The principal role of is to act as a messenger carrying instructions from DNA out of the nucleus for the synthesis of proteins. A serves as the site of protein synthesis in the cytoplasm. is the first step of gene expression, during which a particular segment of DNA is converted into RNA. A is made up of hundreds or thousands of smaller units called amino acids, attached to one another in long chains. is a long linear polymer found in the nucleus of a cell, shaped like a double helix, and associated with the transmission of genetic information. is the process in which mRNA codons are converted into an amino acid sequence.

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.

there's the proffessional site that will you.

the sun's light combined with the visible wavelenghts form what is called ultraviolet radiation, which are the long waves at the end of a visible light sprectrum.

hope it ,

bioteacher101

then go eat. lol.brainliest