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Unit#13: Biochemistry

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Question 1 of 20 0% read

1. Which lipid forms cell membranes?

A Triglycerides
B Steroids
C Phospholipids
D Waxes

2. Which nutrient is required in small amounts?

A Carbohydrates
B Proteins
C Fats
D Vitamins

3. Which nutrient is essential for enzyme formation?

A Proteins
B Carbohydrates
C Lipids
D Water

4. Metabolism refers to:

A Digestion only
B All chemical reactions in body
C Respiration only
D Excretion only

5. Enzymes are chemically:

A Carbohydrates
B Proteins
C Lipids
D Vitamins

6. Enzymes speed up reactions by:

A Increasing temperature
B Lowering activation energy
C Changing products
D Increasing pressure

7. Which factor affects enzyme activity?

A Temperature
B pH
C Substrate concentration
D All of these

8. Which nutrient deficiency causes night blindness?

A Vitamin A
B Vitamin B
C Vitamin C
D Vitamin D

9. Which biomolecule stores energy for long-term use?

A Carbohydrates
B Proteins
C Lipids
D Enzymes

10. Which biomolecule is made of glycerol and fatty acids?

A Proteins
B Carbohydrates
C Lipids
D Enzymes

11. Which biomolecule is the main source of energy for the body?

A Proteins
B Lipids
C Carbohydrates
D Vitamins

12. Which enzyme breaks down starch into maltose?

A Lipase
B Protease
C Amylase
D Pepsin

13. Which enzyme digests fats?

A Protease
B Amylase
C Lipase
D Pepsin

14. Which sugar is present in table sugar?

A Glucose
B Fructose
C Sucrose
D Lactose

15. Which vitamin is fat-soluble?

A Vitamin B
B Vitamin C
C Vitamin A
D Vitamin B12

16. Which nutrient helps in absorption of fat-soluble vitamins?

A Proteins
B Carbohydrates
C Lipids
D Minerals

17. Which biomolecule acts as catalyst in biological reactions?

A Lipids
B Carbohydrates
C Enzymes
D Vitamins

18. Which enzyme digests proteins in stomach?

A Trypsin
B Amylase
C Pepsin
D Lipase

19. Lipids are insoluble in:

A Alcohol
B Ether
C Chloroform
D Water

20. Starch is an example of:

A Disaccharide
B Monosaccharide
C Polysaccharide
D Protein

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