Praxis II Biology

Answer: A, The statement that is false is that structural genes can code for regulatory factors. Structural genes code for any protein or RNA that is not a regulatory factor.

Key Takeaway: A structural gene is a gene whose produce is an enzyme, protein, or RNA that is involved in structural functions. In bacteria, the overwhelming majority of genes are structural genes. Structural genes are controlled by regulatory genes. Structural genes that are activated by regulatory genes are said to be under positive control, and structural genes that are inactivated by regulatory genes are said to be under negative control. In eukaryotes, regulation of structural genes is a much more complicated process, involving numerous factors to control gene activity.