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DNA & Protein Synthesis Review
1) Which one of the following phrases best describes a gene?
A) a segment of a DNA molecule found only in the body cells of an organism
B) a segment of a DNA molecule that contains the instructions for producing all the characteristics of an
organism
C) a segment of a DNA molecule found only in the gametes of an organism
D) a segment of a DNA molecule that contains the instructions for producing a trait in an organism
2 The processes of deletion, insertion, and substitution can alter genes in a skin cell. The altered genes will

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Answer: D) a segment of a DNA molecule that contains the instructions for producing a trait in an organism

Explanation: A gene is a DNA segment which contains the information needed in producing a protein or an RNA molecule. The protein coded for by a gene is responsible for controlling a particular trait in an organism. Usually one gene codes for one protein and one protein controls one trait in an organism. A gene is a unit of hereditary.

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