MCQ ON BIOMOLECULES (25 QUESTIONS WITH ANSWER) 23.08.2020

MCQ ON BIOMOLECULES (25 QUESTIONS WITH ANSWER) 23.08.2020

1.  The high boiling point of water is advantageous to living organisms because:

(a) the environment seldom reaches the boiling point of water 

(b) organisms can easily boil off enough water to keep themselves cool

(c) it allows organisms to spread heat evenly throughout their bodies 

(d) organisms can absorb a great deal of heat before they reach the boiling point.

2. Reducing sugars possesses:

(a) Aldehyde group (b) Ketonic group (c) Carboxylic group (d) Either (a) Or (b).

3. Chemically DNA differs from RNA by:

(a) Thymine present in DNA and cytosine present in RNA

(b) Ribose and thymine present in DNA and deoxyribose and uracil in RNA

(c) Ribose and uracil in DNA, Deoxyribose and Thymine in RNA 

(d) Deoxyribose in DNA and ribose RNA.

4.Which of the following is incorrect?

(a) Water molecule is non -polar

(b) Phosphorus and potassium are macronutrients 

(c) Ma++and Zn++ ane micronutrients

(d) Na+ and K+ maintain membrane potential, osmotic balance and fluid volume. 

5.Serotonin is derived in the body from the following amino acid:

(a) Phynyl  alanine 

(b) Histidine

c) Tryptophan       

D) Serine

6.The “free fatty acids” (FFA) of plasma are: 

(a) metabolically inert

(b) mainly bound to beta lipoproteins

(c) stored in fat

(d) mainly bound to serum albumin

7.Enzymes are mostly: 

(a) Globular proteins

(b) fibrous proteins

(c) structural proteins        

(d) nucleoproteins

8.Adenosine triphosphate (ATP) is a molecule of:

(a) Adenine linked through hexose deoxyribose sugar to three molecules of  Orthophosphoric acid

(b) Adenine linked through pentose deoxyribose sugar to three molecules of Orthophosphoric acid

(c) Adenine linked through ribose sugar to three molecules of Orthophosphoric acid

(d) None of the above.

9.The minerals that play important roles in the maintenance of fluid balance in the cellsare:

(a) Sodium and potassium

(b) Calcium and magnesium

(c) Calcium and phosphorus

(d) Iron and magnesium

10.A phospholipid lecithin contains:

(a) A fatty acid, an alcohol, a phosphate group and choline

(b) A fatty acid an alcohol 

(c) A fatty acid an alcohol a phosphate group

(d) A fatty acid, an alcohol and a phosphate group.

11. Wood and cotton contains large amount of:

(a) Lignin

(b) Chitin

(c) Cutin

(d) Cellulose 

12. Keratin sulphate is found in:

(a) Skin 

(b) Chlorophyll

(c) Cartilage

(d) Both (a) and (c)

13.Which one of the following is used in shatter-proof glass?

(a) Cellulose nitrate

(b) Cellulose acetate 

(c) Carboxylmethyl Cellulose

 

(d) Simple Cellulose

14.The hydrolysis of raffinose yields:

(a) Galactose

(b) Fructose

(c) Glucose

(d) All the above.

15 Which one of the following is the fibrous protein?

(a) Albumin

(b) Globulin

(c) Glutelin

(d) Collagen.

16. The sugar commonly present in fruits is:

(a) Glucose

(b) fructose

(c) Ribulose

(d) Xylulose.

17. Amylose, amylopecten and glycogen contain:

(a) Beta glucose

(b) Alpha glucose

(c) a and b

(d) Gamma glucose

18.  Proteins of silk fibred are examples of:

(a) Simple linear Proteins

(b) secondary pleated Proteins

(c) Tertiary folded Proteins

(d) Quartenary super folded Proteins 

19. Heme is derived form:

(a) Alanine 

(b) Serine

(c) Glycine

d) Cysteine.

20.  Which of the following is not a coenzyme?

(a) NAD

(b) FAD

(c) ATP

(d) FMN.

21. Which of the following is basic amino acid? 

(a) Aspartic 

(b) Amino

(c) Lysine

(d) Cysteine

22. A riboside is:

(a) Riboside + phosphate + base

(b) Riboside + base

(c) Riboside + phosphate

(d) base +phosphate.

23. Which of the following is not made up of monosaccharides?

(a) Sucrose

(b) Starch

(c) Insulin

(d) Glycogen

24. The DNA strands are antiparallel because of ?

(a) Hydrogen bonds   

(b) Disulphide bond

(c) phosphodiester bonds

(d) electrostatic bond

25. Protein nature of enzyme was first suggested by:

(a) Leeuwenhoek

(b) Sumner

(c) Pasteur

(d) Miller 

ANSWER

1.  (b)         2. (d)       3. (d)      4. (a)          5. (c)

6. (d)          7 (a)         8. (c)      9. (a)         10.  (a)

11. (d)        12 (d)       13. (b)     14 (d)      15.  (d)

16. (b)      17. (b)       18. (b)      19. (c)      20. (c)

21. (c)       22. (b)       23. (c)      24. (c)      25 (b)