Biology Mcqs

Submitted By: Ali Uppal


Air contains __________ % of CO2 ?

(A) 0.02-0.03

(B) 0.03-0.04

(C) 0.04-0.05

(D) 0.05-0.06

Submitted By: Ali Uppal


The point at which there is no net exchange of gases between leaves and atmosphere is known as_____________?

(A) Neutral point

(B) Compensation point

(C) Parallel point

(D) Competitive point

Submitted By: Ali Uppal


Net yield of H2O in Photosynthesis is__________?

(A) 1 molecule

(B) 6 molecules

(C) 3 molecules

(D) 0 molecule

Submitted By: Ali Uppal


Submitted By: Ali Uppal


Reduction in photosynthesis is of____________?

(A) O2

(B) CO2

(C) H2O

(D) light energy

Submitted By: Ali Uppal


Which of the following pigment is Blue- green in colour?

(A) Chlorophyll a

(B) Chlorophyll b.

(C) Chlorophyll c

(D) Chlorophyll d.

Submitted By: Ali Uppal


Stomata cover only ______________ of leaf surface?

(A) 0.03 – 0.04%

(B) 10%

(C) 1-2 %

(D) 50%

Submitted By: Ali Uppal


Molecular formula of chlorophyll ‘a’ molecule is___________?

(A) C55H72O5N4Mg

(B) C55H70O6N4Mg

(C) C50H72O6N4Mg

(D) C55H70O5N4Mg

Submitted By: Ali Uppal


Submitted By: Ali Uppal