Viral envelopes are sometimes made of fats and what?\nOptions:\n- (A) cellulose\n- (B) glucose\n- (C) Energy.\n- (D) protein\n- (E) viral particles\n- (F) Energy\n- (G) food\n- (H) bacteria
A step-by-step solution is:
(D)
Some viruses have an envelope of phospholipids and proteins.

Phospholipids are body fats, too.

Some viruses have an envelope of fats and proteins.

.

The answer: (D)