DNA

DNA

The Genetic Code

The Genetic Code

Key Concept: The order of the nitrogen bases along a gene forms a genetic code that specifies what type of protein will be produced.

Chromosomes are made mostly of DNA, DNA has four different nitrogen bases

• Adenine

• Guanine

• thymine

• cytosine

Multiple Choice

What forms the rungs of the DNA ladder?

• Nitrogen bases (nucleotide pairs) A, T, G, and C

• RNA, DNA and mRNA

• Wood