Multiple Choice
How do the R groups (side chains) of amino acids contribute to the overall structure of a protein?
20
views
3. Amino Acids
Amino Acid Groups
Struggling with Biochemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which functional group is present in every amino acid?
A
Methyl group (\(-CH_3\))
B
Phosphate group (\(-PO_4^{2-}\))
C
Amino group (\(-NH_2\))
D
Hydroxyl group (\(-OH\))
Verified step by step guidance1
Step 1: Understand the structure of amino acids. Amino acids are the building blocks of proteins and have a central carbon atom (called the alpha carbon) bonded to four groups: an amino group (
), a carboxyl group (
), a hydrogen atom, and a variable side chain (R group).
Step 2: Analyze the functional groups listed in the problem. The methyl group (
), phosphate group (
), and hydroxyl group (
) are not universally present in all amino acids.
Step 3: Identify the functional group that is common to all amino acids. The amino group (
) is a defining feature of amino acids and is present in every amino acid structure.
Step 4: Relate the amino group to the name 'amino acid.' The term 'amino acid' itself indicates the presence of an amino group (
) and a carboxyl group (
).
Step 5: Conclude that the amino group (
) is the correct answer because it is universally present in all amino acids, unlike the other functional groups listed.
Related Videos
Related Practice
Amino Acid Groups practice set
Problem sets built by lead tutorsExpert video explanations