PROTEIN SYNTHESIS: PART 2

The genetic code is read three letters at a time, so each “word” is three bases long.

Each three letter “word” is called a codon

And codes for a specific amino acid.

RNA CONTAINS FOUR BASES: A,U,G,C

WHAT IS THE CODON FOR LYSINE?

The cell uses information from the mRNA to produce proteins at the ribosomes.

TRANSLATION

1) Ribosome attaches to an mRNA molecule in the cytoplasm.

STEPS:

2) Transfer RNA (tRNA): brings in the correct amino acid into the ribosome.Anticodon= three bases on tRNA that are complementary to codon on mRNA

COLOR: AMINO ACIDS= BLUE, T-RNA ANTICODONS = RED, AND M-RNA CODONS=

YELLOW

3) Ribosome joins the two amino acids and breaks the bond between the amino acid and tRNA.

TRANSLATION CONTINUED:

4) tRNA floats away from the ribosome which allows the ribosome to bind another tRNA.

#5) Process continues until ribosome reaches the stop signal. mRNA and protein are released from the ribosome.

TRANSLATION CONTINUED:

What is the mRNA strand?

What would be the three amino acids in this protein?

IF THE DNA STRAND IS ATGCATGCA

Create a Protein!