Q3. The synthesis of both triacylglycerols and glycerophospholipids involves whi

Question

Q3.

The synthesis of both triacylglycerols and glycerophospholipids involves which of the following?

Select one:

a. The formation of ester linkages between the first two alcohol groups of glycerol phosphate with two different acyl-CoA groups

b. The formation of phosphatidic acid, which can be used to form triacylglycerols or glycerophospholipids

c. The use of five ATP equivalents; one in the formation of glycerol phosphate and two each for the formation of two acyl-CoA molecules

d. Usually, the addition of different acyl-CoA groups onto the glycerol phosphate

e. All of the above

Q4. The energy required for the addition of the head groups onto the glycerol backbone in glycerophospholipid synthesis comes from which of the following?

Select one:

a. An AMP moiety attached to either diacylglycerol or the head group

b. A CMP moiety attached to either diacylglycerol or the head group

c. A UMP moiety attached to either diacylglycerol or the head group

d. A GMP moiety attached to either diacylglycerol or the head group

e. A TMP moiety attached to either diacylglycerol or the head group

Q5 .

The variation in the types of lipids found in membranes, comparing different cells, organelles of one cell, and even the two faces of a double membrane to those within one face of a membrane, has evolved from the membrane developing the following roles.

Select one:

a. Membranes have roles in: the formation of stable membranes and thus structures, external recognition, internal signalling, and protein function.

b. Membranes have roles in: energy storage, external recognition, internal signalling, and protein function.

c. Membranes have roles in: the formation of stable membranes and thus structures, energy storage, internal signalling, and protein function.

d. Membranes have roles in: the formation of stable membranes and thus structures, external recognition, energy storage, and protein function.

e. Membranes have roles in: the formation of stable membranes and thus structures, external recognition, internal signalling, and energy storage.

Explanation / Answer

Ans 3. E ) all the above

Ans 4. B) A CMP moeity attached to either diacylglycerol or head group.

Ans 5. C) formation of stable membrane and thus structure, energy storage ,internal signalling, and protein function

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