What is a gene?
A) A gene is a sequence of three nitrogenous bases along a DNA strand.
B) A gene is a polypeptide formed by linked amino acids.
C) A gene is a sequence of three nitrogenous bases along an RNA strand.
D) A gene is a portion of a DNA strand that functions as a hereditary unit and codes for a specific protein.
E) A gene is the sequence of tRNAs needed to form a polypeptide.
Answer: D
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Fill in the blank(s) with correct word
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