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- Question
In an SDS-PAGE
Options- A. proteins are denatured by the SDS
- B. proteins have the same charge-to-mass ratio
- C. smaller proteins migrate more rapidly through the gel
- D. all of the above
- Correct Answer
- all of the above
- 1. For gene transfer to be effective, transforming DNA must be
Options- A. incorporated into the bacterial chromosome
- B. incorporated into a viral genome
- C. free in the bacterial cytoplasm
- D. none of the above Discuss
- 2. Glycogen has
Options- A. ?-1,4 linkage
- B. ?-1,6 linkages
- C. ?-1,4 and ?-1,6 linkages
- D. ?-1,4 and ?-1,6 linkage Discuss
- 3. The released energy obtained by oxidation of glucose is stored as
Options- A. a concentration gradient across a membrane
- B. ADP
- C. ATP
- D. NAD+ Discuss
- 4. Which of the following serves as a reactant in photosynthesis and a product in cellular respiration?
Options- A. O2
- B. CO2
- C. Sunlight
- D. ATP Discuss
- 5. 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
- 6. 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
- 7. 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
- 8. 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
- 9. Doubling the column's length increases resolution by a factor of
Options- A. (2)0.5
- B. 2
- C. 3
- D. 4 Discuss
- 10. 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
More questions
Correct Answer: incorporated into the bacterial chromosome
Correct Answer: ?-1,4 and ?-1,6 linkages
Correct Answer: ATP
Correct Answer: CO2
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
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