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Home ‣ Biochemistry ‣ Vitamins and Coenzymes See What Others Are Saying!
- Question
The vitamin riboflavin is part of the __________ molecule.
Options- A. ferredoxin
- B. FAD
- C. pyridoxal phosphat
- D. pyrophosphate
- Correct Answer
- FAD
- 1. Each cycle of ?-oxidation produces
Options- A. 1 FADH2, 1 NAD+, and 1 acetyl-CoA
- B. 1 FADH2, 1 NADH and 1 acetyl-CoA
- C. 1 FADH2, 1 NADH and 2 CO2 molecules
- D. 1 FAD, 1 NAD+ and 2 CO2 molecules Discuss
- 2. Immunological memory is due to
Options- A. short lived macrophage that can recognize specific pathogens
- B. long lived B cells that secrete a specific antibody
- C. long lived B cells that secrete a specific antigen
- D. short lived helper T cells that signal macrophage to divide Discuss
- 3. Why do fluorescence spectrometers often use double-beam optics?
Options- A. So a reference solution can be used
- B. To compensate for beam attenuation by the monochromator
- C. To compensate for power fluctuations in the radiation source
- D. All of the above Discuss
- 4. The best way to determine the location of protein in the purification scheme is to measure the
Options- A. rate of ATP synthesis
- B. changes in the refractive index
- C. UV absorption
- D. mass spectroscopy of the protein Discuss
- 5. Doubling the column's length increases resolution by a factor of
Options- A. (2)0.5
- B. 2
- C. 3
- D. 4 Discuss
- 6. The role of Asp 102 and His 57 during trypsin catalysis is to
Options- A. neutralize the charge on the other's side chain
- B. keep the specificity pocket open
- C. function as a proton shuttle
- D. clamp the substrate into the active site Discuss
- 7. Which of the following is a second messenger?
Options- A. lnositol 1,4,5-triphosphate
- B. Diacyl glycerol
- C. Phospholipase C
- D. Both (a) and (b) Discuss
- 8. Transcription by E. coli polymerase occurs in
Options- A. four phases known as initiation, propagation, elongation and termination
- B. three phases known as initiation, elongation and termination
- C. two phases known as initiation and termination
- D. none of the above Discuss
- 9. Upstream regions which are essential for correct transcription are called
Options- A. enhancers
- B. start codons
- C. promoters
- D. transcription factors Discuss
- 10. The products of urea cycle are
Options- A. 1 molecule of urea, 1 molecule of ammonia, 1 molecule of ATP and 1 molecule of fumaric acid
- B. 1 molecule of fumaric acid, 1 molecule of urea, 1 molecule of AMP, 2 molecules of ADP
- C. 1 molecule of aspartic acid, 1 molecule of ammonia, 1 molecule of fumaric acid, 1 molecule of ATP
- D. None of the above Discuss
More questions
Correct Answer: 1 FADH2, 1 NADH and 1 acetyl-CoA
Correct Answer: long lived B cells that secrete a specific antibody
Correct Answer: To compensate for power fluctuations in the radiation source
Correct Answer: rate of ATP synthesis
Correct Answer: (2)0.5
Correct Answer: function as a proton shuttle
Correct Answer: Both (a) and (b)
Correct Answer: three phases known as initiation, elongation and termination
Correct Answer: promoters
Correct Answer: 1 molecule of fumaric acid, 1 molecule of urea, 1 molecule of AMP, 2 molecules of ADP
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