nucleotides Amino Acids Proteins Genetic Code Mutation RNA Transcription to RNA Translation to a Protein Figure 12. 1: DNA double helix Introduction Long
CHAPTER 30: PROTEIN SYNTHESIS
CHAPTER 30: PROTEIN SYNTHESIS (Translation) Translation: mrna protein LECTURE TOPICS Complexity, stages, rate, accuracy Amino acid activation [trna charging] trnas and translating the Genetic Code - Amino
Overview of Eukaryotic Gene Prediction
Overview of Eukaryotic Gene Prediction CBB 231 / COMPSCI 261 W.H. Majoros What is DNA? Nucleus Chromosome Telomere Centromere Cell Telomere base pairs histones DNA (double helix) DNA is a Double Helix
http://www.life.umd.edu/grad/mlfsc/ DNA Bracelets
http://www.life.umd.edu/grad/mlfsc/ DNA Bracelets by Louise Brown Jasko John Anthony Campbell Jack Dennis Cassidy Michael Nickelsburg Stephen Prentis Rohm Objectives: 1) Using plastic beads, construct
Microbial Genetics (Chapter 8) Lecture Materials for Amy Warenda Czura, Ph.D. Suffolk County Community College. Eastern Campus
Microbial Genetics (Chapter 8) Lecture Materials for Amy Warenda Czura, Ph.D. Suffolk County Community College Primary Source for figures and content: Eastern Campus Tortora, G.J. Microbiology An Introduction
Replication Study Guide
Replication Study Guide This study guide is a written version of the material you have seen presented in the replication unit. Self-reproduction is a function of life that human-engineered systems have
Lecture 4. Polypeptide Synthesis Overview
Initiation of Protein Synthesis (4.1) Lecture 4 Polypeptide Synthesis Overview Polypeptide synthesis proceeds sequentially from N Terminus to C terminus. Amino acids are not pre-positioned on a template.
Genetics Test Biology I
Genetics Test Biology I Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Avery s experiments showed that bacteria are transformed by a. RNA. c. proteins.
Chem 465 Biochemistry II
Chem 465 Biochemistry II Name: 2 points Multiple choice (4 points apiece): 1. Formation of the ribosomal initiation complex for bacterial protein synthesis does not require: A) EF-Tu. B) formylmethionyl
Appendix C DNA Replication & Mitosis
K.Muma Bio 6 Appendix C DNA Replication & Mitosis Study Objectives: Appendix C: DNA replication and Mitosis 1. Describe the structure of DNA and where it is found. 2. Explain complimentary base pairing:
Just the Facts: A Basic Introduction to the Science Underlying NCBI Resources
1 of 8 11/7/2004 11:00 AM National Center for Biotechnology Information About NCBI NCBI at a Glance A Science Primer Human Genome Resources Model Organisms Guide Outreach and Education Databases and Tools
DNA and the Cell. Version 2.3. English version. ELLS European Learning Laboratory for the Life Sciences
DNA and the Cell Anastasios Koutsos Alexandra Manaia Julia Willingale-Theune Version 2.3 English version ELLS European Learning Laboratory for the Life Sciences Anastasios Koutsos, Alexandra Manaia and
Sickle cell anemia: Altered beta chain Single AA change (#6 Glu to Val) Consequence: Protein polymerizes Change in RBC shape ---> phenotypes
Protein Structure Polypeptide: Protein: Therefore: Example: Single chain of amino acids 1 or more polypeptide chains All polypeptides are proteins Some proteins contain >1 polypeptide Hemoglobin (O 2 binding
Gene Switches Teacher Information
STO-143 Gene Switches Teacher Information Summary Kit contains How do bacteria turn on and turn off genes? Students model the action of the lac operon that regulates the expression of genes essential for
mrna EDITING Watson et al., BIOLOGIA MOLECOLARE DEL GENE, Zanichelli editore S.p.A. Copyright 2005
mrna EDITING mrna EDITING http://dbb.urmc.rochester.edu/labs/smith/research_2.htm The number of A to I sites in the human transcriptome >15;000 the vast majority of these sites occurring in Alu repeats
Bio 102 Practice Problems Recombinant DNA and Biotechnology
Bio 102 Practice Problems Recombinant DNA and Biotechnology Multiple choice: Unless otherwise directed, circle the one best answer: 1. Which of the following DNA sequences could be the recognition site
Given these characteristics of life, which of the following objects is considered a living organism? W. X. Y. Z.
Cell Structure and Organization 1. All living things must possess certain characteristics. They are all composed of one or more cells. They can grow, reproduce, and pass their genes on to their offspring.
The Molecules of Cells
The Molecules of Cells I. Introduction A. Most of the world s population cannot digest milk-based foods. 1. These people are lactose intolerant because they lack the enzyme lactase. 2. This illustrates
somatic cell egg genotype gamete polar body phenotype homologous chromosome trait dominant autosome genetics recessive
CHAPTER 6 MEIOSIS AND MENDEL Vocabulary Practice somatic cell egg genotype gamete polar body phenotype homologous chromosome trait dominant autosome genetics recessive CHAPTER 6 Meiosis and Mendel sex
Answer: 2. Uracil. Answer: 2. hydrogen bonds. Adenine, Cytosine and Guanine are found in both RNA and DNA.
Answer: 2. Uracil Adenine, Cytosine and Guanine are found in both RNA and DNA. Thymine is found only in DNA; Uracil takes its (Thymine) place in RNA molecules. Answer: 2. hydrogen bonds The complementary
Review Packet- Modern Genetics
Review Packet- Modern Genetics Name 1. Base your answer to the following question on The type of molecule represented below is found in organisms. 3. The diagram below represents a structure found in most
Gene mutation and molecular medicine Chapter 15
Gene mutation and molecular medicine Chapter 15 Lecture Objectives What Are Mutations? How Are DNA Molecules and Mutations Analyzed? How Do Defective Proteins Lead to Diseases? What DNA Changes Lead to
Control of Gene Expression
Control of Gene Expression (Learning Objectives) Explain the role of gene expression is differentiation of function of cells which leads to the emergence of different tissues, organs, and organ systems