Return to Blog Homepage

MCAT Biology Question — Amino Acids: Peptide Bond

  • by John
  • Jun 16, 2014
  • MCAT Biology, MCAT Blog, MCAT Question of the Day

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

amino acids

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 MCAT practice?

We’ve got options for every schedule and learning style!

From the best online MCAT course created by top instructors with 524+ MCAT scores to the most representative full-length practice exams and private tutoring, we can custom tailor your MCAT prep to your goals!

Not sure which option is right for you? Schedule a free MCAT consultation with an MCAT Advisor using the form below. No obligation, just expert advice.

Schedule My Free Consultation

Submit a Comment