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NEET BIOLOGYMedium

Given below are two statements: Statement I: RuBisCO is the most abundant enzyme in the world. Statement II: Photorespiration does not occur in C4 plants. In the light of the above statements, choose the most appropriate answer from the options given below:

A

Statement I is correct but Statement II is incorrect

B

Statement I is incorrect but Statement II is correct

C

Both Statement I and Statement II are correct

D

Both Statement I and Statement II are incorrect

Step-by-Step Solution

According to the text:

  • Statement I is Correct: RuBisCO (Ribulose bisphosphate Carboxylase-Oxygenase) is explicitly stated to be the most abundant enzyme in the world (Source 103) and the most abundant protein in the whole of the biosphere (Source 67).
  • Statement II is Correct: The text states that in C4 plants photorespiration does not occur (Source 105). This is because they have a mechanism (C4 pathway) that increases the intracellular concentration of CO2 at the enzyme site, ensuring RuBisCO functions as a carboxylase rather than an oxygenase.
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