Question 22

Enzymes can catalyze reactions.

Enzymes are biological catalysts that increase the rate of chemical reactions without being consumed in the process. They facilitate reactions by lowering the activation energy required, thus speeding up the transformation of substrates into products.

A) Catalyze

This option is correct because enzymes are specifically defined as catalysts that facilitate and speed up biochemical reactions. They bind to substrates and help convert them into products through various mechanisms, demonstrating their role in catalysis.

B) Inhibit

While enzymes can be inhibited by certain molecules, this option is incorrect in the context of what enzymes primarily do. Inhibition refers to the reduction of enzyme activity rather than the promotion of reactions, which is the central role of enzymes.

C) Stop

This option is incorrect as enzymes do not stop reactions; rather, they enhance the speed at which reactions occur. Enzymes may become inactive under certain conditions, but their primary function is to catalyze reactions rather than halt them.

D) None of the above

This choice is incorrect because enzymes clearly serve the essential function of catalyzing reactions. Therefore, asserting that none of the options apply contradicts the fundamental understanding of enzyme activity.

Conclusion

Enzymes are crucial for accelerating biochemical reactions, making option A the only accurate statement regarding their function. Options B and C misrepresent the role of enzymes, and option D incorrectly denies their catalytic capability. Thus, A is definitively the correct answer as it aligns with the established scientific understanding of enzyme activity.