The initial effect of insulin binding on muscle cells is the translocation of ____.
A) GLUT4
D) adenylate cyclase
B) β-adrenergic receptors
E) G proteins
C) α-adrenergic receptors - Answer A) GLUT4
The initial effect of insulin binding on muscle cells is the translocation of ____.
A) GLUT4
D) adenylate cyclase
B) β-adrenergic receptors
E) G proteins
C) α-adrenergic receptors - Answer A) GLUT4
Which of the following occurs during the Cori cycle?
A) Lactate is transported in the blood stream from the liver to the muscle.
B) Lactate is converted to glucose, in the liver, via gluconeogenesis.
C) Lactate dehydrogenase activity is inhibited in the muscle.
D) NAD+ is regenerated in the liver by the conversion of pyruvate to lactate. - Answer B)
Lactate is converted to glucose, in the liver, via gluconeogenesis.
The precursor of serine is
A) 2-phosphoglycolate
D) aspartate
B) glycine
E) α-ketoglutarate
C) 3-phosphoglycerate - Answer C) 3-phosphoglycerate
After 3 rounds of β-oxidation, a fatty acyl-CoA intermediate is produced which is
designated 12:0.
, What was the designation of the original fatty acid, prior to its activation? A) 18:0 B)
15:0 C) 16:1 D) 17:1 E) 16:0 - Answer A) 18:0
The breakdown products of isoleucine are succinyl-CoA and acetyl-CoA. This amino acid
would
be classified as
A) ketogenic B) glucogenic
C) Both glucogenic and ketogenic - Answer C) Both glucogenic and ketogenic
Is hormone-sensitive lipase activated, inhibited, or unaffected in response to a glucagon
signal?
A) Unaffected B) Activated C) Inhibited - Answer B) Activated
Fat is a more efficient store of energy than carbohydrate. Which of the following is NOT
a factor in
this?
A) Fat is catabolized only aerobically; carbohydrate can be catabolized anaerobically.
B) Per gram, fatty acids contain twice as many calories as glucose.
C) Carbohydrates are polar, hydrophilic molecules.
D) Fatty acids are more highly reduced than carbohydrates. - Answer A) Fat is
catabolized only aerobically; carbohydrate can be catabolized anaerobically.
Which of the following statements about malonyl-CoA is FALSE?
A) Malonyl-CoA is a "temporary store" of free energy or a high-energy intermediate.
B) Malonyl-CoA is an inhibitor of carnitine acyl transferase.
C) Malonyl-CoA is an intermediate of cholesterol synthesis.
D) Malonyl-CoA is produced in a carboxylation reaction. - Answer C) Malonyl-CoA is an
intermediate of cholesterol synthesis.
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