Question

Which of the following is NOT a way in which an enzyme can speed up the reaction that it catalyzes?

a. The active site of the enzyme can provide a microenvironment with a different pH that facilitates the reaction.
b. The active site can provide heat from the environment that raises the energy content of the substrate.
c. Binding of the substrate to the active site can stretch bonds in the substrate that need to be broken.
d. The enzyme binds a cofactor that interacts with the substrate to facilitate the reaction.
e. The binding of two substrates in the active site provides the correct orientation for them to react to form a product.

Answer 1

The answer is B.

It doesn’t really make sense and isn’t something an enzyme does. Enzymes help chemical reactions occur. They don’t alter the intrinsic energy of a particular substrate.

Answer 2

b. The active site can provide heat from the environment that raises the energy content of the substrate.

Step-by-step explanation:

Enzymes are the biocatalysts that speed up the chemical reactions occurring inside the cells by lowering down the activation energy. Activation energy is the energy required to convert the substrates from their ground state into the transition state to facilitate the formation of products.

Enzymes favor the formation of transition state at lower temperatures by lowering down the activation energy and make the reactions to occur at lower temperatures. Substrates bind to the active sites, specific binding sites on enzymes. Active sites do not channelize the energy from the surroundings to the substrates.