TRANSCRIPTION
1. Using the DNA as a template, RNA
polymerase synthesizes the messenger
RNA from the 5’to 3’ direction
2. The messenger RNA is protected with a 5’ cap and a polyA tail
3. The introns (or junk messages) are
edited out of the strand
4. The exons (or essential messages) are
kept in
Now the
mRNA is ready to move out to the cytoplasm to be translate By the ribosome.
TRANSLATION
PROTEIN
SYNTHESIS TAKES PLACE
AT THE RIBOSOME, composed of
The LARGE RIBOSOMAL SUBUNIT AND
SMALL RIBOSOMAL SUBUNIT.
THE AMINO ACIDS ARE FETCHED BY
THE tRNA (transfer RNA) and tRNA has the
ANTIcodon,
the
complement for the mRNA.
The tRNA goes to a binding site on the ribosome
and
they release their amino acid. The ribosome synthesizes
the polypeptide by using dehydration synthesis.
The start codon is always, universally AUG.
The start anticodon is
Always UAC.
And the start amino acid is MET or methionine.
When the start codon gets a tRNA, it is called
INITIATION.
WHEN THE POLYPEPTIDE CHAIN IS GENERATED ,it is
called
ELONGATION
When the RELEASE FACTOR LANDS ON THE STOP
CODON,
it is
called TERMINATION.
