logo

CuriousTab

CuriousTab

Ads
Glycolysis (Biochemistry) Question and Answers-Page first

Glycolysis problems


  • 1. During glycolysis, the major energy generating step involves

  • Options
  • A. pyruvate kinase
  • B. phosphoglycerate kinase
  • C. glyceraldehyde-3 -dehydrogenase
  • D. Phosphofructokinase
  • Discuss
  • 2. ATP is from which general category of molecules?

  • Options
  • A. Polysaccharides
  • B. Proteins
  • C. Nucleotides
  • D. Amino acids
  • Discuss
  • 3. Which of the following is not a mechanism for altering the flux of metabolites through the rate-determining step of a pathway?

  • Options
  • A. Allosteric control of the enzyme activity
  • B. Diffusional coupling between adjacent active sites
  • C. Genetic control of the enzyme concentration
  • D. Covalent modification of the enzyme
  • Discuss
  • 4. Glycolytic pathway regulation involves

  • Options
  • A. allosteric stimulation by ADP
  • B. allosteric inhibition by ATP
  • C. feedback, or product, inhibition by ATP
  • D. all of the above
  • Discuss
  • 5. In the glycogen synthase reaction, the precursor to glycogen is

  • Options
  • A. glucose-6-P
  • B. UTP-glucose
  • C. UDP-glucose
  • D. glucose-1-P
  • Discuss
  • 6. Glucose from the breakdown of glycogen is obtained in

  • Options
  • A. the liver by phosphorolysis
  • B. the muscles by phosphorolysis
  • C. the muscles by hydrolysis
  • D. both (a) and (b)
  • Discuss
  • 7. 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
  • 8. 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
  • 9. In glycolysis, ATP is formed by the transfer of a high-energy phosphate from 1,3-bisphosphoglycerate to ADR No such high-energy phosphate donor has ever been isolated in mitochondria because

  • Options
  • A. the techniques for isolating the phosphate donor are not refined enough
  • B. no such phosphate donor exists
  • C. the high-energy phosphate donor is very short-lived and difficult to isolate
  • D. None of the above
  • Discuss
  • 10. Phosphofructokinase, the major flux-controlling enzyme of glycolysis is allosterically inhibited and activated respectively by

  • Options
  • A. ATP and PEP
  • B. AMP and Pi
  • C. ATP and ADP
  • D. Citrate and ATP
  • Discuss

First 2 3