chapter 5 MCQs 10th Class Chemistry

Biochemistry:

1. General formula of carbohydrates is:

a. C_n(H₂O)_n
b. C_n-1(H₂O)_n
c. C_n(HO)_n
d. C_n(H₂O)_n-1

a. C_n(H₂O)_n

2. Which simple sugar cannot be hydrolyzed?

a. Starch
b. Glucose
c. Cellulose
d. Sucrose

b. Glucose

3. Lactose is a type of sugar, it consists of sugar and ………:

a. Starch
b. Sucrose
c. Galactose
d. Maltose

c. Galactose

4. In which part of digestive system glucose is absorbed?

a. Small intestine
b. Stomach
c. Large intestine
d. Liver

a. Small intestine

5. Which of the following is pentahydroxy aldehyde?

a. Fructose
b. Starch
c. Sucrose
d. Glucose

d. Glucose

6. Which of the following is tri saccharide?

a. Lipids
b. Carbohydrates
c. Vitamins
d. Proteins

b. Carbohydrates

7. Which of the following is pure cellulose?

a. Bread
b. Maize
c. Wheat
d. Rice

a. Bread

8. Which of the following is crystalline solid?

a. Cellulose
b. Glucose
c. Glycogen
d. Starch

b. Glucose

9. Mono saccharides consists of ……… carbon atoms:

a. Three to nine
b. Two to four
c. Five to ten
d. Four to eight

a. Three to nine

10. Which of the following does not contain starch?

a. Barley
b. Sugarcane
c. Potatoes
d. Maize

b. Sugarcane

11. Pentahydroxy ketone is called:

a. Sucrose
b. Glucose
c. Fructose
d. Starch

c. Fructose

12. Chemical formula of fructose is:

a. C₄H₁₀
b. C₁₂H₂₂O₁₁
c. C₅H₁₂
d. C₆H₁₂O₆

d. C₆H₁₂O₆

13. Which protects us from muscle cramping?

a. Vitamins
b. Proteins
c. Carbohydrates
d. Lipids

c. Carbohydrates

14. Amino acids are linked to each other through:

a. Gelatin link
b. Hydrogen link
c. Peptide link
d. Ionic link

c. Peptide link

15. Gelatin protein is present in:

a. Heart
b. Blood
c. Bones
d. Skin

c. Bones

16. Polymers of amino acids are:

a. Vitamins
b. Carbohydrates
c. Lipids
d. Proteins

d. Proteins

17. Proteins are ……… by weight of cell:

a. 65%
b. 40%
c. 50%
d. 35%

c. 50%

18. The body reactions are catalyzed by:

a. Enzymes
b. Amino acids
c. Fatty acids
d. Lipids

a. Enzymes

19. The chemical formula of citric acid is:

a. C₁₇H₃₇COOH
b. C₁₇H₃₅COOH
c. C₁₅H₃₁COOH
d. C₁₇H₃₃COOH

b. C₁₇H₃₅COOH

20. Building blocks of lipids are:

a. Fatty acids
b. Nucleic acids
c. Mono saccharides
d. Amino acids

a. Fatty acids

21. The formula of palmitic acid is:

a. C₁₅H₃₂COOH
b. C₁₅H₃₁COOH
c. C₁₇H₃₆COOH
d. C₁₇H₃₅COOH

b. C₁₅H₃₁COOH

22. Catalyst used in the hydrogenation of vegetable oil is:

a. Ni
b. Al
c. Pb
d. Cu

a. Ni

23. Which scientist discovered the structure of DNA?

a. Watson and Crick
b. Hopkins
c. Robert Hook
d. John Dalton

a. Watson and Crick

24. Vitamins B complex contains:

a. 6 vitamins
b. 10 vitamins
c. 12 vitamins
d. 8 vitamins

b. 10 vitamins

25. Deficiency of vitamin D causes:

a. Anemia
b. Rickets
c. Night blindness
d. Scurvy

b. Rickets

26. Who proposed the name of vitamin?

a. F Crick
b. Funk
c. Lewis
d. Watson

b. Funk

27. Rickets disease is caused by the deficiency of:

a. Vitamin E
b. Vitamin D
c. Vitamin C
d. Vitamin A

b. Vitamin D

28. Who invented vitamin B (Thiamin)?

a. J Watson
b. Hopkins
c. Davy
d. Funk

d. Funk

29. ……… is caused by the deficiency of vitamin A:

a. Rickets
b. Night blindness
c. Both a and b
d. Sore eyes

b. Night blindness

30. Fat soluble vitamin is:

a. K
b. A
c. E
d. All

d. All

31. Hopkins noticed for the first time:

a. Lipids
b. Carbohydrates
c. Vitamins
d. Proteins

c. Vitamins

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10th class chemistry unit 5 MCQs