Golgi Body

Question 1

How does the translocator protein know when to begin insertion of a transmembrane domain?

a. C-terminus start sequence

b. start-transfer sequence

c. start codon

d. signal peptidase activity

Answer 1

b. start-transfer sequence

((Remember that the start-transfer sequence CAN be on the N-terminus of a protein (the start) but for a multipass transmembrane protein it can be much further on in the polypeptide chain))

Question 2

N-linked glycosylation occurs on which of these amino acids?

a. threonine

b. serine

c. alanine

d. asparagine

Answer 2

d. asparagine

Question 3

GPI linkers use which of the following? (more than one answer may be correct)

a. fructose

b. glucose

c. inositol

d. phosphoethanolamine

Answer 3

c. inositol

d. phosphoethanolamine

Question 4

Which enzyme ensures the membrane in the ER has an equal balance of phospholipids?

Answer 4

Scramblase

Question 5

Fill in the following amino acids:

K:
D:
E:
L:

Answer 5

Lysine
Aspartic acid
Glutamic acid
Leucine

Question 6

How does pH change as you move from the cis cisternae to the trans cisternae?

Answer 6

pH decreases