Which element is the constituent of thiamine, biotin, CoA and ferredoxin?

Iron

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Sulphur

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Boron

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Magnesium

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Solution

The correct option is B Sulphur
Sulphur is one of the essential mineral elements required by the plants. Plants absorb sulphur from the soil in the form of sulphate ions ( $S O_{4}^{2 -}$ ). It is required by young leaves and meristems. It is a constituent of vitamins like, thiamine and biotin, coenzyme-A (CoA) and ferredoxin. These are involved in various metabolic activities of plants. Sulphur is also a constituent of two amino acids methionine and cysteine.

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Similar questions

Deficiency of _______ in plants causes symptoms similar to deficiency of nitrogen. It also is a component of thiamine, biotin and CoA.

The deficiency of a mineral, which is a component of thiamine, biotin & Co A in plants may show nitrogen deficiency symptom. Name the mineral

(a)	Zn	(i)	Required for formation of mitotic spindle
(b)	Ca	(ii)	Constituent of biotin
(c)	S	(iii)	Constituent of nucleic acid
(d)	N	(iv)	Required for synthesis of auxin

	A	B	C
	Mineral	Deficiency symptoms	Importance
a	Potassium	(i) Leaves turn dark green	(I) Regulation of stomatal pore
b	Sulphur	(ii) Accumulation of purple pigment	(II) Constituent of Chlorophyll
c	Magnesium	(iii) Wilting and dropping of leaves	(III) Required for activity of oxidoreductase
d	Copper	(iv) Old leaves start to die	(IV) Essential for carboxylase enzyme
		(v) Shortening of inter-node	(V) It is constituent of thiamine

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