One triplet in an mRNA molecule has the base sequence CCG. The table
below can be used to figure out which amino acid this base sequence causes
a protein to have
CUA
CCA
Messenger
Second base in codon
RNA Codons
U
с
А
G
UUU UCU JUAU UGUT U
Phe
UUC UCC UAC
Tyr
UGC
UUA
UCA
Ser
UAA SIO UGA SA
Leu
UUG UCG UAG Stop UGOTIPO
CUU
CCU CAU
U
CGU
CUC cec
His
CAC
С
Lou
CGC
Pro
|CAA
Arg
CGA
G
CUG
A
CCG CAG CGG
AUU ACU
As
ACC
U
Ser
A
The
C
AUA JACA ANA AGA
Aro A
AUGACG AAG
GUU GCU GAU GGU
GUC GCC GAC) AND GGC
GUA
Val
AL
GCA
Gly
GUG
GGA
G
IGCG GAG) GGG
GCA
Lys AGG) Ang
GAA
According to the table, which of these triplets contains a change to CCG that
is a missense mutation?
A. CGG
В. ССС
C. CCA
OD. CCU
SUBMIT

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