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Transcript
Chapter 3 Section 4
THE GENETIC CODE
 The main function of genes is to control the production
of proteins.
 Proteins help determine the size, shape and other traits
of organisms.
 Nitrogen bases form “rungs” of DNA ladder. The order
of the nitrogen bases along a gene form a genetic code
that specifies what type of protein will be produced.
 Protein Synthesis—the production of proteins.
 Messenger RNA—copies the coded message from the DNA in
the nucleus and carries the message to the ribosomes in
the cytoplasm.
 Transfer RNA—carries amino acids and adds them to the
growing protein chain.
 Mutation—any change that occurs in a gene or chromosome.