Honors Biology Practice Questions #1. Name. 6. Seastars have a diploid number of 24 chromosomes. The haploid number would be

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1 Honors Biology Practice Questions #1 1. Donkeys have 68 chromosomes in each body cell. If a donkey cell undergoes meiosis, how many chromosomes should be in each gamete? A. 18 B. 34 C. 68 D A sperm cell from a rabbit contains 10 chromosomes. How many chromosomes does a skin cell from a rabbit contain? A. 5 B. 10 C. 20 D In humans, the fusion of an egg cell and sperm cell results in the formation of a A. Haploid cell B. Polyploidy cell C. Zygote D. Cotyledon 4. Mitosis produces cells with a number of chromosomes. A. Haploid B. Diploid C. Different D. Random 5. Meiosis can be described as A. 1 division & 4 cells B. 2 divisions & 2 cells C. 1 division & 2 cells D. 2 divisions & 4 cells Name 6. Seastars have a diploid number of 24 chromosomes. The haploid number would be A. 6 B. 12 C. 24 D The only haploid cells present in humans are A. Sperm & Cells B. Sperm & Skin C. Skin & Liver D. Egg & Sperm 8. A blood cell extracted from an unknown creature has 84 chromosomes. How many would be present in an egg cell? A. 84 B. 42 C. 168 D. Can t tell 9. After fertilization an embryo develops into a zygote through many cell divisions. If the sperm and egg each contain 8 chromosomes, how my chromosomes are contained within the zygote? A. 4 B. 8 C. 16 D The replication of DNA occurs A. during interphase B. during telophase C. during prophase of mitosis D. during prophase of meiosis

2 11. Mitosis occurs A. only in gamete cells B. in somatic cells C. only when an organism makes repairs to cells D. as part of active transport 15. The diagram below provides information about a carrot cell. 12. Which cell process occurs only in organisms that reproduce sexually? A. meiosis B. mutation C. replication D. mitosis A carrot cell contains 18 chromosomes. Which of the following diagrams illustrates the correct number of chromosomes in new cells produced by mitosis? 13. What is the correct sequence for plant cell mitosis? A. A, B, D, C B. C, B, A, D _ C. B, A, D, C D. D, C, B, A 14. Which of the following phases is the first step in mitosis? A. Anaphase B. Metaphase C. Prophase _ D. Telophase

3 Intro Biology Practice Questions #2 Use the information and the diagram below to answer Numbers 1 through 3. Part of the process of protein synthesis is shown below. The different structures in this process are numbered 1 through Structure 2 in the diagram represents a A. ribosome B. mitochondrion C. protein D. chloroplast 5. The structure of DNA was discovered in 1953 by. It was found to be a. A. Franklin & Wilkins; double helix B. Franklin & Wilkins; circular shape C. Watson & Crick; double helix D. Watson & Crick; circular shape Transcription of the DNA sequence, AAGCTGGGA would most directly result in which of the following? A. a sequence of three amino acids, linked by peptide bonds B. a DNA strand with the base sequence TTCGACCCT C. a mrna strand with the sequence TTCGACCCT D. a mrna strand with the sequence UUCGACCCU 7. A function of a DNA molecule is shown below. 2. The process shown in the diagram occurs in the A. nucleus B. cytoplasm C. vacuole D. chromosome 3. Structure 1 is produced in what part of the cell? A. vacuole B. cytoplasm C. mitochondria D. nucleus 4. Which of the following is correctly matched with its function? A. rrna contains codes to make new ribosomes B. DNA carries the amino acids to the ribosomes C. trna combines with proteins to make up ribosomes D. mrna carries genetic codes from nucleus to the ribosomes What process is represented by the diagram? A. mutation B. translation C. replication D. transcription 8. Which of these would most likely cause a mutation? A. the placement of ribosomes on the endoplasmic reticulum B. the insertion of a nucleotide into DNA C. the movement of transfer RNA out of the nucleus D. the release of messenger RNA from DNA

