Question
E Page 97
5.4. Describe the role of enzymes in metabolic pathways.
A genetic mutation causes the three-dimensional shape of a photosynthetic enzyme to change,
but the active site is unaffected. Which of the following is/are likely the result(s)?
Click or tap a choice to answer the question.
This enzyme's shape is not affected by pH.
The substrate molecules cannot attach to
the enzyme.
There would be no effect on normal enzyme
function.
The enzyme now must use an induced fit
reaction.
The associated metabolic reaction takes
more energy.
Answer
Enzymes act as catalysts in metabolic pathways, increasing the rate of chemical reactions by lowering the activation energy required for the reaction to occur. In the case of a genetic mutation causing a change in the three-dimensional shape of a photosynthetic enzyme, but leaving the active site unaffected, there would likely be no effect on normal enzyme function.