Which Of The Following Is True Of Enzymes?

Which Of The Following Is True Of Enzymes

Question:

Which of the following is true of enzymes?

  1. A. They lower the activation energy of a reaction by increasing the energy level of the substrate.
  2. B. They lower the activation energy of a reaction by raising the energy level of the product.
  3. C. They do not affect the free energy change between substrate and product.
  4. D. They can be steroids instead of proteins at times.

Answer and Explanation:

The answer is A. Enzymes increase the rate of chemical reaction by lowering activation energy energy of a reaction by increasing the energy level of the substrate.

Explanation:

Enzymes are biological macromolecular catalysts that accelerate biochemical processes. Chemical processes are sped up or catalyzed by them. The molecules at the start of the process are referred to as substrates, and the enzyme changes them into new molecules, which are referred to as products. Every cell undergoes a complicated collection of metabolic events that take place in pathways. An enzyme is a protein that mediates each stage of a metabolic process.

Substrates are separated from products throughout the course of a reaction by an energy barrier that the substrates must traverse. The activation energy is the name given to this energy barrier. The activation energy barrier in the case of a transition state is much lower than the activation energy barrier in the absence of enzymes.

As a result of the development of transition states and the reduced activation energy needed, the rate of reaction is higher in enzyme catalyzed processes. This shift is caused by an apparent rise in the energy level of substrate molecules.

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