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THE ROLE OF DNA AND RNA
THE ROLE OF DNA
DNA carries genes.
A gene is a length of DNA that codes for one or more
polypeptide (monomers are amino acids).
THE ROLE OF RNA
DNA is too large to leave the nucleus and so somehow polypeptides need to be made.
Polypeptides can be made from ribosomes but this doesn't code for the polypeptide.
TYPES OF RNA
mRNA-messenger RNA (ribose nucleic acid) carries the code for a
polypeptide out of the nucleus via the nuclear pore to a ribosome; this copies
rRNA-ribosomal RNA forms part of the ribosome.
tRNA-transporter RNA carries amino acids.
RNA IS INVOLVED IN SYNTHESISING POLYPEPTIDES OTHERWISE KNOWN AS PROTEIN