Which is false about enzymes?

FALSE. Enzymes don’t start reactions– they SPEED UP reactions that would occur eventually. … The active site is the region on the enzyme where the substrate binds.

Which statement about enzyme is not correct?

Enzymes are highly specific in action; that is one enzyme cannot catalyze more than one reaction. The activity of enzymes is reduced by certain substances called inhibitors or poison.

Which statement is true about enzymes?

The correct answer to this question is A) Enzymes lower the activation energy and the ΔG produced from a reaction. Enzymes act as catalyzing agents that are responsible for the faster formation of products in different biochemical reactions.

What are statements about enzymes?

Enzymes are proteins

They act as catalysts, which means that they make biochemical reactions happen faster than they would otherwise. Without enzymes, those reactions simply would not occur or would run too slowly to sustain life. For example, without enzymes, digestion would be impossible.

Can enzymes catalyse any reaction?

An important principle is that since they only reduce energy barriers between products and reactants, enzymes always catalyze reactions in both directions, and cannot drive a reaction forward or affect the equilibrium position – only the speed with which is it achieved.

Which statement about enzymes is essential to the lock and key hypothesis?

In the lock and key hypothesis , the shape of the active site matches the shape of its substrate molecules. This makes enzymes highly specific. Each type of enzyme can usually catalyse only one type of reaction (some may catalyse a few types of reactions).

Which of the following statements about enzyme function is correct?

Which of the following statements about enzyme function is correct? Enzymes can lower the activation energy of reactions, but they cannot change the equilibrium point because they cannot change the net energy output.

Which statement best describes what enzymes do?

Which statement best describes how enzymes function in the body? Enzymes lower the activation energy of molecules. Enzymes are specific to a substrate. Enzymes are proteins that help increase the rate of chemical reactions inside cells.

Which of the following statements best describes a characteristic of enzymes?

Which of the following statements best describes a characteristic of enzymes? Enzymes increase the rate of reactions by decreasing the amount of energy needed for the colliding reactant molecules to enter into a transitional state.

Which statement regarding pH and enzyme function is false?

Enzyme structure can be compromised if the pH is either too low or too high this is also false statement because enzyme denatured at high pH and temperature and does not work efficiently below its optimum pH and temperature. Hence, enzyme structure cannot be compromised if pH is either too low or too high.

Which of the following statements about active site of enzyme is correct?

Which of the following statements about the active site of an enzyme is correct? a) The active site of an enzyme binds the substrate of the reaction it catalyses more tightly than it does the transition state intermediate.

Which of the following statements is true about enzyme-catalyzed reactions?

Which of the following statements is true about enzyme-catalyzed reactions? The reaction is faster than the same reaction in the absence of the enzyme. … Enzymes increase the rate of a reaction by lowering the activation energy barrier.

Which is a true statement about the relationship between pH and enzyme action?

Base your answer on the graph and on your knowledge of Enzymes. Which is a true statement about the relationship between pH and enzyme action? All enzymes works best at neutral pH. Enzymes function only in a pH range of 4.0 to 5.5.

Which statement about the optimum pH for an enzyme is correct?

Optimum Enzyme pH

Most enzymes’ optimum pH is neutral or close to neutral, like amylase found in saliva, which has an optimal pH = 6.8. Some enzymes prefer a more drastic pH, like pepsin, which can have an optimum pH of 1.7 to 2.

Which statement about an enzyme is true an enzyme’s function depends on its three-dimensional shape?

The correct answer is a. An enzyme’s function depends on its three-dimensional shape.

Which statement explains the effect of an inhibitor on an enzyme?

Which statement explains the effect of an inhibitor on an enzyme? A substrate will be able to bond with the enzyme.

What statement best describes the effect of substrate concentration on enzyme activity?

Answers. If the concentration of the substrate is low, increasing its concentration will increase the rate of the reaction. An increase in the amount of enzyme will increase the rate of the reaction (provided sufficient substrate is present).

Which statement best describes why the activity of an enzyme decreases at temperatures above or below the optimum?

Activity decreases because temperature affects the conformation of the protein and the enzyme’s active site. The temperature does not affect the formation of amino acids in the enzyme.