Microbial Metabolism problems
- 1. Which of the following nucleoside diphosphates is used most often in carbohydrate anabolism?
Options- A. Uridine diphosphate
- B. Adenosine diphosphate
- C. Guanine diphosphate
- D. Thymine diphosphate Discuss
Correct Answer: Uridine diphosphate
- 2. Assimilatory sulfate reduction involves the nucleotide __________ during the incorporation of H2S in the production of __________ .
Options- A. ATP; methionine
- B. ATP; cytosine
- C. UTP; cytosine
- D. GTP; cytosine Discuss
Correct Answer: ATP; cytosine
- 3. Most of the energy in aerobic respiration of glucose is captured by
Options- A. substrate-level phosphorylation
- B. electron transport of electrons from NADH
- C. long-chain fatty acid oxidation
- D. the enzyme formic-hydrogen lyase Discuss
Correct Answer: electron transport of electrons from NADH
- 4. Radioisotopes are frequently used in the study of cells. Assume a culture of E. coli is grown in a culture medium containing radioactive sulphur. At the end of 48 hours, it is expected to find the radioactive label located in
Options- A. DNA
- B. enzymes
- C. RNA
- D. all of these Discuss
Correct Answer: enzymes
- 5. For each glucose molecule broken down, there are______________number of reduced coenzymes to be oxidized.
Options- A. 12
- B. 8
- C. 6
- D. 4 Discuss
Correct Answer: 12
- 6. Dolichol phosphate is
Options- A. a complex lipid involved in docking vesicles with the plasma membrane
- B. the anchor on which sugars assemble before transfer to proteins
- C. a chaperone used in protein folding
- D. a product of phospholipase C activation Discuss
Correct Answer: the anchor on which sugars assemble before transfer to proteins
- 7. The major route for incorporation of ammonia (NH4+) into organic compounds is via
Options- A. reduction of pyruvate or alpha-ketoglutarate by enzymes
- B. atmospheric nitrogen fixation
- C. oxidation of pyruvate
- D. all of these Discuss
Correct Answer: reduction of pyruvate or alpha-ketoglutarate by enzymes
- 8. Incorporation of atmospheric N2to NH4+ occurs via the process of
Options- A. assimilatory nitrate reduction
- B. transamination
- C. deamination
- D. nitrogen fixation Discuss
Correct Answer: nitrogen fixation
- 9. During the carboxylation phase of the Calvin cycle, CO2 combines with
Options- A. ribulose 1,5 - bisphosphate
- B. phosphoglyceraldehyde
- C. pyruvic acid
- D. oxaloacetic acid Discuss
Correct Answer: ribulose 1,5 - bisphosphate
- 10. Phosphate regulation has been observed in the production of
Options- A. alkaloids
- B. antibiotics
- C. gibberelins
- D. all of these Discuss
Correct Answer: all of these
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