Question 1
Which Of The Following Statements Regarding Enzyme Function Is FALSE?
Question 2
Which of the following statements regarding enzymes is true?
A. Enzymes increase the rate of a reaction by making the reaction more exergonic
B. Enzymes increase the rate of a reaction by lowering the necessary activation energy.
C. Enzymes have no effect on the rate of reaction; they are only important in transporting oxygen
Answer to question 1
Answer:
15:
The enzyme does not end up after usage. It remains the same and only acts as a catalyst in biological systems.
Hence,option(a) is correct.
16:
Enzymes can be destroyed by heating them up by changing the 3d shape of the enzyme.
Hence,option(B) is correct.
Answer question 2
The statement regarding enzymes that is TRUE is
B. Enzymes increase the rate of a reaction by lowering the necessary activation energy.
- Enzymes increase the reaction rate for a chemical reaction by lowering the activation energy required to convert substates to products. They do this by stressing the bonds in substrate(s), orienting substates correctly so that they are better poised to react, and/or by providing the proper microenvironment required for the chemical reaction to occur. They lower the energy of the transition state, the peak seen between the substrates and products in the reaction profile of a chemical reaction.
Choice C. is incorrect because enzymes DO have an effect on the rate of reaction: they speed up the rate of reaction. Enzymes are important for a wide variety of functions, depending on the enzyme, and are not only important for transporting oxygen.