Q: Fact 1: Some viruses have an envelope of phospholipids and proteins. Fact 2: Phospholipids are body fats, too. Given the two facts above, viral envelopes are sometimes made of fats and what?

Select from the following. (1). cellulose (2). glucose (3). Energy. (4). protein (5). viral particles (6). Energy (7). food (8). bacteria
The answer is:
(4).