Because gelatin is missing the amino acid tryptophan, it is called
A. a complete protein.
B. a digestible protein.
C. an incomplete protein.
D. a plant protein.
Question 2
The percentage of animal protein that is digestible is
A. 60 to 75 percent.
B. 75 to 80 percent.
C. 80 to 90 percent.
D. 90 to 99 percent.