Every gene is made of specific nucleotide sequences that code for a specific amino acid. The nucleotide sequence involves the arrangement of four nitrogenous bases namely adenine, guanine, cytosine, and thymine or uracil. The expression of these genes is, however, controlled by regulatory genes that either up-regulate or down-regulate the production of target proteins.

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Chapter 21, Problem 12TYK

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Introduction: Every gene is made of specific nucleotide sequences that code for a specific amino acid. The nucleotide sequence involves the arrangement of four nitrogenous bases namely adenine, guanine, cytosine, and thymine or uracil. The expression of these genes is, however, controlled by regulatory genes that either up-regulate or down-regulate the production of target proteins.

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