Question

Which of the following are true of enzyme catalysts: A) They change the equilibrium constant of a reaction to favor the formation of products. B) To be effective, the enzyme concentration must exceed the substrate concentration. C) Enzymes decrease the activation energy for conversion of substrate to product. D) Enzymes increase the rate of a reaction by adding energy to the substrates. E) Enzymes may be made of protein or RNA. An enzyme catalyzes the conversion of substrate [S] to product [P] at pH 6. The ΔG for the reaction is +3.0 kJ/mole. Which of the following statements are true? A) The enzyme will convert all of the substrate to product. B) The enzyme will not convert any of the substrate to product. C) The enzyme will convert substrate to product, but only until [S] = [P] D) When the reaction reaches equilibrium, [S] will be greater than [P] E) When the reaction reaches equilibrium, [P] will be greater than [S]

          Which of the following are true of enzyme catalysts:
A) They change the equilibrium constant of a reaction to favor the
formation of products.
B) To be effective, the enzyme concentration must exceed the
substrate concentration.
C) Enzymes decrease the activation energy for conversion of
substrate to product. D) Enzymes increase the rate of a reaction by
adding energy to the substrates.
E) Enzymes may be made of protein or RNA.
An enzyme catalyzes the conversion of substrate [S] to product
[P] at pH 6. The ΔG for the reaction is +3.0 kJ/mole. Which of
the following statements are true?
A) The enzyme will convert all of the substrate to
product.
B) The enzyme will not convert any of the substrate to
product.
C) The enzyme will convert substrate to product, but only until [S]
= [P] D) When the reaction reaches equilibrium, [S] will be greater
than [P] E) When the reaction reaches equilibrium, [P] will be
greater than [S]

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Added by Andrew M.

Biology for AP Courses

Julianne Zedalis, John Eggebrecht

Instant Answer

Solved by Expert Maitreya E

05/27/2022

Step 1

Enzymes do not change the equilibrium constant of a reaction. They only speed up the rate at which the reaction reaches equilibrium. B) False. The enzyme concentration does not need to exceed the substrate concentration to be effective. Even in small amounts, Show more…

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Which of the following are true of enzyme catalysts: A) They change the equilibrium constant of a reaction to favor the formation of products. B) To be effective, the enzyme concentration must exceed the substrate concentration. C) Enzymes decrease the activation energy for conversion of substrate to product. D) Enzymes increase the rate of a reaction by adding energy to the substrates. E) Enzymes may be made of protein or RNA. An enzyme catalyzes the conversion of substrate [S] to product [P] at pH 6. The ΔG for the reaction is +3.0 kJ/mole. Which of the following statements are true? A) The enzyme will convert all of the substrate to product. B) The enzyme will not convert any of the substrate to product. C) The enzyme will convert substrate to product, but only until [S] = [P] D) When the reaction reaches equilibrium, [S] will be greater than [P] E) When the reaction reaches equilibrium, [P] will be greater than [S]

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Transcript

00:01 Hello, students.

00:01 So in this question, they have asked which of the following statements regarding enzyme catalyst is true.

00:07 Now, if you observe the enzyme catalyst, what will you see? we will observe that in case of a normal reaction, there's something called energy activation or the activation energy.

00:20 So this activation energy in the absence of enzyme is very high.

00:24 So what the enzymes do is they will reduce that activation energy by, providing more energy, right? so that is what is going to happen with respect to enzyme catalyzed reaction.

00:37 Now let us go to the options that they have given.

00:41 In the first option, they've given that the change in the equilibrium constant, or rather if we change the equilibrium constant of a reaction to favor the formation of the products.

00:53 Is this statement correct? now, can you change the equilibrium constant.

00:58 No, right? so in this case, we can say that the statement is definitely wrong.

01:02 Coming to the second option, they have given that the reaction will be effective if you increase the concentration of enzymes more than that of the substrate.

01:13 Now, if the substrate concentration is more than that of the enzyme concentration, then only will you observe it to be effective, not the vice versa.

01:26 So even this statement is wrong.

01:29 Coming to the third statement, decrease in the activation energy for the conversion of substrate to product.

01:36 This statement is correct.

01:38 Coming to the next one, enzymes increase the rate of reaction by adding energy to the substrate.

01:45 Is this statement correct? yes, right? this statement is correct.

01:49 So we can write that even the fourth statement.

01:53 That they have given us correct regarding the enzyme...

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