Question 1

When muscle tissue is exercising under anaerobic conditions,the production of ______ is important because it ensures a continuous supply of NAD+.

Accepted Answer

A)  glucose-6-phosphate 
B)  pyruvate 
C)  lactate 
D)  glycogen 
A)  glucose-6-phosphate 
B)  pyruvate 
C)  lactate 
D)  glycogen

Question 2

Why is the mitochondrion called the powerhouse of the cell?

Accepted Answer

The mitochondrion is often referred to a

Question 3

The kidney is the major organ that regulates metabolism.

Accepted Answer

A) True 
 B)False

Question 4

After a period of prolonged fasting (starving),the brain changes its fuel requirements

Accepted Answer

A)  and uses amino acids directly. 
B)  and starts to use glycerol as the primary source of energy. 
C)  and starts to use ketones and spares protein. 
D)  and glycogen becomes the primary source of energy. 
A)  and uses amino acids directly. 
B)  and starts to use glycerol as the primary source of energy. 
C)  and starts to use ketones and spares protein. 
D)  and glycogen becomes the primary source of energy.

Question 5

The electron transport chain takes place in the cytosol.

Accepted Answer

A) True 
 B)False

Question 6

In the metabolism of amino acids for energy,the amine group is

Accepted Answer

A)  stored in the liver. 
B)  converted to glucose. 
C)  excreted as urea. 
D)  burned for energy. 
A)  stored in the liver. 
B)  converted to glucose. 
C)  excreted as urea. 
D)  burned for energy.

Question 7

The conversion of pyruvate to acetyl-CoA is reversible.

Accepted Answer

A) True 
 B)False

Question 8

Fasting or starvation accelerates

Accepted Answer

A)  gluconeogenesis. 
B)  ketone production. 
C)  body protein breakdown. 
D)  body fat breakdown. 
E)  All of these choices are correct. 
A)  gluconeogenesis. 
B)  ketone production. 
C)  body protein breakdown. 
D)  body fat breakdown. 
E)  All of these choices are correct.

Question 9

The energy currency the body uses is

Accepted Answer

A)  NAD. 
B)  FAD. 
C)  TCA. 
D)  ATP. 
A)  NAD. 
B)  FAD. 
C)  TCA. 
D)  ATP.

Question 10

Before protein becomes an energy source,the _________ must be removed from the molecule.

Accepted Answer

A)  COOH 
B)  CH3 
C)  NH2 
D)  CO2 
A)  COOH 
B)  CH3 
C)  NH2 
D)  CO2

Question 11

Nicotinamide adenine dinucleotide (NAD)

Accepted Answer

A)  transports oxygen in various metabolic pathways. 
B)  picks up and delivers hydrogens to acceptor molecules. 
C)  is another form of ATP. 
D)  is a form of lactic acid. 
A)  transports oxygen in various metabolic pathways. 
B)  picks up and delivers hydrogens to acceptor molecules. 
C)  is another form of ATP. 
D)  is a form of lactic acid.

Question 12

In which compartment of the cell do Krebs cycle and fatty acid oxidation take place?

Accepted Answer

A)  cell membrane. 
B)  mitochondria. 
C)  nucleus. 
D)  cytosol. 
A)  cell membrane. 
B)  mitochondria. 
C)  nucleus. 
D)  cytosol.

Question 13

Which of the following energy-yielding nutrients can be converted to glucose?

Accepted Answer

A)  carbohydrates 
B)  lipids 
C)  proteins 
D)  carbohydrates and proteins 
A)  carbohydrates 
B)  lipids 
C)  proteins 
D)  carbohydrates and proteins

Question 14

During the end reaction of the electron transport chain,oxygen becomes

Accepted Answer

A)  reduced to water (H2O). 
B)  oxidized to carbon dioxide 
C)  NADH. 
D)  FADH2. 
A)  reduced to water (H2O). 
B)  oxidized to carbon dioxide 
C)  NADH. 
D)  FADH2.

Question 15

In fatty acid synthesis,the "starting" molecule is

Accepted Answer

A)  glycerol. 
B)  acetyl-CoA. 
C)  ATP. 
D)  pyruvate. 
A)  glycerol. 
B)  acetyl-CoA. 
C)  ATP. 
D)  pyruvate.

Question 16

The common pathway for the oxidation of glucose and fatty acids is

Accepted Answer

A)  glycolysis. 
B)  the Cori cycle. 
C)  the citric acid cycle. 
D)  ketosis. 
A)  glycolysis. 
B)  the Cori cycle. 
C)  the citric acid cycle. 
D)  ketosis.

