Multiple Choice
A protein's conformation is formed through all but which of the following?
6. Proteins
Protein Basics
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A protein C-terminus is named that way because it contains what molecule?
A
An extra carbon
B
A COOH group
C
A CH3 group
D
A Chloride
Verified step by step guidance1
Understand the structure of amino acids, which are the building blocks of proteins. Each amino acid has an amino group (NH2), a carboxyl group (COOH), a hydrogen atom, and a variable R group attached to a central carbon atom.
Recognize that proteins are formed by linking amino acids together through peptide bonds, which occur between the carboxyl group of one amino acid and the amino group of the next.
Identify the two ends of a protein chain: the N-terminus, which has a free amino group, and the C-terminus, which has a free carboxyl group.
Recall that the C-terminus of a protein is named for the presence of the carboxyl group (COOH) at the end of the polypeptide chain.
Conclude that the C-terminus is characterized by the presence of a COOH group, which is why it is named as such.
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