In a chemistry lab, heat is frequently use to speed up chemical reactions. However, in cells, enzymes speed up metabolic reactions. Enzymes are preferred in cells because heat will speed up _______ metabolic reactions while enzymes speed up _______ metabolic reactions. In human cells, high heat (above 39 ℃) may also cause metabolic enzymes to work much  __________.

Question 19 (1.5 points) Why are enzymes important to humans? Question 19 options: Because they can evade the laws of thermodynamics. Because they allow reactions to occur at body temperature. Because they increase body temperature. Because they are proteins.

Enzymes are catalysts that affect biological reactions. How do enzymes change the rates of reactions in the body?A.Enzymes decrease reaction rates by decreasing the energy of the products.B.Enzymes decrease reaction rates by lowering the activation energy.C.Enzymes increase reaction rates by lowering the activation energy.D.Enzymes increase reaction rates by increasing the energy of the reactants.

Which of the following correctly describes how enzymes lower the activation energy of a biochemical reaction?Question 8Answera.Enzymes increase the temperature of the reaction, providing more energy to the reactants.b.Enzymes stabilize the transition state, reducing the energy required to reach it.c.Enzymes alter the equilibrium constant of the reaction, favoring product formation.d.Enzymes are consumed in the reaction and must be continually replaced.

How do enzymes speed up the rate at which a biological reaction occurs?Group of answer choicesBy increasing the energy of the reactant molecules.By increasing the total amount of energy released by the reaction.By decreasing the amount of energy needed to proceed through the reaction.By increasing the energy of the product molecules.By making the reaction release energy rather than requiring energy.

Enzymes are:Question 2Select one:a.carbohydrates that store biological energy.b.lipids that form biological membranes.c.proteins that speed up biochemical reactions.d.nucleic acids that have the information to make proteins.