Biochemistry - Membrane Structure and Functions

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Exercise :: Membrane Structure and Functions - Section 1

  • Membrane Structure and Functions - Section 1
1. 

Cholesterol is somewhat amphipathic due to

A. the single hydroxyl along with the hydrocarbon nature of the remainder of the molecule
B. the long branched hydrocarbon along with the four hydrocarbon rings
C. the five-methyl groups along with the hydrocarbon chain
D. the three six-membered rings along with the single five-membered ring

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

2. 

Bacteriorhodopsin

A. absorbs light and pumps protons
B. is an integral membrane protein
C. contains primarily alpha-helical residues
D. all of the above

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

3. 

In active transport, the membrane structure that functions is

A. cholesterol
B. integral proteins
C. carbohydrates
D. hydrophobic molecules

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

4. 

Cholesterol is essential for normal membrane functions because it

A. plugs up the cardiac arteries of older men
B. cannot be made by higher organisms
C. keeps membranes fluid.
D. spans the thickness of the bilayer

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

5. 

The model that is now known to be correct for the structure of biological membrane is

A. Fluid mosaic model
B. Page's model
C. Lac Operon model
D. Lock and Key model

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.