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Free Practice Quiz Question List

5 Metabolism and Energy Use Online Quiz Questions

Use this free practice quiz with 20 questions to review 5 Metabolism and Energy Use, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: Glycolysis takes place in the cytosol and splits one glucose molecule into two pyruvate molecules.

  1. A

    True

  2. B

    False

02
Choose one
1 point

When glucose supply exceeds immediate needs, which process builds glycogen for storage?

  1. A

    Glycogenolysis

  2. B

    Glycogenesis

  3. C

    Gluconeogenesis

  4. D

    Lipolysis

03
Fill in the blank
1 point

When amino acids are used for energy or are in excess, the liver converts much of the resulting nitrogen into for excretion.

04
Written response
1 point

What molecule serves as the cell’s immediately usable energy currency?

05
Choose one
1 point

What role does oxygen play in electron transport and oxidative phosphorylation?

  1. A

    It splits glucose into pyruvate.

  2. B

    It converts acetyl-CoA into glycogen.

  3. C

    It accepts electrons at the end of the chain and forms water.

  4. D

    It carries amino groups from the liver to the kidneys.

06
True or false
1 point

True or false: Most of the body’s stored fat is in the form of triglycerides.

  1. A

    True

  2. B

    False

07
Fill in the blank
1 point

When conditions permit, pyruvate enters mitochondria and is converted to , producing NADH and carbon dioxide.

08
Written response
1 point

What is the name of the process in which the liver, and in some circumstances the kidneys, make glucose from precursors such as lactate, glycerol, and certain amino acids?

09
Choose one
1 point

What is the primary use of amino acids in the body?

  1. A

    They are stored in a dedicated depot for later energy use.

  2. B

    They are primarily used to make proteins and other nitrogen-containing compounds.

  3. C

    They are converted directly into glycogen for storage.

  4. D

    They are used only to produce ATP.

10
Choose all
1 point

Select all statements that correctly describe broad hormonal patterns in nutrient regulation.

  1. A

    After a meal, insulin generally supports glucose uptake in responsive tissues and glycogen formation.

  2. B

    Between meals, glucagon helps maintain blood glucose by promoting liver glycogen breakdown and gluconeogenesis.

  3. C

    Between meals, glucagon generally directs muscle glycogen into the blood as glucose.

  4. D

    After a meal, insulin generally promotes the liver’s breakdown of glycogen to maintain blood glucose.

11
Choose all
1 point

Select all statements that correctly describe how metabolic pathways connect fuel breakdown with other processes.

  1. A

    Fatty acids can yield acetyl-CoA.

  2. B

    Some amino-acid carbon skeletons can enter the citric acid cycle directly.

  3. C

    Intermediates from energy pathways can be used to build other molecules.

  4. D

    Every fuel must pass through glycolysis before entering shared energy pathways.

12
Choose one
1 point

A cell uses energy and small molecules to build and maintain tissue. Which metabolic process is it carrying out?

  1. A

    Anabolism

  2. B

    Catabolism

  3. C

    Lipolysis

  4. D

    Glycogenolysis

13
Written response
1 point

Complete oxidation of one glucose molecule yields roughly 30–32 ATP, with the exact total varying with cellular conditions. Give a whole-number estimate in ATP; an absolute tolerance of 1 ATP applies.

14
Written response
1 point

How many net ATP molecules does glycolysis yield per glucose molecule?

15
True or false
1 point

When oxygen-dependent metabolism cannot keep pace with demand, converting pyruvate to lactate can allow glycolysis to continue producing ATP.

  1. A

    True

  2. B

    False

16
Choose one
1 point

A cell begins breaking down glucose before its products enter the mitochondria. In which part of the cell does this initial stage, glycolysis, occur?

  1. A

    The mitochondrial matrix

  2. B

    The cytosol

  3. C

    The inner mitochondrial membrane

  4. D

    The nucleus

17
Choose one
1 point

A cell uses energy and small molecules to build and maintain tissue. Which metabolic process best describes this activity?

  1. A

    Catabolism, because it builds tissues from small molecules

  2. B

    Anabolism, because it breaks molecules down to capture energy

  3. C

    Anabolism, because it uses energy and small molecules to build or maintain tissues

  4. D

    Neither, because tissue maintenance does not involve metabolism

18
Choose one
1 point

Which statement accurately compares how glycogen stored in skeletal muscle and in the liver is used?

  1. A

    Muscle glycogen is mainly used by the muscle itself, while the liver can release glucose into the blood.

  2. B

    Muscle glycogen is released into the blood, while liver glycogen can only be used by the liver.

  3. C

    Both muscle and liver glycogen are released directly into the blood in the same way.

  4. D

    Muscle glycogen is converted to ketone bodies, while liver glycogen is converted to urea.

19
Choose one
1 point

During oxidative phosphorylation, which molecule accepts electrons at the end of the electron-transport chain, helping form water?

  1. A

    NADH

  2. B

    Carbon dioxide

  3. C

    Acetyl-CoA

  4. D

    Oxygen

20
Open ended
1 point

During prolonged fasting, a person’s brain increases its use of a fuel made by the liver from some acetyl-CoA. Explain what this fuel is, how the liver makes it, and how its use by the brain changes during prolonged fasting.