Question 17

Ketones are produced from:

Accepted Answer

A)  cholesterol. 
B)  hormones. 
C)  amino acids. 
D)  acetyl-CoA. 
A)  cholesterol. 
B)  hormones. 
C)  amino acids. 
D)  acetyl-CoA.

Question 18

Gluconeogenesis is the process whereby the body

Accepted Answer

A)  converts glucose to its storage form. 
B)  retrieves stored glucose from the liver. 
C)  lowers the glucose level of the blood. 
D)  produces glucose from amino acid and glycerol molecules. 
A)  converts glucose to its storage form. 
B)  retrieves stored glucose from the liver. 
C)  lowers the glucose level of the blood. 
D)  produces glucose from amino acid and glycerol molecules.

Question 19

If oxygen is present,metabolism is considered to be

Accepted Answer

A)  active. 
B)  anaerobic. 
C)  aerobic. 
D)  inactive. 
A)  active. 
B)  anaerobic. 
C)  aerobic. 
D)  inactive.

Question 20

Transamination is the process by which

Accepted Answer

A)  fatty acids break apart to form acetyl-CoA. 
B)  glucose breaks apart to form pyruvate. 
C)  amino groups are transferred from a donor to an acceptor. 
D)  NADH + H+ and FADH2 are converted to NAD+ and FAD, donating electrons and hydrogen ions to oxygen. 
E)  energy derived from NADH + H+ and FADH2 is used to generate ATP. 
A)  fatty acids break apart to form acetyl-CoA. 
B)  glucose breaks apart to form pyruvate. 
C)  amino groups are transferred from a donor to an acceptor. 
D)  NADH + H+ and FADH2 are converted to NAD+ and FAD, donating electrons and hydrogen ions to oxygen. 
E)  energy derived from NADH + H+ and FADH2 is used to generate ATP.

When muscle tissue is exercising under anaerobic conditions,the production of ______ is important because it ensures a continuous supply of NAD⁺.

Why is the mitochondrion called the powerhouse of the cell?

The kidney is the major organ that regulates metabolism.

After a period of prolonged fasting (starving),the brain changes its fuel requirements

The electron transport chain takes place in the cytosol.

In the metabolism of amino acids for energy,the amine group is

The conversion of pyruvate to acetyl-CoA is reversible.

Fasting or starvation accelerates

The energy currency the body uses is

Before protein becomes an energy source,the _________ must be removed from the molecule.

Nicotinamide adenine dinucleotide (NAD)

In which compartment of the cell do Krebs cycle and fatty acid oxidation take place?

Which of the following energy-yielding nutrients can be converted to glucose?

During the end reaction of the electron transport chain,oxygen becomes

In fatty acid synthesis,the "starting" molecule is

The common pathway for the oxidation of glucose and fatty acids is

Ketones are produced from:

Gluconeogenesis is the process whereby the body

If oxygen is present,metabolism is considered to be

Transamination is the process by which

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Exam 9: Energy Metabolism

When muscle tissue is exercising under anaerobic conditions,the production of ______ is important because it ensures a continuous supply of NAD+.

Why is the mitochondrion called the powerhouse of the cell?

The kidney is the major organ that regulates metabolism.

After a period of prolonged fasting (starving),the brain changes its fuel requirements

The electron transport chain takes place in the cytosol.

In the metabolism of amino acids for energy,the amine group is

The conversion of pyruvate to acetyl-CoA is reversible.

Fasting or starvation accelerates

The energy currency the body uses is

Before protein becomes an energy source,the _________ must be removed from the molecule.

Nicotinamide adenine dinucleotide (NAD)

In which compartment of the cell do Krebs cycle and fatty acid oxidation take place?

Which of the following energy-yielding nutrients can be converted to glucose?

During the end reaction of the electron transport chain,oxygen becomes

In fatty acid synthesis,the "starting" molecule is

The common pathway for the oxidation of glucose and fatty acids is

Ketones are produced from:

Gluconeogenesis is the process whereby the body

If oxygen is present,metabolism is considered to be

Transamination is the process by which

The Science of Nutrition

Tools of a Healthy Diet

The Food Supply

Human Digestion and Absorption

Carbohydrates

Lipids

Protein

Alcohol

Energy Balance,weight Control, Eating Disorders

Nutrition, exercise, and Sports

Fat-Soluble Vitamins

Water-Soluble Vitamins

Water and Major Minerals

Trace Minerals

Nutritional Aspects of Pregnancy and Breastfeeding

Nutrition During the Growing Years

Nutrition Throughout Adulthood

Filters

When muscle tissue is exercising under anaerobic conditions,the production of ______ is important because it ensures a continuous supply of NAD⁺.