Figure 8.3 - Metabolic Pathway
$$\begin{array} { c c }
\text { Gene } a & \text { Gene } b \
\downarrow & \downarrow \
\text { Enzyme A } & \text { Enzyme B } \
\downarrow & \downarrow \
\text { Compound A } & \rightarrow \text { Compound B } \rightarrow \text { Compound C }
\end{array}$$
-In Figure 8.3, if enzyme A is a repressible enzyme, compound C would
A) bind directly to gene a.
B) bind to the corepressor for Gene a.
C) bind to RNA polymerase.
D) bind to Enzyme A.
E) always be in excess.

Question

Figure 8.3 - Metabolic Pathway
 $$\begin{array} { c c } 
\text { Gene } a & \text { Gene } b \
\downarrow & \downarrow \
\text { Enzyme A } & \text { Enzyme B } \
\downarrow & \downarrow \
\text { Compound A } & \rightarrow \text { Compound B } \rightarrow \text { Compound C }
\end{array}$$
-In Figure 8.3, if enzyme A is a repressible enzyme, compound C would
A) bind directly to gene a.
B) bind to the corepressor for Gene a.
C) bind to RNA polymerase.
D) bind to Enzyme A.
E) always be in excess.

Quizplus · Accepted Answer

Compound C would bind to the corepressor, which then binds to the operator region of gene a, inhibiting transcription and thus repressing enzyme A production.

Figure 83 - Metabolic Pathway -In Figure 8