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Protein Synthesis (Transcription) (Transcription (Occurs in the nucleus…
Protein Synthesis (Transcription)
Transcription
Occurs in the nucleus and is the
first step
of protein synthesis
When a portion of DNA is unzipped, so that the mRNA (messenger RNA) can be made from the DNA like a template
nucleotides of RNA match with one strand of DNA to make mRNA
Translation
Occurs in the cytoplasm of the cell
(...)
RNA polymerase
Unzips the DNA and puts RNA nucleotides into the right place
Reminder RNA uses Uracil instead of Thymine
The mRNA doesn't copy the entire strand of DNA, it copies the portion of DNA that codes for the protein needed at the time
This small section of DNA coding has a start and stop signal
Once the mRNA is formed, it then travels out of the nucleus through the nuclear pore and goes into the cytoplasm
mRNA is read 3 bases at a time; called CODONS through the ribosomal RNA
The ribosoms are the protein making machines which read mRNA and add the correct amino acids using tRNA
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3 TYPES OF RNA
-mRNA
ribosomal RNA
transfer RNA
The mRNA will find a ribosome located in the cytoplasm