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Question: Answered & Verified by Expert
Assertion : Deficiency of sulphur causes chlorosis in plants.
Reason : Sulphur is a constituent of chlorophyll, proteins and nucleic acids.
BiologyPhotosynthesis in Higher PlantsAIIMSAIIMS 2004
Options:
  • A If both assertion and reason are true and reason is the correct explanation of assertion
  • B If both assertion and reason are true but reason is not the correct explanation of assertion
  • C If assertion is true but reason is false
  • D If both assertion and reason are false.
Solution:
1540 Upvotes Verified Answer
The correct answer is: If assertion is true but reason is false
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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