Biology Mcqs

Molecular formula of chlorophyll b is_____________?

(A) C55 H10 O4 N6 Mg

(B) C55 H70 O6 N5 Mg

(C) C55 H71 O6 N4 Mg

(D) C55 H70 O6 N4 Mg

Submitted By: Ali Uppal


At which times there is no net gaseous exchange between leaves and the atmosphere.

(A) Day time.

(B) Night time.

(C) Dawn & Dusk.

(D) Mid night.

Submitted By: Ali Uppal


Bacteriochlorophylls does not include________________?

(A) Chlorophyll e

(B) Chlorophyll d

(C) Chlorophyll a

(D) Chlorophyll c

Submitted By: Ali Uppal


C6H12O6 + 6O2 ? 6CO2 + 6H20 + ENERGY represents:____________?

(A) Photosynthesis

(B) Aerobic respiration

(C) Anaerobic respiration

(D) Respiration

Submitted By: Ali Uppal


Submitted By: Ali Uppal


The first action spectrum was obtained by___________?

(A) T.W.Englemam

(B) Malleus

(C) T.W.Inws

(D) W.Stapes

Submitted By: Ali Uppal


Which of the following light is least absorbed by the plants?

(A) Orange

(B) Red

(C) Blue

(D) Green

Submitted By: Ali Uppal


Submitted By: Ali Uppal


Visible light used in photosynthesis ranges from:__________?

(A) 300 – 700 nm in wavelength

(B) 350 – 750 nm in wavelength

(C) 380 – 750 nm in wavelength

(D) 390 – 790 nm in wavelength.

Submitted By: Ali Uppal


Submitted By: Ali Uppal