Join thousands of students who trust us to help them ace their exams!Watch the first video
Multiple Choice
Which two groups are bound to the central carbon of every free amino acid monomer?
A
Carbonyl group and aldehyde group
B
Hydroxyl group and phosphate group
C
Amino group and carboxyl group
D
Methyl group and sulfhydryl group
Verified step by step guidance
1
Begin by understanding the basic structure of an amino acid. Each amino acid has a central carbon atom, known as the alpha carbon.
Identify the four groups that are typically bound to the alpha carbon in an amino acid: the amino group, the carboxyl group, a hydrogen atom, and a variable R group (side chain).
Focus on the amino group and the carboxyl group. The amino group consists of a nitrogen atom bonded to hydrogen atoms, typically represented as NH₂.
Examine the carboxyl group, which is composed of a carbon atom double-bonded to an oxygen atom and single-bonded to a hydroxyl group, typically represented as COOH.
Recognize that these two groups, the amino group and the carboxyl group, are essential components of the structure of every free amino acid monomer, distinguishing them from other chemical groups listed in the options.