MCQ on Biomolecules - Carbohydrates, Proteins and Lipids | Biochemistry MCQs

1. An amino acid with a non the polar side chain is

A) Asparagine

B) Alanine

C) Glutamine

D) Serine

2. Sulphur containing amino acids

A) glycine
B) leucine

C) cysteine 
D) aspartic acid 

3. A non protein amino acid:

A) Ornithine
B) Tyrosine

C) Proline
D) Arginine

4. Identify the amino acid, which are not involved in the building blocks of proteins:

1) Ornithine 2) Cystein 3) Citrulline 4) Methionine

A) 1 & 2 

B) 1 & 3 

C) 2 only 

D) 3 & 4

5. Translate the following amino acid sequence into one letter code

Val-Ile-Asn-Glu-Leu-Val-Ile-Ser-Ile-Ser-Leu-Ile-Gly-Ala-Ser-Gly-Ile-Asn-Leu-Ala-TYR- Val-Trp

A) VIAGLVISISLIGASGIALAYVT

B) VINELVISISLIGASGINLAYVW

C) VINGLVISISLIGASGINLATVR

D) VINELVISISLIGASGINLAYVT

6. Which biomolecules simply refers as 'Staff of life' in the given macromolecules?

A) nucleic acids

B) carbohydrates

C) lipid

D) proteins

7. --- is the sugar molecule present in fruits

A)Fructose

B) Lactose

C) Sucrose

D) Galactose

8. Identify the subunits in the heteropolysaccharide Keratin sulphate.

A) D-glucuronic acid and N-acetyl galactosamine-4-sulphate

B) D-glucuronic acid and N-acetyl glucosamine

C) L-iduronic acid and N-acetyl galactosamine-4-sulphate

D) D-galactose and N-acetyl glucosamine-6-sulphate

9.The positions of double bond in linolenic acid are

A) 1 and 9

B) 2, 9 and 12

C) 9, 12 and 15

D) 5, 8, 11 and 14

10. Major fatty acid present in coconut oil is:  

A) lauric acid 

B) caproic acid 

C) stearic acid 

D) oleic acid 

11. Which of the following compounds are classified as lipids?

1. Polysaccharides  2.Triglycerides 3. Steroids  4. Enzymes  5. Eicosanoids

A) 1, 2, 3, and 4 only 

B) 1,4 and 5 only

C) 2,3 and 5 only

D) 1,3 and 5 only

12. Fructose is the energy source for sperms and is produced by the action of: 

A) Glucose dehydrogenase and isomerase 

B) Sucrose dehydrogenase and isomerase 

C) Aldose reductase and sorbitol dehydrogenase 

D) None of these

13. Osazone test can be used for distinguishing: 

A) Sucrose and starch 

B) Starch and glycogen 

C) Fructose and lactose 

D) Glucose and fructose

14. In men, the lipoprotein fraction with highest cholesterol contents is

A) α- lipopreotein 

B) β- lipoprotein

C) Chylomicrons

D) Prealbumin

Answers:

1. B) Alanine

2. C) cysteine 

3. A) Ornithine

4. B) 1 & 3 

5. B) VINELVISISLIGASGINLAYVW

6. B) carbohydrates

7. A)Fructose

8. D) D-galactose and N-acetyl glucosamine-6-sulphate

9. C) 9, 12 and 15

10.A) lauric acid 

11. C) 2,3 and 5 only

12. C) Aldose reductase and sorbitol dehydrogenase 

13. C) Fructose and lactose 

14. B) β- lipoprotein