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- Question
O2 binding to hemoglobin results in
Options- A. 100-fold higher affinity for the last O2 bound than for the first
- B. extensive protein conformational change
- C. both (a) and (b)
- D. 100-fold lower affinity for the last O2 bound than for the first
- Correct Answer
- both (a) and (b)
- 1. The E.coli pyruvic acid dehydrogenase complex is reported to
Options- A. decatalyze the oxidation of pyruvic acid to acetyl Co A and CO2
- B. Catalyze the oxidation of pyruvic acid to acetyl Co A and CO2
- C. retard the reduction of pyruvic acid to acetyl Co A and CO2
- D. Catalyze the reduction of pyruvic acid to acetyl Co A and CO2 Discuss
- 2. A retention gap is placed between the injector and the front of the column to
Options- A. retain contaminants and prevent them from reaching the column
- B. retain the sample and release it gradually to the column
- C. prevent backflush of the injected solution
- D. all of the above Discuss
- 3. For the unfolding reaction of Protein G, ∆H° =210.6 kJ/mol, this means that
Options- A. unfolding is favored enthalpically
- B. folding is favored enthalpically
- C. the entropy is positive at all temperatures
- D. the entropy is negative at all temperatures Discuss
- 4. Theoretical plates are used to
Options- A. estimate the efficiency of a column
- B. determine the thickness of the stationary phase
- C. measure the distribution of the analyte between mobile and stationary phases
- D. None of the above Discuss
- 5. Main function of insulin hormone is to
Options- A. increase glycogen in liver
- B. decrease glycogen in liver
- C. increase blood sugar
- D. decrease blood sugar Discuss
- 6. Restriction enzymes are named for
Options- A. the person who discovered
- B. the bacterium they are derived from
- C. the viral DNA that they attack
- D. none of the above Discuss
- 7. Gluconeogenesis is the
Options- A. formation of glycogen
- B. breakdown of glucose to pyruvate
- C. breakdown of glycogen to glucose
- D. synthesis of glucose from non-carbohydrate precursors Discuss
- 8. Which of the following is carried out when cAMP functions as a second messenger?
Options- A. Acts second in importance to AMP
- B. Activates all cytosolic protein kinases
- C. Activates the cAMP-dependent protein kinase
- D. Acts outside the cell to influence cellular processes Discuss
- 9. Both DNA gel electrophoresis and SDS-PAGE of proteins are similar because
Options- A. in both cases molecules migrate to the anode
- B. both techniques rely on a constant charge to mass ratio
- C. both techniques utilize the sieving properties of gels
- D. all of the above Discuss
- 10. What process in cellular respiration is essentially the reverse of carbon fixation in photosynthesis?
Options- A. Glycolysis
- B. Citric acid cycle
- C. Oxidative phosphorylation
- D. Alcohol fermentation Discuss
More questions
Correct Answer: Catalyze the oxidation of pyruvic acid to acetyl Co A and CO2
Correct Answer: retain contaminants and prevent them from reaching the column
Correct Answer: folding is favored enthalpically
Correct Answer: estimate the efficiency of a column
Correct Answer: decrease blood sugar
Correct Answer: the bacterium they are derived from
Correct Answer: synthesis of glucose from non-carbohydrate precursors
Correct Answer: Activates the cAMP-dependent protein kinase
Correct Answer: all of the above
Correct Answer: Citric acid cycle
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