Page 112 - If Darwin Had Known about DNA

Harun Yahya

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1) mRNA works together first with small sub-units of
the ribosome, and then with larger ones. The ribo- Amino acid
some units are then added on to one another.
tRNA
mRNA

Large Anti-Codon Ribosome
Sub-Unit Second
Small Main Codon
Sub-unit 2) A particular tRNA carries Codon
a particular amino acid.
3) The tRNA anti-codon attach-
es to the mRNA codon.
Peptide bond
Developing protein

The ribosome
Departing tRNA moves right along
the mRNA.

4) A subsequent tRNA moves for- 5) Amino acids are at- 6) The more amino acid is
ward, carrying an amino acid, to tached by a peptide bond, transported by the tRNA, the
take up its place on the mRNA. and the first tRNA departs. farther the protein extends.

Departing Protein mRNA
Developing Protein

Large
Sub-unit
Stop Small
Codon Sub-unit

7) The stop codon halts protein syn- 8) Following protein synthesis, Completed
thesis, and the protein is released. the ribosome units separate.
Protein

mRNA
Adenine Developing Protein
Cytosine
Guanine
Uracil
9) Summary of ribosome movement along the mRNA