BIOL 1121 UNIT 6 QUIZ ANSWERS AVAILABLE

BIOL 1121 UNIT 6 QUIZ ANSWERS AVAILABLE 1. Identify the statement about meiosis that is incorrect d. Two cycle of DNA replication occurs 2. In aerobic respiration carbohydrates are ultimately broken down into: b. CO2 3. Complete the following sentences: "Proto-oncogenes are regulators ofcell- cycle, whose mutation is a cause of cancer. Tumor suppressorsare regulators of cell cycle, whose mutation is a cause ofcancer." a. positive, gain-of-function, negative, loss-of-function 4. Products of glycolysis include: d. all of the above 5. A diploid organism has 8 chromosomes in G1. How many chromosomes will each of its offspring cells have after meiosis? d. 4 6. Which sequence of events leads to protein secretion? c. 7, 4, 2, 5, 1, 6, 3 7. In the presence of oxygen, all cells synthesize ATP via the process of glycolysis. Many cells also can metabolize pyruvate if oxygen is not present, via the process of: a. fermentation 8. Fill in the following equation: ATP + → ADP + d. H2O, Pi + free energy 9. Which principle states that alleles separate during gamete formation? d. principle of segregation 10. As protons flow through the , energy is released and exploited to combine ADP and inorganic phosphate to form ATP. d. ATP synthase 11. The high concentration of protons in the inner mitochondrial space relative to the mitochondrial matrix represent c. potential energy 12. Complete the following sentence: "Cyclin levels during cell cycle whereas cyclin-dependent kinase (CDK) levels . Progression through cell cycle results from the formation of complexes, within which is activated through phosphorylation." c. vary, remain constant, cyclin-CDK, CDK 13. What is the mitotic spindle made of? b. Microtubules 14. Which property of phospholipids is responsible for the formation of phospholipid bilayers? c. Phospholipids are amphiphilic 15. Which of the events listed below is not observed during mitosis? d. Crossing over 16. Which of the following molecules can pass through the plasma membrane by simple diffusion? Check all that apply. c. Fat-soluble drugs d. Dioxygen e. Fat-soluble vitamins 17. Complete the following sentence: "The interior of living cells is more than the exterior because more ions are expelled than ions are taken in by the sodium-potassium pump." d. electropositive, Na+, K+ 18. Which of the following is NOT a typical event associated with cell signaling? e. Stimulation of apoptosis 19. Two true breeding parents are crossed similar to Mendel's P generation. A tall plant is crossed with a short plant. What is the expected outcome for the F1 generation? b. all tall 20. Phenotype refers to an organism's: b. physical appearance 21. In each case where Mendel crossed true breeding plants as parents, the offspring displayed only one of the two traits seen in the parents. This observation supports which principle of genetics? c. dominance and recessiveness 22. What does a target cell require to respond to an extracellular signal molecule? d. All of the above 23. GPCRs are often referred to as seven-pass transmembrane receptors because they have: d. a polypeptide chain that crosses the lipid bilayer seven times. 24. Complete the following sentence: "A competitive inhibitor competes with substratebinding to the site, generally by also binding to this site; its eect onreaction rate becomes neglectable when the concentration of issuciently high compared to the concentration of ." c. active, substrate, inhibitor 25. Which of the following is true regarding a transmembrane receptor? b. It has both hydrophobic and hydrophilic regions and the ligand binds on thehydrophilic regions 27. When the hormone insulin is released into the bloodstream, what form of cell-to-cell signaling is being used? a. Endocrine 28. During anaphase-I of meiosis: a. Homologous chromosomes separate 29. Most ATP in eukaryotic cells is produced in the: a. mitochondria 30. Cyanide is a poison that binds to the active site of the enzyme cytochrome c andprevents its activity. Cyanide is a(n): d. Inhibitor 31. Which of the following is not a characteristic of enzymes? d. They are always active on more than one kind of substrate 32. Meiosis results in: d. all of above 33. When the hormone insulin is released into the bloodstream, what form of cell-to-cell signaling is being used? a. Endocrine 34. The high concentration of proton in the inner mitochondrial space relative to the mitochondrial matrix represent c. potential energy