Biology Mcqs

Net yield of H2O in Photosynthesis is__________?

A. 1 molecule
B. 6 molecules
C. 3 molecules
D. 0 molecule

About __________ % of photosynthesis is carried by terrestrial plants, while rest occurs in ocean, lakes, and ponds?

A. 10%
B. 20%
C. 30%
D. 40%

Of the following which one is not an energy releasing process?

A. Glycolysis
B. Respiration
C. Photosynthesis
D. Kreb’s cycle

Carotenoids perform protective function in_____________?

A. Animals
B. Plants
C. Both of these
D. None of these

The organisms able to use sunlight directly as a source of energy are_____________?

A. Plants
B. Animals
C. Omnivores
D. Fungi

Quantitative study of energy relationships in biological systems obeys.

A. Bioenergetics
B. Laws of thermodynamics
C. Laws of thermo chemistry
D. Laws of chemical energetic

Which of the following is a compensation point:

A. Leaves respire and utilize O2 and release CO2.
B. Photosynthesis and respiration occur at same rate. So there is not net exchange of gases between atmosphere and plants.
C. Rate of photosynthesis increases, so do the O2 production, with a net release of oxygen coupled with the uptake of CO2.
D. Rate of respiration becomes more than rate of photosynthesis.

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

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.

Bacteriochlorophylls does not include________________?

A. Chlorophyll e
B. Chlorophyll d
C. Chlorophyll a
D. Chlorophyll c