Metabolism Regulation MCQs with Answers

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Metabolism Regulation Online Quiz

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• Test Name: Metabolism Regulation MCQ Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

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Metabolism Regulation

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1 / 40

What is the effect of high levels of acetyl-CoA on pyruvate dehydrogenase?

Activates the enzyme

Inhibits the enzyme

No effect

2 / 40

What is the main regulatory enzyme of gluconeogenesis?

Fructose-1,6-bisphosphatase

Glucose-6-phosphatase

Pyruvate carboxylase

3 / 40

What is the effect of glucagon on hepatic fructose-2,6-bisphosphate levels?

Increases levels

No effect

Decreases levels

4 / 40

What is the primary effect of glucagon on the liver?

Stimulates glycolysis

Stimulates gluconeogenesis

Stimulates glycogenesis

5 / 40

What is the primary effect of insulin on muscle cells?

Inhibits glucose uptake

No effect

Stimulates glucose uptake

6 / 40

What is the primary role of AMP-activated protein kinase (AMPK) in metabolism?

Stimulates energy production

No effect

Inhibits energy production

7 / 40

How does ATP affect the enzyme pyruvate kinase?

No effect

Activates pyruvate kinase

Inhibits pyruvate kinase

8 / 40

How does insulin affect glycogen synthesis in muscle cells?

Stimulates synthesis

No effect

Inhibits synthesis

9 / 40

How does malonyl-CoA affect carnitine palmitoyltransferase I (CPT I)?

No effect

Inhibits CPT I

Activates CPT I

10 / 40

What is the primary effect of AMP on phosphofructokinase?

Inhibits the enzyme

Activates the enzyme

No effect

11 / 40

Which hormone decreases blood glucose levels?

Epinephrine

Insulin

Glucagon

12 / 40

How does ATP affect phosphofructokinase activity in glycolysis?

No effect

Activates activity

Inhibits activity

13 / 40

Which enzyme is regulated by fructose-2,6-bisphosphate?

Hexokinase

Pyruvate kinase

Phosphofructokinase

14 / 40

How does insulin affect fatty acid synthesis?

Stimulates synthesis

Inhibits synthesis

No effect

15 / 40

Which molecule is a key activator of pyruvate carboxylase?

ATP

Acetyl-CoA

Citrate

16 / 40

Which hormone is primarily responsible for decreasing blood glucose levels?

Glucagon

Epinephrine

Insulin

17 / 40

How does glucagon affect glycogen synthesis in the liver?

Inhibits glycogen synthesis

No effect

Stimulates glycogen synthesis

18 / 40

Which enzyme is inhibited by high levels of citrate?

Pyruvate kinase

Hexokinase

Phosphofructokinase

19 / 40

What is the effect of epinephrine on glycogenolysis in the liver?

Inhibits glycogenolysis

No effect

Stimulates glycogenolysis

20 / 40

How does glucagon affect hepatic glucose production?

Increases production

Decreases production

No effect

21 / 40

How does ATP inhibit isocitrate dehydrogenase?

Competitive inhibition

Allosteric inhibition

Covalent modification

22 / 40

What is the main regulatory enzyme of the citric acid cycle?

Citrate synthase

Succinyl-CoA synthetase

Isocitrate dehydrogenase

23 / 40

What is the main regulatory enzyme of glycolysis?

Hexokinase

Pyruvate kinase

Phosphofructokinase

24 / 40

How does citrate affect acetyl-CoA carboxylase?

Activates acetyl-CoA carboxylase

No effect

Inhibits acetyl-CoA carboxylase

25 / 40

Which enzyme is inhibited by ATP and citrate in glycolysis?

Pyruvate kinase

Hexokinase

Phosphofructokinase

26 / 40

What is the effect of high levels of ATP on glycolysis?

No effect

Activates glycolysis

Inhibits glycolysis

27 / 40

What is the effect of insulin on glucose transporter type 4 (GLUT4) in muscle cells?

No effect

Decreases GLUT4 translocation

Increases GLUT4 translocation

28 / 40

Which hormone is primarily responsible for stimulating lipolysis?

Glucagon

Epinephrine

Insulin

29 / 40

Which enzyme is the rate-limiting step in cholesterol synthesis?

Mevalonate kinase

HMG-CoA synthase

HMG-CoA reductase

30 / 40

How does AMPK affect muscle glucose uptake?

No effect

Decreases uptake

Increases uptake

31 / 40

What is the role of cortisol in metabolism?

Increases glycolysis

Decreases gluconeogenesis

Increases gluconeogenesis

32 / 40

What is the effect of statins on cholesterol levels?

Increase cholesterol synthesis

No effect

Decrease cholesterol synthesis

33 / 40

What is the primary effect of insulin on adipose tissue?

Stimulates fat storage

No effect

Inhibits fat storage

34 / 40

How does high NADH/NAD+ ratio affect the citric acid cycle?

Stimulates the cycle

Inhibits the cycle

No effect

35 / 40

How does epinephrine affect glycogen breakdown in muscle cells?

No effect

Inhibits breakdown

Stimulates breakdown

36 / 40

Which molecule is an allosteric activator of phosphofructokinase?

AMP

Citrate

ATP

37 / 40

How does insulin affect the enzyme glycogen synthase?

Inhibits glycogen synthase

Activates glycogen synthase

No effect

38 / 40

How does high levels of AMP affect glycogen phosphorylase?

Inhibits glycogen phosphorylase

Activates glycogen phosphorylase

No effect

39 / 40

Which enzyme is the rate-limiting step in fatty acid synthesis?

Malonyl-CoA decarboxylase

Fatty acid synthase

Acetyl-CoA carboxylase

40 / 40

What is the primary effect of AMPK on fatty acid oxidation?

No effect

Inhibits oxidation

Stimulates oxidation

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