Question

The active site of an enzyme is situated in its amino acids _________ .

• A. Amino groups
• B. Carboxyl groups
• C. R-groups
• D. All the above

Answer 1

The correct option is C R-groups

• The active site is the part of an enzyme to which substrates bind and where a reaction is catalyzed.
  
• The active site of an enzyme is situated in its amino acid's R groups.

So, the correct option is 'R-groups'.