set 4 MCQ Questions & Answers Detailed Explanation

Question : 1

Photosynthetically active radiation is represented by the range of wavelength of

a) 400 – 700 nm

b) 500 – 600 nm

c) 340 – 450 nm

d) 400 – 950 nm

Question : 2

During strenuous exercise, glucose is converted into

a) pyruvic acid

b) glycogen

c) starch

d) lactic acid

Question : 3

Consider the following statements :

1. Aerenchyma tissue are found in hydrophytes.
2. Number of stomata is less and sunken in xerophyte.
3. Velamen tissue in orchids are found in root.

a) 2 only

b) 1, 2 and 3

c) 3 only

d) 1 only

Question : 4

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

Question : 5

In expiration, diaphragm becomes

a) relaxed

b) flattened

c) straightened

d) arched

Question : 6

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