physiology of plants, humans and animals - Category wise Question and Answer Practice Test with Solutions

Question : 11

Which one of the following organs in the human body is most affected due to shortage of oxygen?

a) Skin

b) Intestine

c) Kidney

d) Brain

Question : 12

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 : 13

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 : 14

In expiration, diaphragm becomes

a) relaxed

b) flattened

c) straightened

d) arched

Question : 15 [IAS (Pre) 2007]

Which one of the following parts of the human brain is the regulating centre for swallowing and vomiting?

a) Cerebrum

b) Medulla oblongata

c) Cerebellum

d) Pons