1. Give the names of the areas of DNA where transcription starts and ends. 2. Which enzyme copies the DNA?
3. What is added to the 3' and 5' ends of the RNA molecule before it leaves the nucleus? 4. Name the structure
that cuts the introns out of the pre-mRNA.

1. Transcription begins when RNA polymerase binds to a promoter sequence near the beginning of a gene (directly or through helper proteins). RNA polymerase uses one of the DNA strands (the template strand) as a template to make a new, complementary RNA molecule. Transcription ends in a process called termination. 2. DNA polymerase 3. Before mRNA leaves the nucleus of a eukaryotic cell, a cap is added to one end of the molecule, a poly A tail is added to the other end, introns are removed, and exons are spliced together. Sequence of nucleotides in messenger RNA is translated into a sequence of amino acids. 4. In RNA splicing, specific parts of the pre-mRNA, called introns are recognized and removed by a protein-and-RNA complex called the spliceosome.

Explanation:

I hope this helps. ^_^

ocean expansion, global warming is melting icebergs and causing water levels to rise.

this is math not biology xd