mRNA,tRNA,rRNA Flashcards
what is mRNA and what does it stand for
it is a copy of a gene from DNA and stands for Messenger RNA
WHere is Mrna created
the nucleus
what happens in the nucleus after mRNA is made
it then leaves the nucleus to carry the copy of the genetic code of one gene to a ribosome in the cyctoplasm
why cant DNA leave the nucleus and what happens instead
as it is too large and would be at risk of being damaged by enzymes therefore destroying the genetic code permanently.
mRNA is much shorter and the length of one gene therefore can leave the nucleus
why is mRNA short lived
as it is only needed temporarily to create a protein, therefore by the time enzymes broke it down it would have already carried out its fucntion of transferring information to the RNA
what does tRNA stand for
transfer RNA
What are the features of tRNA
it is single stranded, but folded into a shape that looks like a clover leafe,which is held together by hydrogen bonds
what is the function of tRNA
its function is to attach one of the 20 amino acids and transfer this amino acid to the ribosome to create the polypeptide chain
what does rRNA stand for
ribosomal RNA
WHat is ribosomal RNA
the type of RNA that takes up the bulk of ribosomes
what is rRNA’s function
combines with a protein to make a ribosome
