Question

1. there are ____________ essential amino acids.

3
5
7
9

1. in general, as the percentage of triglyceride drops, the density of lipoprotein increases.

true
false

1. worldwide, approximately ____________ percent of protein in the diet comes from animals.

35
50
70
85

Explanation:

• For question 21: Humans cannot synthesize 9 essential amino - acids and must obtain them from diet.
• For question 22: Lipoproteins with lower triglyceride content are denser.
• For question 23: Approximately 35 percent of dietary protein globally comes from animals.

Answer:

1. D. 9
2. A. True
3. A. 35