Module 3: The Plasma Membrane and Mitochondria

Question 1

The inner membrane of the mitochondria is called the :

Question 1 options:
b. matrix
c. cristae
a. lipid bilayer
d. plasma membrane

Answer 1

c. cristae

Question 2

Glucose enters cells

Question 2 options:
a. by a specific transporter
b. down its chemical gradient
d. endocytosis
c. by diffusion

Answer 2

a. by a specific transporter

Question 3

At the end of glycolysis, how much ATP has been produced?

Question 3 options:
a. 2
b. 4
c. 16
d. 32

Answer 3

a. 2

Question 4

Under anaerobic conditions pyruvate is converted into:

Question 4 options:
c. fructose
d. citrate
b. lactate
a. acetyl-CoA

Answer 4

b. lactate

Question 5

During the electron transport chain, H+ are concentrated in the

Question 5 options:
a. cytosol
c. inner membrane
b. matrix
d. intermembrane space

Answer 5

d. intermembrane space

Question 6

Which of the following molecules contains the most stored energy?

Question 6 options:
d. a dissacharide
c. an amino acid
b. a fatty acid
a. a monosaccharide

Answer 6

b. a fatty acid

Question 7

What is the primary energy source for the brain?

Question 7 options:
d. amino acids
a. glucose
c. ketones
b. fatty acids

Answer 7

a. glucose

Question 8

What is the primary energy source for the heart?

Question 8 options:
d. amino acids
c. ketones
a. glucose
b. fatty acids

Answer 8

b. fatty acids

Question 9

Drinking sea water with a high salt content will result in a loss of water in the body because sea water is:

Question 9 options:
a. Hypertonic
d. Hydrotonic
c. Hypotonic
b. Isotonic

Answer 9

a. Hypertonic

Question 10

Which of the following can pass freely through the plasma membrane?

Question 10 options:
d. Phosphate (PO43-)
b. Nitric oxide (NO)
a. Alcohol
c. Glucose

Answer 10

b. Nitric oxide (NO)

Question 11

What is true about the charges of the head groups of phospholipids and their location in the leaflets?

Question 11 options:
d. PE is positively charged and cytosolic
a. PS is polar and explasmic
b. CL is positively charged and cytosolic
c. PI is negatively charged and in both leaflets equally

Answer 11

d. PE is positively charged and cytosolic

Question 12

Which of the following will increase the fluidity of the plasma membrane?

Question 12 options:
c. Cholesterol content greater than 50%
b. Increased temperature
d. High amounts of protein.
a. Lower unsaturated lipid content.

Answer 12

b. Increased temperature