set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

Which of the followings organelles having single membrane bound structures ?

1. Endoplasmic reticulum
2. Golgi bodies
3. Mitochondria
4. Plastids

a) 3 and 4

b) 2 and 4

c) 1 and 2

d) 1, 2, 3 and 4

Question : 2

Biological catalysts in living organisms are known as

a) vitamins

b) hormones

c) steroids

d) enzymes

Question : 3

The hormone reducing transpiration rate by inducing stomatal closure is

a) ethylene

b) cytokinin

c) ABA

d) auxin

Question : 4

In which of the following reptiles four chambered heart is present ?

a) Snake

b) Lizard

c) Scorpion

d) Crocodile

Question : 5

Cavity or lumen is narrow in

a) Parenchyma

b) Sclerenchyma

c) Collenchyma

d) Tracheids