BIOS 242 MICROBIOLOGY WEEK 3 QUIZ / BIOS242 MICROBIOLOGY WEEK 3 QUIZ(LATEST)|ALL ANSWERS VERIFIED,100% CORRECT -Chamberlain College of Nursing

BIOS 242 MICROBIOLOGY WEEK 3 QUIZ / BIOS242 MICROBIOLOGY WEEK 3 QUIZ(LATEST)|ALL ANSWERS VERIFIED,100% CORRECT -Chamberlain College of NursingBIOS 242 MICROBIOLOGY WEEK 3 QUIZ Quiz 3 Microbiology Question 1 (TCO 5) Catabolic reactions may be characterized as _____. endergonic Correct! breaking large molecules into smaller molecules forming large molecules from smaller molecules photosynthetic None of the above Chapter 5, Catabolism and anabolism Question 2 (TCO 5) Enzymes known as lyases participate in _____ reactions. anabolicCorrect! catabolic both anabolic and catabolic neither anabolic nor catabolic oxidation-reduction Chapter 5, Role of Enzymes in Metabolisms Question 3 (TCO 5) During the Krebs cycle, _____. either 36 or 38 ATP molecules are synthesized, depending on whether the organism is a prokaryote or a eukaryote pyruvic acid is produced, lowering the pH of the cytoplasm Correct! electrons are transferred to NAD+ and FAD in the form of hydrogen atoms NADH and FADH2 are oxidized ribulose 5-phosphate is produced as an intermediate Chapter 5, The Krebs Cycle Question 4 (TCO 5) Anaerobic bacteria may use which of the following as final electron acceptors in respiration? OxygenCorrect! Nitrate Ethanol Methane Hydrogen sulfide Chapter 5, Electron Transport Question 5 (TCO 6) An aligned pair of homologous chromosomes is called a _____. chromatid spindleCorrect! tetrad coenocyte gamete Chapter 12, Reproduction of Eukaryotes Question 6 (TCO 6) Hyphae are associated with which of the following? Yeasts Algae Correct! Molds Protozoa Helminths Chapter 12, Fungus Question 7 (TCO 6) Lichens are composed of a symbiosis of fungi and which of the following? Green algae Cyanobacteria EuglenoidsCorrect! Cyanobacteria or green algae Euglenoids or dinoflagellates Chapter 12, Lichens Question 8 (TCO 7) Host specificity of a virus is due to _____. particular genes that it shares with the infected cell the presence of an envelope differences in size between the virus and the host cell the presence or absence of a cell wall on the host cell Correct interactions between viral and cellular surface molecules Chapter 13, Characteristics of Viruses Question 9 (TCO 7) The phenomenon of transduction is associated with which of the stages of a bacteriophage infection cycle? Attachment Assembly Release Synthesis Entry Chapter 13, Viral Replication Question 10 (TCO 7) The infectious particles of fungi have RNA genomes and lack a capsid. They are therefore similar to _____. bacteriophages enveloped viruses prions viroids lysogens Chapter 13, Other Parasitic Particles Question 11 (TCO 5) Explain why fermentation is a necessary alternative to respiration in many cells. Your Answer: Fermentation is the catabolic process that makes a 2 atoms of ATP from glucose. This process does not require an electron transport chain because it goes through glycolysis. Glycolysis turns the glucose atom into an N product of lactic acid. This process is necessary because it does not require oxygen, just like phosphorylation. As long as there is a good amount of the enzyme NAD+ to accept the electron during this process. Chapter 5 Respiration is possible only when electron transport can occur, and electron transport occurs only in the presence of a final electron acceptor such as oxygen. When the final electron acceptor is absent, the flow of electrons stops, resulting in the loss of ATP production through chemiosmosis. Unfortunately, without an electron transport chain, the cell also has no way of regenerating NAD+ to keep processes such as glycolysis going. Fermentation is a way to regenerate NAD+ in the absence of electron transport, thereby allowing the cell to continue ATP production via glycolysis, albeit at a lower level (2 ATP per molecule of glucose from glycolysis instead of 38 ATP molecules from chemiosmosis). Quiz Score: 20 out of 30