Concanavalin A is

a pigment

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an alkaloid

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an essential oil

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a lectin

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Solution

The correct option is D a lectin
Pigments, alkaloids, essential oils and lectins are secondary metabolites produced by plants. Their role in plants is little understood, however some of them have ecological importance.

Lectins are carbohydrate-binding proteins and Concanavalin A (Con A) is a plant lectin that is purified from jack beans.

Suggest Corrections

List A	List B
(A) Abrin	(i) Lectin
(B) GLUT-4	(ii) Intercellular ground substance
(C) Collagen	(iii) Hormone
(D) Concanavalin	(iv) Enables glucose transport into cells
	(v) Toxin

$(a)$	Abrin	$(i)$	Lectin
$(b)$	GLUT-4	$(i i)$	Intercellular growth substance
$(c)$	Collagen	$(i i i)$	Hormone
$(d)$	Concanavalin	$(i v)$	Enables glucose transport into cells
		$(v)$	Toxin

List A	List B
(A) Abrin	(i) Lectin
(B) GLUT-4	(ii) Intercellular ground substance
(C) Collagen	(iii) Hormone
(D) Concanavalin A	(iv) Enables glucose transport into cells
	(v) Toxin