Which codon is the code for the amino acid histidine (His) Messenger
Second base in codon
RNA Codons
U
С
A
G
UUU UCU
Phel
UAU UGU U
UUC)
UCC UAC)
Tyr
U
UGC)
Cys
Ser
C
UUA UCA
Leu
UAA Stop UGA Stop A
UUG
UCG
UAG Stop UGG Trp G
CUU CCU
CAU
U
CGU
CUC ССС
His
CAC) CGC
Leu Pro
с
CCA
Arg
CAA1
CUG
CGA
Gin
CCG CAG CGG
AUU ACU
AAU
AUC)lle ACC
Asn Ser
AAC) AGC
Thr
AUA
ACA AAA
AUG Start Me ACG
AGA
Lys Arg
AAG AGG
GUU GCU GAU1 GGU
GUC GCC
Asp
GAC) GGC
G
Val
Ala
GUA
GCA
Gly
GAA
Glu
GGA
GUG
GCG GAG) GGG
First base in codon
CUA
Third base in codon
AGU
A. CAA
B. UAC
Ο Ο Ο Ο
C. AAC
D. CAU

Methionine is specified by the codon AUG, which is also known as the start codon. Consequently, methionine is the first amino acid to dock in the ribosome during the synthesis of proteins. Tryptophan is unique because it is the only amino acid specified by a single codon.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.