1. The major lipids that make up the cell membrane are

A) Triglycerides
B) Phospholipids
C) Sphingomyelins
D) Fatty acids

Ans: B
The major lipids that make up the cell membrane are phospholipids.
The most important phospholipid component of the cell membrane is cholestrol

2. Triglyceride is a

A) Simple lipid
B) Complex lipid
C) Derived lipid
D) None of the above

Ans: C,
These are esters of fatty acid with glycerol. Triacyl glycerols are neutral fats and function as fuel reserves of animals. Main storage form of fats and found in adipose tissue. Whereas, mono, di , glycerols are dervied lipids

3. A fatty acid that is not synthesized in man is

A) Linoleic acid
B) Oleic acid
C) Palmitic acid
D) Stearic acid

Ans: A

4. A deficiency of choline in the diet causes abnormalities in the metabolism of

A) Carbohydrates
B) Proteins
C) Minerals
D) Lipids

Ans: D

5. Which of the following does not significantly contribute to gluconeogenesis in humans

A) Lactate
B) Fatty acids
C) Pyruvate
D) Amino acids

Ans: B
Formation of glucose or glycogen from non carbohydrate source is called gluconeogenesis. Chief among them are glycogenic amino acids, lactate and glycerol. Formation of pyruvate to glucose is the ultimate step in glucogenesis

6. Fatty acid synthesis occurs in

A) Cytosol
B) Mitichondria
C) Endoplasmic reticulum
D) All of the above

Ans: A ;
The main pathway for de novo synthesis of fatty acids occurs in the cytosol. Whereas oxidation of fatty acids occur in the mitochondria.

7. Which of the following undergoes auto oxidation

A) Free fatty acids
B) Polyunsaturated fatty acids
C) Chylomicrons
D) Cholestrol

Ans: A

A) 7
B) 18
C) 56
D) 147

Ans: D

A) Carbohydrate
B) Protein
C) Fat
D) All of the above

Ans: D

10. HMG CoA is formed during metabolism of all except

A) Leucine
B) Cholesterol
C) ketone bodies
D) Bile acids

Ans: D
Inhibit 3 hydroxy 3 methyglutaryl coenzyme A ( HMG CoA) is formed from the HMG synthetase and the substrate is acetoacetyl CoA