Question

Refer to this diagram for questions 1-10. The letters in the circles represent single letter code for amino acids. COOH-termi

Question 1

The protein in the diagram is (circle all that apply):

Group of answer choices

a) a peripheral membrane protein

b) an integral membrane protein

c) a lipid anchored protein

Question 2

The protein shown in the diagram could potentially function as (circle all that apply):

Group of answer choices

a) a receptor

b) a transmembrane anchor

c) a pore or channel

Question 3

The protein shown in the diagram has which of the following (choose all that apply)?

Group of answer choices

a) primary structure

b) secondary structure

c) tertiary structure

d) quaternary structure

Question 4

The structures in the red circles represent which of the following (choose all that apply)?

Group of answer choices

a) fatty acid

b) cholesterol

c) oligosaccharides

d) GPI anchors

Question 5

The structures in the red squares represent which of the following (choose all that apply)?

Group of answer choices

a) fatty acids

b) cholesterol

c) oligosaccharides

d) GPI anchors

Question 6

The red arrow is pointing to which of the following (choose all that apply)?

Group of answer choices

a) an intramolecular bond

b) an intermolecular bond

c) an amino acid

d) a disulfide bond

e) a van der Waals interaction

Question 7

Which of the following are important for stabilizing the tertiary structure of this protein (circle all that apply)?

Group of answer choices

a) the structure in the red squares

b) the structure in the red circles

c) the structure indicated by the red arrow

d) hydrophobic/hydrophilic interactions

e) hydrogen bonding

f) van der Waals interactions

Question 8

What structural feature allows this protein to span the lipid bilayer?

Group of answer choices

a) quaternary structure

b) beta pleated sheets

c) alpha helices

d) both beta pleated sheets and alpha helices

Question 9

What chemical bonding or interaction stabilizes the structure you chose for “8”?

Group of answer choices

a) ionic bonds

b) van der Waals interactions

c) hydrogen bonding

d) covalent bonding

e) hydrophobic/hydrophilic interactions

Question 10

You entered the primary amino acid sequences of this protein into the protein database and generated one of the plots shown below in which the relative average hydrophobicity of amino acids is plotted on a scale of 1-10 (with 1 being very hydrophilic and 10 being very hydrophobic). The individual data points on the graph represent the average hydrophobicity of 5 amino acid blocks (for example, amino acids 1-5, 2-6, 3-7, etc), all the way along the protein.

Which of the graphs below (A-F) describes the protein in the diagram at the beginning of the problem set?

Hydrophobicity plots

Hydrophobicity plots

0 0
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Answer #1

1. The protein in the diagram is an integral membrane protein.

2. The protein shown in the diagram could potentially function as a receptor.

3. the protein shown in the diagram has quaternary structure.

4. The structure in the red circle represents cholesterol.

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