1.You have found a membrane protein that is associated with lipids I\'m the memb

Question

1.You have found a membrane protein that is associated with lipids I'm the membrane through weak forces. How do you classify this protien?

A. Integral

B. Peripheral

C. Lipid-anchored

2. Which of the following does not result from charge interaction?

A. Hydrogen bond

B. Electrostatic interaction

C.Van der waals

D. Hydrophobic

E. None of the above

3. Suppose you were culturing a population of bacteria at 35 degrees Celsius and then lowered the temperature of the culture to 17 degrees Celsius. What effect do you think this might have on the fatty acid composition of the membrane?

A. The amount of saturated fatty acid decreases

B. The amount of saturated fatty acid would increase

C. The amount of saturated fatty acids would decrease

D. Cholesterol would be exposed on the cell surface

E. The composition of fatty acids would remain unchanged

Explanation / Answer

1)B. Peripheral

because peripheral protein adhere only temporarily to the cell membrane to which they are connected by weak forces

2)C)Vanderwals because it is the sum of attrative and repulsive forces between atoms and molecules which involves no charge at all.

3)B)The amoing of saturated fatty acid would increase because it will raise the transition temperature of lipid biplayer which causes the acitivity of the membrane to destaurate.

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