Fact 1: Molecules of DNA are encoded with instructions that tell cells what to do. Fact 2: Genes are parts of DNA molecules. Given the two facts above, what tells a cell what to do?

Available choices:
1). breathe;
2). alleles;
3). Energy;
4). voltage;
5). fever;
6). genes;
7). nerves;
8). state;
Answer:
6).