I think it’s 12 but i’m not 100% sure.
Explanation:
Chromosomes contain nucleus that make up DND, RNA, and protein ( histone)
The oldest fossils would be at the bottom, while the youngest would be closer to the surface.
The answer should be "a" but it needs to read the promoter region of a gene is bound to the enzyme RNA polymerase, positioning the enzyme on the correct DNA strand.
In the process of transcription, an enzyme called RNA polymerase recognizes and binds to a DNA nucleotide sequence just before the beginning of the gene. This recognition site, called a promoter, positions RNA polymerase properly on the correct DNA strand and points it in the right direction.
The DNA strands then separate over a short distance and the polymerase moves into the gene and as it moves, it creates a new chain by linking together individual ribonucleotides existing free in the cell, This new chain or strand is called messenger RNA.
