Question

Find the correct combination.
(A) DCMU...........Herbicide...........Inhibitor of non-cyclic electron transport
(B) PMA..........Fungicide...............Reduces transpiration
(C) Colchicine...........Alkaloid..............Causes male sterility
(D) Solnite-Sodium alginate..........Encapsulation of somatic embryos.

• A. $a,b$
• B. $a,c$
• C. $b,c$
• D. $b,d$

Answer 1

The correct option is A $a,b$

DCMU (dichlorophenyl)-1,1-dimethylurea) is a herbicide which kills algae and hence inhibits photosynthesis. It acts by inhibiting non-cyclic electron transport system. It has no effect on cyclic electron transport system. PMA (Phenylmercuric acetate) is a fungicide. It acts as antitranspirants by closing the stomata. It reduces transpiration rate. Colchicine is an alkaloid. It causes male infertility and not sterility. Encapsulation of somatic embryos is done by using sodium alginate and calcium chloride.

Thus, the correct answer is 'a,b'.