Lesson 4: Bioenergetics

Question 1

Anabolism

Select one:

a. All of these answers are correct
b. Generally requires energy
c. Is also known as biosynthesis
d. Results in the increased size and complexity of structures
e. Refers to the build-up of substances

Answer 1

a. All of these answers are correct

Question 2

ATP can be used for

Select one:

a. All of these answers are correct
b. Muscle contractions
c. Body heat
d. Active transport
e. Activating enzymes

Answer 2

a. All of these answers are correct

Question 3

ATP contains a nucleotide (adenine), a sugar (D-ribofuranose) and three phosphates. The phosphates are joined using two phosphoric ester bonds and one phosphoric anhydride bond. True or False?

Answer 3

False

Question 4

ATP synthase is also known as

Select one:

a. Complex III
b. Complex II
c. Complex IV
d. Complex I
e. Complex V

Answer 4

e. Complex V

Question 5

Cells that use a lot of energy have more mitochondria than less active cells. True or False?

Answer 5

True

Question 6

Each molecule of NADH is oxidised in the electron transport chain to produce

Select one:

a. 1 ATP
b. 2 ATP
c. 12 ATP
d. 3 ATP
e. 6 ATP

Answer 6

d. 3 ATP

Question 7

FAD is a derivative of the B vitamin riboflavin. True or False?

Answer 7

True

Question 8

For each two carbon fragment entering the citric acid cycle (then oxidative phosphorylation), there are

Select one:

a. 6 ATP produced
b. 12 ATP produced
c. 25 ATP produced
d. 18 ATP produced
e. 8 ATP produced

Answer 8

b. 12 ATP produced

Question 9

GTP

Select one:

a. Is similar to ATP but guanine replaces adenosine
b. Can serve as a phosphate donor in some biochemical reactions
c. Stores energy in high-energy phosphoric anhydride bonds
d. All of these answers are correct
e. Can be readily converted to ATP

Answer 9

d. All of these answers are correct

Question 10

Step 1 of the citric acid cycle is positively regulated by ATP. True or False?

Answer 10

False

Question 11

The common catabolic pathway is called beta-oxidation. True or False?

Answer 11

False

Question 12

The energy released during catabolism is conserved as

Select one:

a. CoQ
b. NADH
c. AMP
d. ATP
e. FAD

Answer 12

d. ATP

Question 13

The formation of citrate occurs at what step of the citric acid cycle?

Select one:

a. Step 1
b. Step 6
c. Step 2
d. Step 5
e. Step 4

Answer 13

a. Step 1

Question 14

What do NAD+ and FAD carry from the citric acid cycle to the electron transport chain?

Select one:

a. Acetyl CoA
b. Oxygen
c. Carbon dioxide
d. Adenosine triposphate
e. Hydrogen

Answer 14

e. Hydrogen

Question 15

Which step of the citric acid cycle generates GTP?

Select one:

a. Step 6
b. Step 4
c. Step 1
d. Step 5
e. Step 2

Answer 15

d. Step 5