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Biochemistry ACS Review Questions and Correct Answers the Latest Update

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  • Biochemistry ACS
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  • Biochemistry ACS

All of the compounds represent different metabolites of pyruvate except: A. Acetyl-CoA B. Alanine C. Glutamate D. Lactate E. Oxaloacetate C. Glutamate Signal transduction involving glucagon has which of the following as a second messenger? A. Ca^2+ B. cAMP C. cGMP D. calmodulin E. in...

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  • October 25, 2024
  • 23
  • 2024/2025
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  • Biochemistry ACS
  • Biochemistry ACS
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Biochemistry ACS Review Questions
and Correct Answers the Latest
Update
All of the compounds represent different metabolites of pyruvate except:




A. Acetyl-CoA

B. Alanine

C. Glutamate

D. Lactate

E. Oxaloacetate

✓ C. Glutamate



Signal transduction involving glucagon has which of the following as a second

messenger?




A. Ca^2+

B. cAMP

C. cGMP

D. calmodulin

E. inositol triphosphate (IP3)

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✓ B. cAMP



The key regulatory enzymes that commit the cell to either glycolysis or

gluconeogenesis are PFK-1 and FBPase-1. Which molecule is the key allosteric

effector of the PFK-1/FBPase-1 enzyme system?




A. Glucose

B. Glucose-6-phosphate (G6P)

C. Fructose-6-phosphate (F6P)

D. Fructose-1,6-biphosphate (FBP)

E. Fructose-2,6-biphosphate (F2,6P)

✓ E. F2,6P



Which is not required for the oxidative decarboxylation of pyruvate to form

acetyl-CoA by the pyruvate dehydrogenase complex?




A. NAD+

B. FADH2

C. Lipoic acid

D. Coenzyme A

E. Thiamine Pyrophosphate (TPP)


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✓ B. FADH2



As glucose levels in the blood begin to drop, glucagon is released from the alpha

cells of the pancreas. Release of this polypeptide hormone helps increase the

availability of ATP-producing compound by




A. inhibiting acetyl-Coa carboxylase causing an increased in beta-oxidation

B. stimulating glycogen phophorylase causing the release of glucose from

glycogen

C. stimulating hormone-sensitive triacylglycerol lipase in adipose cells causing

the release of fatty acids

D. all of the above

E. none of the above

✓ D. all of the above



During starvation or diabetes mellitus the brain derives most of its energy from




A. fatty acids

B. glucose

C. ketone bodies

D. glycogen


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