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Question

Biology Question on Photosynthesis in higher plants

Consider the following statements regarding photosynthesis and respiration in plants and select the correct option I) RuBisCO has high affinity to oxygen in low CO2CO_2 concentration II)The Calvin pathway occurs in the chloroplast of bundle sheath cells of C4C_4 plants III) Yeast poison themselves when the concentration of alcohol reaches 7%7\% IV) Oxygen is a final hydrogen acceptor during aerobic respiration

A

Statements I & III are correct, II is wrong

B

Statements I & IV are correct, III is wrong

C

Statements II & II are correct, I is wrong

D

Statements I & II are correct, IV is wrong

Answer

Statements I & IV are correct, III is wrong

Explanation

Solution

RuBiscO is an enzyme that acts as an oxygenase in low carbon dioxide concentration and acts as a carboxylase under high concentration of carbon dioxide. RuBisco binds with oxygen at high temperatures and low CO2:O2CO _{2}: O _{2} ratio and binds with carbon dioxide at low temperatures and high CO2:O2CO _{2}: O _{2} ratio.