section 9 MCQ Questions & Answers Detailed Explanation

Question : 1

Select the statement which does not occur during the process of photosynthesis.

1. Absorption of light energy by chlorophyll.
2. Conversion of chemical energy to light energy and splitting of water molecules into hydrogen and oxygen.
3. Oxidation of carbon dioxide to carbohydrates.

a) B and C

b) A and B

c) A and C

d) All of the above

Question : 2

Which one of the following is useful in the treatment of scurvy disease?

a) Gooseberry

b) Mango

c) Papaya

d) Ber

Question : 3

Which one of the following genetic diseases is sex-linked?

a) Cystic fibrosis

b) Royal haemophilia

c) Tay-Sachs disease

d) Hypertension

Question : 4

Due to unsafe drinking water and lack of Sanitation, three main communicable disease in developing countries are

a) Orchociasis, White blindness, Arthritis

b) Diarrhoea, Cancer, Gout

c) Malaria, Acute diarrhoea, Schistosomiasis

d) Rheumatism, Malaria, AIDS

Question : 5

Which of the following statements is/are correct? Viruses can infect

1. Bacteria
2. Fungi
3. Plants

a) Only 1 and 3

b) Only 1 and 2

c) Only 3

d) 1, 2 and 3

Question : 6

Consider the following statements.

1. Fatty acids should be a part of human diet.
2. A normal diet should contain 75 gm of fat.
3. The cells of human body can not synthesize any fatty acids.
4. Deficiency diseases develop due to the absence of essential fatty acids.

a) Only 2 and 3

b) 1, 2 and 4

c) 1, 2 and 3

d) Only 3 and 4