Anatomy & Physiology I Self Quiz Ch 3 Pro: Manhal Chbat, MD

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1 Anatomy & Physiology I Self Quiz Ch 3 Pro: Manhal Chbat, MD 1. The barrier between a cell and its environment is the A) nucleus B) nuclear envelope C) cytoplasm D) plasma membrane E) cytosol 2. How are phospholipid molecules arranged within the lipid bilayer of the plasma membrane? A) The hydrophobic lipid tails and the hydrophilic polar phosphate heads are arranged randomly. B) The hydrophobic lipid tails are oriented toward the ECF and the ICF. C) The hydrophobic phosphate heads are oriented toward the ECF and the ICF. D) The hydrophilic lipid tails are oriented toward the ECF and the ICF. E) The hydrophilic phosphate heads are oriented toward the ECF and the ICF. 3. Which of the following plasma membrane proteins is correctly paired with its description? A) integral protein: proteins with carbohydrate groups attached to ends in the extracellular fluid B) transmembrane protein: extend from the ECF, through the lipid bilayer, and into cytosol C) glycoprotein: can be removed without disrupting membrane integrity D) A and B are correctly paired. E) A, B and C are correctly paired. 4. Which of the following is NOT a function of plasma membrane proteins? A) form ion channels B) transport molecules across the membrane C) catalyze chemical reactions D) stiffen the cell membrane E) act as cell-identity markers 5. The cell does not need to expend energy (ATP) in order to perform: A) exocytosis. B) pinocytosis.

2 C) simple diffusion. D) active transport. E) Both A and C are correct. 6. Symporters are transporters that: A) move two substances in the same direction across a membrane. B) move two substances in opposite directions across a membrane. C) can move a substance both into and out of a cell. D) move materials into the nucleus. E) move materials over the surface of a cell. 7. Marissa and Roberto are studying for their anatomy and physiology exam. They are confused about cytoplasm and cytosol. Which of the following statements best summarizes the relationship between those parts of the cell? A) The cytosol includes everything between the plasma membrane and the nucleus. B) The cytoplasm is the watery fluid inside the cell. C) The cytoplasm excludes the cytosol but includes the nucleus. D) The cytosol is primarily composed of aggregations of lipids and polysaccharides. E) The cytoplasm includes the cytosol, which is a watery fluid inside the cell. 8. Intracellular structures which have specific shapes and functions are called A) organelles B) cytoplasmic aggregates C) cytosol D) inclusion bodies E) nuclei 9. The subunits of a ribosome are produced in the: A) nucleolus. B) Golgi complex. C) centrosome. D) glycocalyx. E) endoplasmic reticulum. 10. Secretory proteins and membrane molecules are synthesized mainly by the: A) mitochondria. B) rough ER. C) centrosome. D) Golgi complex. E) nucleolus.

3 11. Which cell organelle is the site of fatty acid, phospholipid and steroid synthesis? A) Golgi complex B) Lysosome C) Mitochondria D) Rough endoplasmic reticulum E) Smooth endoplasmic reticulum. 12. The Golgi complex is most extensive in cells that: A) do not reproduce. B) have many mitochondria. C) move fluids across their surfaces. D) secrete proteins into the ECF. E) frequently change shape. 13. Toxic hydrogen peroxide resulting from oxidation reactions is broken down by an enzyme in peroxisomes called: A) ATPase B) kinesin. C) catalase. D) kinase. E) polymerase. 14. Tiny organelles that contain many kinds of proteases and are responsible for destruction of damaged or unnecessary proteins are the A) lysosomes B) proteosomes C) peroxisomes D) ribosomes E) nucleosomes 15. The genetic information is coded in DNA by A) the regular alternation of sugar and phosphate molecules. B) the structure of the proteins. C) the 3-dimensional structure of the double helix. D) the sequence of the nucleotides. E) the pentose sugars. 16. The process of transcription involves production of: A) mrna from a DNA template. B) two new DNA strands from the two original strands.

4 C) DNA from an mrna template. D) an amino acid chain from an mrna template. E) new amino acids. 17. Which of the following lists the phases of the cell cycle in the correct sequence? A) S phase, G1 phase, G2 phase, cytokinesis, S phase. B) Mitosis, cytokinesis, G1 phase, G2 phase, S phase. C) Cytokinesis, G1 phase, S phase, G2 phase, mitosis D) G1 phase, S phase, G2 phase, mitosis, cytokinesis E) G1 phase, G2 phase, mitosis, S phase, cytokinesis 18. The end result of mitosis is production of A) one cell with twice as many organelles as the parent cell. B) two cells with half as many chromosomes as the parent cell. C) sperm cells and egg cells. D) four cells with twice as much DNA as the parent cell. E). two cells identical to the parent cell. 19. Cytokinesis A) begins after the chromosomes are separated and moving in opposite directions. B) results in the division of the cytoplasm C) is followed by interphase. D) A and B are correct. E) A, B and C are correct. Use the following to answer questions Choose the answer that best matches the description or term. A) cytoplasm B) cytosol C) integral proteins D) phospholipids E) sterols 20. form bilayer that separates cell from environment 21. some act as gates, allowing ions to cross the plasma membrane 22. all cell contents between plasma membrane and nucleus

5 Use the following to answer questions Choose the answer that best matches the description or term. A) anaphase B) interphase C) metaphase D) prophase E) telophase 23. includes G1, S, G2; precedes prophase 24. chromosomes align at center of the mitotic spindle 25. usually simultaneous with cytokinesis; precedes interphase End