10th class Chemistry, Chapter 25: Biochemistry MCQs

1. Functional groups present in fructose are:

1. (A) Hydroxyl and aldehyde
2. (B) Hydroxyl and Ketone ✓
3. (C) Hydroxyl and ester
4. (D) Hydroxyl and amide

2. Which functional group is present in a fat?

1. (A) Carboxyl group
2. (B) Ester group ✓
3. (C) Carbonyl group
4. (D) Hydroxyl group

3. Which function is not performed by proteins in our body?

1. (A) They serve as chemical messengers.
2. (B) They serve as storage of energy-rich fuel.
3. (C) They store genetic information. ✓
4. (D) They serve as catalysts for biochemical reactions.

4. Which functional groups react to produce a peptide linkage in proteins?

1. (A) Carboxyl group and hydroxyl group
2. (B) Carboxyl group and amino group ✓
3. (C) Hydroxyl group and amino group
4. (D) Ester group and amino group

5. The test performed to detect cancer in early stages is:

1. (A) Genetic test
2. (B) Urine test
3. (C) Galleri test ✓
4. (D) Electrolyte test

6. Fatigue and depression are caused by deficiency of:

1. (A) Vitamin A
2. (B) Vitamin C
3. (C) Vitamin D
4. (D) Vitamin B1 ✓

7. Biochemistry is the study of chemical substances which play a vital role in processes taking place in:

1. (A) rocks
2. (B) stars
3. (C) machines
4. (D) living organisms ✓

8. The three classes of foods are carbohydrates, lipids and:

1. (A) proteins ✓
2. (B) water
3. (C) vitamins
4. (D) minerals

9. On the average lipids provide ____ as much energy as carbohydrates or proteins.

1. (A) equal
2. (B) thrice
3. (C) twice ✓
4. (D) half

10. Butter and ghee are special animal fats made from:

1. (A) milk ✓
2. (B) fish
3. (C) eggs
4. (D) meat

11. The main source of energy for the human body is:

1. (A) carbohydrates ✓
2. (B) minerals
3. (C) water
4. (D) vitamins

12. A healthy adult needs ____ of proteins per day.

1. (A) 20 g
2. (B) 40 g
3. (C) 60 g ✓
4. (D) 100 g

13. Daily intake of fats for an adult is roughly:

1. (A) 10 to 20 g
2. (B) 44 to 78 g ✓
3. (C) 100 to 200 g
4. (D) 300 g

14. A healthy adult needs ____ of carbohydrates per day for a 2000 calorie diet.

1. (A) 25 to 35 g
2. (B) 125 to 150 g
3. (C) 225 to 325 g ✓
4. (D) 500 g

15. A balanced diet prevents diseases such as:

1. (A) heart disease, diabetes and osteoporosis ✓
2. (B) fever only
3. (C) cold only
4. (D) broken bones

16. Carbohydrates contain the elements carbon, hydrogen and:

1. (A) nitrogen
2. (B) oxygen ✓
3. (C) sulphur
4. (D) chlorine

17. Carbohydrates are commonly called sugars because of the ____ of some of them.

1. (A) colour
2. (B) sweet taste ✓
3. (C) smell
4. (D) hardness

18. Glucose is also called:

1. (A) grape sugar or dextrose ✓
2. (B) malt sugar
3. (C) cane sugar
4. (D) milk sugar

19. Glucose is an ____ sugar.

1. (A) aldehydic ✓
2. (B) amide
3. (C) ketonic
4. (D) acidic

20. Fructose is a ____ sugar.

1. (A) ketonic ✓
2. (B) aldehydic
3. (C) amide
4. (D) acidic