Question

this are very difficult questions for my environmental biology class. These are examples from the practice homework so can anyone please help me check my answers.

-) The temperature classes of microorganisms are based on optimum temperatures of microbi A) cell wall C) cell membrane B) enzymes D) All of the above 20) Aerobic respiration, anaerobic respiration, and fermentation are all pathways of which involve the of nutrients. A) Catabolism, reduction B) Anabolism; oxidation C) Catabolism; oxidation D) Anabolism, reduction 21) Which of the following is NOT correct about the breakdown of glucose in the presence of oxygen? A) Glucose is the first electron donor. C) Glucose is partially broken down. B) Oxygen is the final electron acceptor D) Glucose is completely broken down. 22) "In the absence of oxygen, organic compounds are catabolized by bacteria through internally balanced oxidation-reduction reactions. In this process, only the organic compound serves as both electron donor and acceptor, and ATP is synthesized by substrate level phosphorylation." This is an excerpt from a journal article. What is the focus of this study? A) Aerobic respiration B) Fermentation C) Anaerobic respiration D) Respiration 23) Which reaction preceeds fermentation, aerobic respiration and anaerobic respiration? A) Glyoxylate Cycle B) Glycolysis C) Citric Acid Cycle D) Electron Transport System 24) A student wants to know why in class we did not focus on the waste products of fermenation such as lactic acid and ethanol. What is the BEST answer to that question? A) The waste products are used by fermentative microbes in complicated pathways. B) Fermentative microbes produce waste products to support the baking and fermentated beverage industries. C) From the stand point of fermentative microbes, the purpose of fermentation is ATP D) From the stand point of fermentative microbes, the purpose of fermentation is pyruvate. 25) Which of the following is NOT correct about the first electron donor? A) Electron transfer starts with the first electron donor. B) The first electron donor must be the same molecule as the final electron acceptor C) The first electron donor can be organic or inorganic. D) The first electron donor is oxidized to start electron transfer Why is it important to understand the role of the final electron acceptor? A) Oxidation must be balanced with reduction. B) Free energy is only released when redox balance is acheived C) The type of final electron acceptor determines the total ATP vield. D) All of the above

Answer 1

Question 19. The temperature classes of microorganism are based on the optimum temperature of microbial

Answer- B. Enzyme

Enzymes are biocatalyst and proteinous in nature. Protein are temperature sensitive they are degraded at high temperatures.

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