Biology (DNA)

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more harmful than a missense mutation. A nonsense mutation results in the termination of translation and therefore the protein that is to be translated is not fully synthesized, rendering it inactive. A missense mutation results in one amino acid change. The result is a protein that may or may not function to full capacity, depending on where the amino acid substitution has fallen. A missense mutation can be just as harmful as a nonsense mutation, but there is the slight chance that it will not.

4. Three factors that produce gene mutations are UV radiation, X rays, and chemicals such as pesticides.

5. The stop codons are UGA, UAA, and UAG. Using Figure 7, Section 5.2, p. 240 of the Student Text, the following codons can be changed by one base and become stop codons: UAU, UAC, UGU, UGC, UGG, UUA, UCA, UUG, UCG, CGA, AGA, GGA, CAA, CAG, AAA, AAG, GAA, and GAG. These codons differ by one nitrogenous base from a stop codon. Applying Inquiry Skills

6. AUG–UUU–UUG–CCU–UAU–CAU–CGU ...

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