Energy is required for:

(A) Active transport
(B) Facilitated transport
(C) Diffusion
(D) All of these

Answer: (A) Active transport
Energy is required for active transport.

Virus is nutritionally_______ .

(A) Symbiont
(B) Facultative parasite
(C) Saprophyte
(D) Obligate parasite

Answer: (D) Obligate parasite
Virus is nutritionally obligate parasite.