Carbohydrate problems
- 1. Gluconeogenesis uses
Options- A. 3 ATPs and 2 GTPs per glucose
- B. 2 ATPs and 1 GTPs per glucose
- C. 3 ATPs and 3 GTPs per glucose
- D. 4 ATPs and 2 GTPs per glucose Discuss
Correct Answer: 4 ATPs and 2 GTPs per glucose
- 2. Citric acid accumulation would
Options- A. stimulate phosphofructokinase activity
- B. stimulate fructose 1,6 diphosphatase activity
- C. inhibit phosphofructokinase activity
- D. both (b) and (c) Discuss
Correct Answer: both (b) and (c)
- 3. Hydrolysis of lactose yields
Options- A. galactose and fructose
- B. galactose and glucose
- C. glucose and fructose
- D. fructose and galactose Discuss
Correct Answer: galactose and glucose
- 4. 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
Correct Answer: Activates the cAMP-dependent protein kinase
- 5. The ultimate source of energy that sustains living systems is
Options- A. glucose
- B. oxygen
- C. sunlight
- D. carbon dioxide Discuss
Correct Answer: sunlight
- 6. a-amylose is similar to
Options- A. ?-sheets
- B. ?-turned coils
- C. ?-helices
- D. the hydrophobic core Discuss
Correct Answer: ?-helices
- 7. How many ATP equivalents per mole of glucose input are required for gluconeogenesis?
Options- A. 2
- B. 6
- C. 8
- D. 4 Discuss
Correct Answer: 6
- 8. Boat and chair conformations are found
Options- A. in pyranose sugars
- B. in any sugar without axial -OH groups
- C. in any sugar without equatorial -OH groups
- D. only in D-glucopyranose Discuss
Correct Answer: in pyranose sugars
- 9. 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
Correct Answer: synthesis of glucose from non-carbohydrate precursors
- 10. Under aerobic condition pyruvate is converted by pyruvate dehydrogenase to
Options- A. phosphoenol pyruvate
- B. acetyl CoA
- C. lactate
- D. glyceraldehyde 3 phosphate Discuss
Correct Answer: acetyl CoA
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