PEPTIDES CODED FOR IN DNA EXAM QUESTIONS WITH VERIFIED SOLUTIONS PEPTIDES CODED FOR IN DNA EXAM QUESTIONS WITH VERIFIED SOLUTIONS

ESTUDYR


PEPTIDES CODED FOR IN DNA EXAM QUESTIONS WITH VERIFIED
SOLUTIONS PEPTIDES CODED FOR IN DNA EXAM QUESTIONS WITH
VERIFIED SOLUTIONS


UUU codes for:
A. Leucine
B. Valine
C. Phenylalanine
D. Serine
Answer: C. Rationale: UUU is one of the two codons (UUU, UUC) that encode phenylalanine in
the standard genetic code.

UUC codes for:
A. Tyrosine
B. Isoleucine
C. Phenylalanine
D. Methionine
Answer: C. Rationale: UUC is the second codon that specifies phenylalanine (synonymous with
UUU).

UCU codes for:
A. Cysteine
B. Serine
C. Proline
D. Glycine
Answer: B. Rationale: UCU is one of four serine codons (UCU, UCC, UCA, UCG) in the genetic
code.

UAU codes for:
A. Cysteine
B. Tyrosine
C. Stop
D. Histidine
Answer: B. Rationale: UAU (and UAC) encode tyrosine.

UGU codes for:
A. Tryptophan
B. Cysteine

, ESTUDYR


C. Leucine
D. Serine
Answer: B. Rationale: UGU and UGC specify cysteine.

UUA codes for:
A. Isoleucine
B. Leucine
C. Threonine
D. Lysine
Answer: B. Rationale: UUA is one of six leucine codons (UUA, UUG, CUU, CUC, CUA, CUG).

UUG codes for:
A. Methionine
B. Leucine
C. Valine
D. Glutamine
Answer: B. Rationale: UUG is another leucine codon (see rationale above).

UCC codes for:
A. Proline
B. Threonine
C. Serine
D. Arginine
Answer: C. Rationale: UCC is one of the serine codons in the UCU–UCG family.

UCA codes for:
A. Tyrosine
B. Serine
C. Phenylalanine
D. Histidine
Answer: B. Rationale: UCA is a serine codon (UCU, UCC, UCA, UCG).

UCG codes for:
A. Cysteine
B. Leucine
C. Serine
D. Tryptophan
Answer: C. Rationale: UCG completes the set of UCN serine codons.

UAC codes for:
A. Stop