set 4 MCQ Questions & Answers Detailed Explanation

Question : 1

Which of the following statements are wrong?

1. Leucocytes disintegrate in the spleen and liver.
2. RBC, WBC and blood platelets are produced in bone marrow.
3. Neutrophils bring about destruction and detoxification of toxins of protein origin.
4. The important function of lymphocytes is to produce antibodies.

a) 1 and 3

b) 1 and 4

c) 1 and 2

d) 2 and 3

Question : 2

In PS-I the reaction centre Chl a has absorption maxima at _____________, while in PS-II the reaction centre Chl a has absorption maxima at ___________.

a) P₇₀₀, P₆₈₀

b) P₈₀₀, P₆₀₀

c) P₆₈₀, P₇₀₀

d) P₇₀₀, P₉₀₀

Question : 3

In expiration, diaphragm becomes

a) relaxed

b) flattened

c) straightened

d) arched

Question : 4

Which element is required in comparatively least quantity for the growth of plant?

a) N

b) P

c) Zn

d) Ca

Question : 5

Bones are mainly made up of

a) calcium and sulphur

b) calcium and phosphorous

c) calcium and magnesium

d) calcium and iron

Question : 6

Hydroponics is a technique in which plants are grown in

a) water saturated sand

b) balanced nutrient solution

c) green house

d) purified distilled water