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NEET2004BotanyPhotosynthesis in Higher PlantsActual

Assertion : Deficiency of sulphur causes chlorosis in plants. Reason : Sulphur is a constituent of chlorophyll, proteins and nucleic acids.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion
  3. CIf assertion is true but reason is false
  4. DIf both assertion and reason are false.

Correct answer

C. If assertion is true but reason is false

Step-by-step solution

Sulphur is not a constituent of chlorophyll but it helps in chlorophyll formation. Due to the deficiency of sulphur, chlorosis often appears first in the young leaves. Mineral constituent of chlorophyll is magnesium which is situated in the centre of the porphyrin ring.

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