MCAT Biology Question — Amino Acids: Peptide Bond | Next Step Test Prep MCAT Biology Question — Amino Acids: Peptide Bond | Next Step Test Prep

Fields marked with an * are required

Schedule a Free Tutoring Consultation

A Next Step Academic Manager will contact you within 1 business day or call us now at 888-530-6398.

Contact us

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Which structure shows two amino acids linked by 1 peptide bond?

Explanation

Amino acids are joined by a peptide bond: 1) the leading amino acid has a primary amine group to the left, 2) the peptide bond has a carbonyl group immediately following the first amino acid side chain, 3) bonded to a secondary amine leading the second amino acid side chain, and 4) the second amino acid finishes with a carboxylic acid group. Choice d) is correct.

A) incorrect, Leads and ends with a carboxylic acid group.

B) incorrect, Leading amine has five bonds.

C) incorrect, Leads and ends with an amine group.

D) correct.

Want more practice?

Fields marked with an * are required

Sign up for our MCAT Question of the Day!

X