Review questions for Cell Cytoplasm 2 and 3

Question 1

Which of the following organelles serves as the site for beta oxidation of VERY LONG FATTY ACID

a. Smooth ER
b. Mitochondrion
c. Lysosomes
d. Peroxisomes

Answer 1

d. Peroxisomes

Peroxisomes - beta oxidation of VERY LONG FATTY ACIDS
Mitochondrion - beta oxidation of fatty acids
Needs back up (peroxisome) to beta oxidized very long
fatty acids

Question 2

Which of the following organelles is known to have two sets of
membrane?

a. Mitochondrion
b. Peroxisome
c. Lysosome
d. Rough ER

Answer 2

a. Mitochondrion

Outer membrane
Inner membrane

Question 3

Which organelle is primarily involved in Autophagy?

a. Lysosomes
b. Mitochondrion
c. Smooth ER
d. Rough ER

Answer 3

a. Lysosomes - contains hydrolytic enzymes that digest nonfuntional
organelles.
AUTOPHAGY “self-eating”

Question 4

Transfer of maternal IgGs to the fetal circulation through the
placenta is an example of

a. Transcytosis
b. Pinocytosis
c. Endocytosis
d. Phagocytosis

Answer 4

a. Transcytosis - a process where maternal IgGs passes thru the
placenta but are not metabolized.

Question 5

It degrades, denatured, misfolded and nonfunctional polypeptides into small polypeptides and amino acids.

a. Peroxisome
b. Lysosome
c. Proteasome
d. Mitochondrion

Answer 5

c. Proteasome - not an organelle but an enzyme that removes
proteins that are no longer functional

Question 6

What pathway involves if the protein is synthesized from the Rough ER goes to Golgi apparatus then transported elsewhere?

a. Retrograde Pathway
b. Anterograde Pathway
c. Both
d. None of the above

Answer 6

b. Anterograde Pathway / Forward Pathway
Rough ER > Golgi Apparatus > Outside the cell