A&P Ch 4. Cellular Metabolism/Respiration Quiz

Which of the following is true about the TCA cycle?

Begins with the formation of a molecule of citric acid

Which of the following is not true about metabolism of lipids?

Fats have very high amounts of water.

Which of the following molecules serves as the primary source of readily available fuel for neurons and blood cells?

Glucose

Which of the following causes lipogenesis to become the primary activity in the adipose tissues?

High blood sugar

Glucose enters cells via facilitated diffusion, which is largely enhanced by which of the following?

Insulin

Cytochromes contain which of the following metal atoms?

Iron

What is the result of ketosis?

Metabolic acidosis

A person who consumes many complex carbohydrates has more glycogen stored in which of the following organs?

Muscles

Gluconeogenesis is especially important for protection of which of the following body systems?

Nervous

Which of the following occurs during glycolysis?

One molecule of glucose is converted into two molecules of pyruvic acid.

Which of the following mechanisms produces the most ATP during cellular respiration?

Oxidative phosphorylation

If ketone bodies are present in large quantities in the urine and blood, there is usually increased metabolism of:

fatty acids.

What occurs during the process of gluconeogenesis?

glucose is formed from noncarbohydrate precursors

The synthesis of larger molecules from smaller ones is called:

anabolism

When simple sugar molecules make up molecules of glycogen, the process is referred to as:

anabolism.

In the process of glycolysis, glucose is broken down to yield:

pyruvic acid and lactic acid.

Which of the following produces a significant amount of energy in cellular respiration?

------- b) Oxygen c) Glucagon d) Pyruvic acid e) Oxaloacetic acid

In the process of cellular respiration, each molecule of glucose that is metabolized releases enough energy to form how many molecules of ATP

36

The target of enzyme action is called the:

substrate.

The carbon dioxide of respiration is formed during:

the TCA cycle

In transamination, the amino group of an amino acid is

transferred to a keto acid.

Which of the following is not a feature of beta oxidation?

a) It occurs in the mitochondria. b) All second carbons are reduced. c) It involves anabolism of fats. d) WRONG Fatty acids are broken into acetic acid fragments. e) All of these are correct.

Glycerol is easily converted to act as an intermediate substance during glycolysis. Which of the following is this intermediate substance?

------------------ b) Acetic acid c) Acetyl CoA d) Triglyceride e) Glyceraldehyde-3-phosphate

In glycolysis, each molecule of glucose metabolized releases enough energy to form how many molecules of ATP?

2

Lipogenesis generally begins with

Acetyl CoA

Pyruvic acid combines with a coenzyme to form which of the following?

Acetyl CoA

An electrochemical proton (H+) gradient is created across the:

inner mitochondrial membrane.

Which of the following acts as an intermediary that accepts electrons from one molecule and transfers them to another molecule?

Coenzyme

The oxidative deamination and energy use of amino acids are promoted by which of the following?

Excessive amounts of dietary proteins

Along with water, which of the following is the end product of the combination of ammonia with carbon dioxide?

Question options: a) D-amino oxidase b) Ketone c) Urea ---------- e) Glycogen

Acetyl CoA is produced when acetic acid combines with coenzyme A. This coenzyme contains which of the following?

Sulfur derived from vitamin B5

Which of the following occurs during lipolysis?

Triglycerides are broken down into glycerol and fatty acids.

Glycolysis is a process of breaking down glucose to yield pyruvic acid and

lactic acid

A polypeptide is formed from:

many amino acids.