To review:
The given blank space in the statement, “once started, some reactions release energy and are called ___________ reactions. Others require a net input of energy and are called ____________ reactions. Which type of reaction will continue spontaneously once it starts? ________. Which type of reaction allows the formation of complex biological molecules from simpler molecules? ___________.”
Introduction:
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BIOLOGY:LIFE ON EARTH-W/ACCESS
- Which of the following is/are TRUE of an enzyme? Enzymes lower the release of free energy Enzymes are not consumed in a reaction Not all enzymes are proteins Enzymes only affect endergonic reactions Enzymes only affect exergonic reactionsarrow_forwardWhich of the following statements about enzyme function is FALSE? Enzymes change shape permanently after a reaction, and can’t be re-used. Enzymes are types of proteins. Enzymes are highly specific molecules. Enzymes lower the activation energy of a reaction. Enzymes bind to substrates a an area called the “active site."arrow_forwardWhich of the following statements regarding enzymes is true? A. Enzymes decrease the free energy change of a reaction. B. Enzymes cjange the direction of chemical reaction. C. Enzymes prevent changes in substrate concentrations. D. Enzymes increase the rate of a reaction. E. Enzymes are permanently altered by the reactions they catalyze.arrow_forward
- Chemical reactions that take place in living systems include A. Neutralization reaction B. Condensation reaction C. Hydrolysis reaction D. All the abovearrow_forwardThe graph below shows how temperature affects the rate of chemical reactions At what temperature is the rate of reaction the highest?arrow_forwardWhich of the following statements are correct about how enzymes accelerate chemical reactions (select all that apply)? A. Enzymes bind substrates to raise their effective concentration B. Enzymes enhance the rate of a chemical reaction C. Enzymes catalyze chemical reactions by destabilizing transition states D. Side chains of protein provide reactive groups that facilitate reaction E. Enzymes shift the equilibrium of a chemical reaction to favor product formationarrow_forward
- Which of the following statements is not correct? a. Energy cannot be created or destroyed. b. Energy cannot change from one form to another. c. Energy tends to disperse spontaneously. d. Energy can be transferred.arrow_forward___________________ are molecules that influence the speed of chemical reactions, and are not consumed in the process.arrow_forwardAmino acids are converted to proteins inside the cell. Which of the following are true about this reaction? (you may select more than one answer) The products of this reaction are more polar than the reactants. This reaction requires enzymes. This results in an increase in the number of polymers of the reaction. This is a dehydration reaction.arrow_forward
- Which of the following statements regarding catalysts is false? * A catalyst increases the rate of a reaction by giving the reaction an alternate pathway with a lower activation energy. * Catalysts don't need to be present in large amounts because they are regenerated during the reaction. * Enzymes act as catalysts in our bodies. * Catalysts do not participate in the reaction. * The shape of an active site on an enzyme is unique, allowing it to react with only one substrate.arrow_forwardWhich of the following statements is a lie? Select one: a. Chemical energy is the energy within chemical bonds. Energy is required for bonds to break while energy is released when bonds form. b. Exergonic chemical reactions release more energy than they absorb and the catabolism of the food in an energy bar serves as an example. c. The many forms of energy used up by cells comes from the breakdown of the chemical energy from the food we digest.arrow_forwardWhich of the following reactions would decrease the entropy within a cell? A) anabolic reaction B) synthesis of a hemoglobin molecule C) dehydration reaction D) reaction with a positive △G E) All of the abovearrow_forward
- Biology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage Learning