Reading the definitions

Exercise and reference answers

Questions

1. Question

   The carbon carrying both groups is called the

   Choices

   1. β-carbon
   2. α-carbon
   3. γ-carbon

   Correct choice

   α-carbon

2. Question

   How many amino acids occur in proteins?

   Choices

   1. ten
   2. a hundred
   3. twenty

   Correct choice

   twenty

3. Question

   An amino acid's properties come from the amino, carboxyl and

   Choices

   1. R group
   2. phosphate group
   3. sugar

   Correct choice

   R group

4. Question

   Amino acids are structurally described as substituted

   Choices

   1. benzenes
   2. methanes
   3. alcohols

   Correct choice

   methanes

Explanation