PORTAGE LEARNING 2026 PREMIUM EXAM
PREP VERIFIED QUESTIONS AND ANSWERS A+
◉ True or False: The following secondary structure shown below is an
example of an Antiparallel beta sheet.
True
False. Answer: False
◉ True or False. The side chain of phenylalanine is bonded to the
backbone nitrogen atom.
True
False. Answer: False
◉ True or False: The name of the molecule that binds to an enzyme is
called the ligand.
True
False. Answer: False
◉ True or False: An inhibitor that binds at the active site is an
uncompetitive inhibitor.
True
, False. Answer: False
◉ Which amino acids differ by only one atom?
Ser and Thr
Leu and Ile
Ala and Ser
Asp and Asn
Ser and Cys. Answer: Ser and Cys
◉ he formation of a peptide bond between two amino acids is an
example of a(n) _____ reaction.
Cleavage
Condensation
Group transfer
Isomerization
Double-bond breaking. Answer: Condensation
◉ The peptide Ala-Glu-Gly-Ala-Leu-Arg has ______ .
A disulfide bond
Five peptide bonds
Four peptide bonds
A proline residue