During a ribosome assembles a polypeptide whose amino acid sequence is specified by the nucleotide sequence in a molecule of mrna.
a. transcription
b. translation
c. replication
d. posttranscriptional modification

B. translation

Explanation:

The translation is the process wherein the nucleotide sequence of mRNA is read as triplet codons to make the proteins. The nucleotide sequence of mRNA specifies the amino acid sequence of the protein. Mature mRNA joins the ribosome to start the process of translation. During elongation, ribosome moves along the mRNA and tRNA carry the amino acids according to the nucleotide sequence of mRNA. The amino acids are joined together by peptide bonds and the product is called a polypeptide or protein.

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.