Biology MCQs

Page No. 42

The percentage of light absorbed by the leaf is ___________?


a20%


b15%


c10%


d1%


View Answer 1%

Visible light used in photosynthesis ranges from:__________?


a300 – 700 nm in wavelength


b350 – 750 nm in wavelength


c380 – 750 nm in wavelength


d390 – 790 nm in wavelength



PS I has chlorophyll a molecule which absorbs maximum light of _________ nm ?


a600


b650


c680


d700


View Answer 700

Van neil hypothesis about the production of oxygen during phosynthesis was based on the study and investigations on___________?


aBacteria


bAlgae


cProtenema


dCyanobacteria


View Answer Bacteria

Air contains __________ % of CO2 ?


a0.02-0.03


b0.03-0.04


c0.04-0.05


d0.05-0.06


View Answer 0.03-0.04

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


aNeutral point


bCompensation point


cParallel point


dCompetitive point


View Answer Compensation point

Net yield of H2O in Photosynthesis is__________?


a1 molecule


b6 molecules


c3 molecules


d0 molecule


View Answer 0 molecule

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


a10%


b20%


c30%


d40%


View Answer 10%

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


aGlycolysis


bRespiration


cPhotosynthesis


dKreb’s cycle


View Answer Photosynthesis

Carotenoids perform protective function in_____________?


aAnimals


bPlants


cBoth of these


dNone of these


View Answer Both of these

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