Assertion : Deficiency of sulphur causes chlorosis in plants. Reason : Sulphur is a constituent of…

Assertion : Deficiency of sulphur causes chlorosis in plants. Reason : Sulphur is a constituent of chlorophyll, proteins and nucleic acids.
  1. If both assertion and reason are true and reason is the correct explanation of assertion
  2. If both assertion and reason are true but reason is not the correct explanation of assertion
  3. If assertion is true but reason is false
  4. If both assertion and reason are false.

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.

Asked in: NEET 2015 (Phase 2)

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