Bioa01 term 1 Practice test.pdf

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Biological Sciences
Bebhinn Treanor

BIOA01 Module 1: Cell Biology and Metabolism Practice Term Test Suggestions for writing this practice exam (and the real one): 1. Write the practice exam after you have thoroughly reviewed the material – this way it will give you an indication of your areas of weakness and allow you to focus your final studying on those topics. 2. Read the questions slowly and carefully – DON’T RUSH 3. For multiple choice questions, think about the answer to the question before reading through the options 4. Go over your answers to the practice exam with a friend before checking the real answers – this will help both you and them as you work through the right answer 5. This practice exam covers some of the material that will be on the real exam, but obviously not the same questions, so don’t just memorize the answers. Instead, think about the type of questions that could be asked when reviewing the material. I will post the answers on Wednesday. GOOD LUCK! BIOA01 Module 1: Cell Biology and Metabolism Practice Term Test 1. Which of the following is a correct sequence for the biological classification of organisms? A. genus, species, family, order, class, phylum, kingdom B. genus, species, family, order, class, kingdom, phylum C. genus, species, order, family, class, phylum, kingdom D. species, genus, order, family, class, kingdom, phylum E. species, genus, family, order, class, phylum, kingdom 2. Which structure is common to plant and animal cells? A. chloroplast B. wall made of cellulose C. central vacuole D. mitochondrion E. centriole 3. Which of the following is true for all exergonic reactions? A. The products have more total energy than the reactants. B. The reaction proceeds with a net release of free energy. C. Some reactants will be converted to products. D. A net input of energy from the surroundings is required for the reactions to proceed. E. The reactions are non-spontaneous. 4. Which of the following would likely move through the lipid bilayer of a plasma membrane most rapidly? A. CO 2 B. an amino acid C. glucose D. K+ E. starch 5. Which of the following statements describes NAD+? A. NAD+ has more chemical energy than NADH+H+. B. NAD+ is reduced to NADH+H+ during both glycolysis and the citric acid cycle. C. NAD+ is reduced by the action of hydrogenases. D. NAD+ can donate electrons for use in substrate-level phosphorylation. E. In the absence of NAD+, glycolysis can still function. 6. In what way do the membranes of a eukaryotic cell vary? A. Certain proteins are unique to each membrane. B. Phospholipids are found only in certain membranes. C. Only certain membranes of the cell are selectively permeable. D. Only certain membranes are constructed from amphipathic molecules. E. Some membranes have hydrophobic surfaces exposed to the cytoplasm, while others have hydrophilic surfaces facing the cytoplasm. 7. Members of the domains Bacteria and Archaea A. have nuclei. B. are multicellular. C. have chloroplasts. D. are prokaryotes. E. have flagella. 8. Which of the following metabolic processes can occur without a net influx of energy from some other process? A. ADP + Pi → ATP + H2O B. C6H12O6 + 6 O2 → 6 CO2 + 6 H2O C. 6 CO2 + 6 H2O → C6H12O6 + 6 O2 D. amino acids → protein E. glucose + fructose → sucrose 9. According to the fluid mosaic model of membrane structure, proteins of the membrane are mostly A. spread in a continuous layer over the inner and outer surfaces of the membrane. B. confined to the hydrophobic core of the membrane. C. embedded in a lipid bilayer. D. randomly oriented in the membrane, with no fixed inside-outside polarity. E. free to depart from the fluid membrane and dissolve in the surrounding solution. 10. Most CO f2om catabolism is released during A. glycolysis. B. lactate fermentation. C. the citric acid cycle. D. electron transport. E. oxidative phosphorylation. 11. The immediate energy source that drives ATP synthesis by ATP synthase during oxidative phosphorylation is A. the oxidation of glucose and other organic compounds. B. the flow of electrons down the electron transport chain. C. the affinity of oxygen for electrons. D. the H+ concentration gradient across the inner mitochondrial membrane. E. the transfer of phosphate to ADP. 12. Which of the following factors would tend to increase membrane fluidity? A. a greater proportion of unsaturated phospholipids B. a greater proportion of saturated phospholipids C. a lower temperature D. a relatively high protein content in the membrane E. a greater proportion of relatively large glycolipids compared with lipids having smaller molecular masses 13. What is the reducing agent (or electron donor) in the following reaction? Pyruvate + NADH + H+ → Lactate + NAD+ A. oxygen B. NADH+H+ C. NAD+ D. lactate E. pyruvate 14. Reactants capable of interacting to form products in a chemical reaction must first overcome a thermodynamic barrier known as the reaction's A. entropy. B. activation energy. C. endothermic level. D. heat content. E. free-energy content. 15. What does the chemiosmotic process in mitochondria involve? A. establishment of a proton gradient B. diffusion of electrons through the thylakoid membrane C. reduction of water to produce ATP energy D. movement of water by osmosis into the intermembrane space from the matrix E. oxidation of glucose, releasing carbon dioxide, NADH+H+, and FADH2 16. Choose the pair of terms that correctly completes this sentence: Catabolism is to anabolism as __________ is to __________. A. exergonic; spontaneous B. exergonic; endergonic C. free energy; entropy D. work; energy E. entropy; enthalpy 17. Active transport involves all of the following except the A. diffusion of solute through the lipid bilayer of a membrane. B. transport of solute against a concentration gradient. C. a specific transport protein in the membrane. D. pumping of solutes across the membrane. E. hydrolysis of ATP. 18. Which metabolic pathway is common to both fermentation and cellular respiration of a glucose molecule? A. the citric acid cycle B. the electron transport chain
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