BIOCHEMISTRY

BIOCHEMISTRY

1. The joining of separating units to form complex macromolecules is called

a. Polymorphism b. Polymerisation c. Aggregation d. Entropy

2. Percentage of N in cell is

a. 2 b. 2.5 c. 3 d. 18

3. Blood clotting is helped by

a. Na+ b. K+ c. Ca++ d. Mg++

4. Which is not a major element of animal body but must for cytochrome, haemoglobin and

myoglobin?

a. S b. Na c. Cl d. Fe

5. Sides of water molecules are

a. One side positive and other side negative b. Both sides are positive

c. Both sides are negative d. None of the above.

6. A compound in which C, H, O exists in 1: 2: 1 ratio is called

a. Nucleotide b. Nucleoside c. Carbohydrate d. Protein

7. Which group of sugar from the following cannot be hydrolysed?

a. Monosaccharides b. Oligosaccharides c. Di saccharides d. Polysaccharides

8. In human body all carbohydrates are absorbed in the form of glucose by a process called

a. Active transport b. Passive transport c. Pinocytosis d. Bulk transport

9. The change in optical rotation of a freshly prepared solution of glucose with time is called

a. Specific rotation b. Optical inversion c. Muta rotation d. None of these

10. Glucose is used

a. In the manufacture of vitamin C b. As preservative

c. In the manufacture of alcohol d. All of the above

11. Why sucrose and not glucose is used to preserve fruit products?

a. Glucose is reactive as it has CHO group b. Sucrose is more common in nature

c. Sucrose is easily available and has both glucose and fructose d. None of the above

12. Fats and their derivatives are called

a. Steroids b. Lipids c. Sterols d. Lipochondro

13. Bee wax is

a. Myricyl palmitate b. Myricyl cerotate c. Cetyl palmitate d. None of these

14. Which amino acid has no asymmetric carbon atom?

a. Glycine b. Alanine c. Proline d. Threonine

15. Boiled egg is an example

a. Solation b. Gelation c. Reversible colloid d. None of these

16. Which of the following fibres is the odd man out?

a. Cellulose b. Fibrin c. Collagen d. Keratin

17. Select the group having aromatic amino acids

a. Isoleucine, glycine, valine b. Glycine, tryprophan, creatine

c. Phenylalanine, tryptophan, tyrosine d. Methionine, cysteine, cystine.

18. With iodine solution, glycogen gives

a. Blue colour b. Red colour c. Black colour d. No colour

19. The fibrous protein is/are

a. Keratin b. Myosin c. Elastin d. All of these

20. Most abundant protein on earth is

a. Keratin b. rubisco c. RuBP d. Fibrinogen

21. Kwashiorkar is related with

a. Protein b. Fat c. Vitamins d. Essential fatty acids

22. Point out the odd one

a. Keratin b. Fibrin c. Chitin d. Myosin

23. Natural silk contains

a. K b. P c. N d. Mg

24. Nickel is component of enzyme

a. Nitrogenase b. Nitrate reductase c. Urease d. None of these

25. Phospholipids are

a. Amphipathic b. Amphibolic c. Hydrophobic d. None of these


ANSWERS

1. b 2. b 3. c 4. d 5. a 6. c 7. a 8. a 9. c 10. d

11. a 12. b 13. a 14. a 15. b 16. a 17. c 18. b 19. d 20. b

21. a 22. c 23. c 24. b 25. a