BIO250 MIDTERM EXAM[ALL ANSWERS 100% CORRECT]

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 BIO250_Saylor_V5  Unit 9: Microbial Genetics Started on Wednesday, October 13, 2021, 7:33 AM State Finished Completed on Wednesday, October 13, 2021, 8:29 AM Time taken 55 mins 36 secs Gr... ade 160.00 out of 160.00 (100%) Question 1 Correct 4.00 points out of 4.00 Flag question Question text A reducing medium contains Select one: a. sugars that can be fermented. b. extra oxygen. c. hemoglobin, vitamins, or other growth factors. d. substances that remove oxygen. e. inhibiting agents. Question 2 Correct 4.00 points out of 4.00 Flag question Question text The endosymbiotic theory has been developed to explain the emergence of ______. Select one: a. archaea b. bacteria c. prokaryotes d. eukaryotes e. viruses Question 3 Correct 4.00 points out of 4.00 Flag question Question text Which of the following is not true about enzymes? Select one: a. Enzymes are found in all cells. b. Enzymes are catalysts. c. Enzymes participate in the cell's chemical reactions. d. Enzymes can be denaturated by heat and other agents. e. Enzymes have high-energy bonds between phosphates. Question 4 Correct 4.00 points out of 4.00 Flag question Question text You have a tube of nutrient broth, in which E. coli is growing. Upon analyzing the broth chemistry, you find:  oxygen content has dropped a bit, but carbon dioxide has gone up a lot  formic, acetic, and lactic acids are present What kind of metabolism has most likely occurred? Select one: a. Fermentation b. Aerobic respiration c. Anaerobic respiration d. Photosynthesis Question 5 Correct 4.00 points out of 4.00 Flag question Question text Mediated transport of polar molecules and ions across the plasma membrane utilizes a(n) _____ carrier that binds to the substance and causes a conformational change to allow its movement across the membrane. Select one: a. protein b. lipid c. porin [Show More]

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