4 9. A base sequence is shown below. ACAGTGC How would the base sequence be coded on mrna? A. TGTCACG B. GUGACAU C. UGUCACG D. CACUGUA ATCAGCGCTGGC The above sequence of DNA is part of a gene. How many amino acids are coded for by this segment? A. 4 B. 8 C. 12 D G T A A A C A T G C A T T This segment of DNA has undergone a mutation in which three nucleotides have been deleted. A repair enzyme would replace them with A. CGT. B. GCA. C. CTG. D. GTA. A strand of mrna containing the repeating sequence AAGAAGAAGAAG could code for which of the following amino acid sequences? A. lys arg glu lys B. ser ser glu glu C. lys arg lys arg D. lys lys lys lys 11. The triplet code of bases for RNA may be represented by all of the following except A. CGT B. CGA C. CGG D. CGU 14. Which series of bases will complete this strand of DNA? A. CCTGAT B. ACTGGC C. GTAGGC D. TCAGGG 15. A segment of a DNA strand has the following bases: TAC GAT What is the complementary strand of DNA? A. UAG CAU B. TAG CAT C. ATG CTA D. AUG CUA 16. Which of the following is a DNA nucleotide? A. Ribose, adenine, phosphae B. Ribose, uracil, phosphate C. Phosphate, deoxyribose, thymine D. Phosphate, deoxyribose, adenine

5 Honors Biology Practice Questions #3 1. Bridget is homozygous for type A blood and Chris is homozygous for type B blood. What are the phenotypes of their children? A. 25% A; 25% B; 25%AB;25% O B. 50% A; 50% B C. 100% AB D: 50% A; 25% B; 25% O 6. The characteristic for curly hair (C) is dominant to the characteristic for straight hair (c). A cross between two individuals for hair type is shown in the Punnett square below. 2. In parrots, a red head and a blue head are both dominant. A heterozygote results in both blue and red feathers being present. This is called speckled. If two speckled parrots are mated, what is the probability of a speckled parrot? A. 25% B. 50% 3. A person can have either straight or bent pinky fingers. A woman who is homozygous for bent pinky fingers has children with a man who has straight pinky fingers. All of their children have bent pinky fingers. The trait for bent pinky fingers is an example of a trait that is A. dominant B. recessive C. codominant D. incompletely dominant 4. In cats, short hair (H) is dominant to long hair (h). If a cat that is heterozygous for short hair is crossed with a cat that has long hair, what is the probability the offspring from this cross will have long hair? A. 0% B. 25% C. 50% What must the genotype of the parents be to produce the results shown in the Punnett square? A. homozygous dominant x homozygous dominant B. homozygous dominant x heterozygous C. homozygous recessive x homozygous dominant D. heterozygous x heterozygous 7. A type of plant exhibits incomplete dominance. The two dominant alleles are red (R) and white (W) flowers, resulting in a pink heterozygote. If two pink flowers are crossed, what is the probability that the offspring will have pink flowers? A. 25% B. 50% 8. What is the probability that an offspring will inherit cystic fibrosis, an autosomal recessive disorder, if both parents are heterozygous? A. 0% B. 25% 5. In humans, being nerdy is a sex-linked recessive trait. If Julia is a nerd and Jorge is not a nerd, what is the probability that they will have a son who is nerdy? A. 0% B. 50%

6 9. The picture shows a segment of DNA from a cat. Which of these is most likely the kitten of this cat? A. 1 B. 2 C. 3 D What is the sex of the individual shown below in the karyotype? A. Male B. Female C. Can t tell D. Alien 12. The Human Genome Project was begun in 1988 by scientists from 13 nations as a worldwide effort to understand the sequencing of all of the DNA in the human body. What is one potential scientific benefit of this research? A. It will create communication between research centers. B. It will help to explain human cultural differences. C. It helps to classify man most accurately in the animal kingdom. D. It will help find the genes responsible for many diseases 13. In the laboratory, scientists remove the gene for insulin from human chromosomes. They insert the gene into the DNA of bacteria. This causes the bacteria to produce human insulin. The insulin is used to treat diabetes in humans. Which of these describes this process? A. recombinant DNA B. fertilization C. gene splicing D. DNA fingerprinting 14. Which of the following is an example of a genetically engineered organism? A. Seedless fruits resulting from grafting of one plant onto another B. A plant that received external DNA to produce natural insecticides C. A plant that naturally possesses medicinal properties D. A new plant variety created by cross-pollination 11. Neither Kate nor Joe have the condition shown in the pedigree above. What must be their genotypes in order for Max to have the condition? A. BB x BB B. BB x Bb C. Bb x BB D. Bb x Bb 15. What is the function of a restriction enzyme? A. To cut DNA into fragments at specific nucleotide sequences B. To restrict the making of proteins C. To kill bacteria D. To make a DNA fingerprint

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