Protein Engineering Mock Test 6

10%

Question 1 of 10

1. Which of the following proteins are involved in the transport of certain substances across lipid bilayer?

Transmembrane proteins

Peripheral proteins

Extracellular matrix proteins

Lipid-anchored proteins

Question 1 of 10

Question 2 of 10

2. Which of the following proteins are bound covalently to one or more lipid molecules in the plasma membrane?

Peripheral membrane proteins

Lipid-anchored proteins

Intrinsic proteins

Cytosolic proteins

Question 2 of 10

Question 3 of 10

3. The hydrophobic helix is prevented from slipping across the membrane by flanking a set of which amino acids?

Alanine and tyrosine

Lysine and arginine

Glycine and valine

Serine and methionine

Question 3 of 10

Question 4 of 10

4. The leucine zipper is a left-handed parallel dimeric coiled-coil.

False

True

Question 4 of 10

Question 5 of 10

5. Cytoskeleton proteins are associated loosely with the cytosolic face of the bilayer, through which proteins?

Cytosolic proteins

Lipid-anchored proteins

Peripheral proteins

Exoplasmic proteins

Question 5 of 10

Question 6 of 10

6. Which of the following is present beyond the immediate vicinity of the plasma membrane?

Nucleus

Chloroplast

ECM

Vacuum

Question 6 of 10

Question 7 of 10

7. Find the odd one out.

Selectins

Members of IgSF

Collagen

Cadherins

Question 7 of 10

Question 8 of 10

8. What is the modification in which a hydrocarbon chain is attached to an amino acid residue on a protein which helps it anchor onto the plasma membrane?

Ubiquitination

Methylation

Prenylation

Acetylation

Question 8 of 10

Question 9 of 10

9. Which of the following region of the alpha-helix in leucine zippers is amphipathic?

Both C and N terminus

Either C or N terminus

N terminus

C terminus

Question 9 of 10

Question 10 of 10

10. How much percent of the myelin membrane that surrounds the nerve axons, is protein?

95 %

18 %

46 %

27 %

Question 10 of 10