Which of the following statements provides reasoning that supports the claim that Brown fatty tissue?
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AP BiologyScoring GuideUnit 3 TestCopyright © 2020. The College Board. These materials are part of a College Board program. Use or distribution of these materials online or in printbeyond your school’s participation in the program is prohibited.Page 1 of 471.A researcher proposes a model of an enzyme-catalyzed reaction in which a reactant is converted to aproduct. The model is based on the idea that the reactant passes through a transition state within the enzyme-substrate complex before the reactant is converted to the product.Which of the following statements best helps explain how the enzyme speeds up the reaction?AThe enzyme’s active site binds to and stabilizes the reactant, which decreases the free-energy change of thereaction.BThe enzyme’s active site binds to and stabilizes the transition state, which decreases the activation energy ofthe reaction.CThe enzyme’s active site binds to and stabilizes the product, which increases the amount of energy releasedby the reaction.DThe enzyme’s active site binds to and stabilizes both the reactant and the product at the same time, whichincreases the reaction’s equilibrium constant.2.Alcohol dehydrogenase () is an enzyme that aids in the decomposition of ethyl alcoholinto nontoxic substances. Methyl alcohol acts as a competitive inhibitor of ethyl alcohol by competing forthe same active site on. When attached to, methyl alcohol is converted to formaldehyde, whichis toxic in the body.Which of the following statements best predicts the effect of increasing the concentration of substrate (ethylalcohol), while keeping the concentration of the inhibitor (methyl alcohol) constant?AThere will be an increase in formaldehyde becauseactivity increases.BCompetitive inhibition will be terminated because ethyl alcohol will bind to methyl alcohol and decreaseactivity.CThe peptide bonds in the active site of the enzyme will be denatured, inhibiting the enzyme.DCompetitive inhibition will decrease because the proportion of the active sites occupied by substrate willincrease.3.A researcher claims that increased atmospheric carbon dioxide levels cause increased growth rates in plants.Which of the following statements best supports the researcher’s claim? Which of the following statements provides evidence to support the claim that no ATP?Which of the following statements provides evidence to support the claim that no ATP will be synthesized in the absence of a proton gradient across the thylakoid membrane? No ATP is synthesized when channel proteins that allow the free passage of protons are inserted into the thylakoid membrane.
Which of the following statements best helps explain how the lead ion causes inhibition of alad?Which of the following statements best helps explain how the lead ion causes inhibition of ALAD? It changes the shape and charge of the substrate so that it becomes more compatible with ALAD's active site.
Which of the following best explains how the rate of the reaction changes over time?Which of the following best explains how the rate of the reaction changes over time. the rate decreases because the ratio of product to substrate increases.
Which of the following statements best helps explain the reaction specificity of an enzyme?Which of the following statements best helps explain the reaction specificity of an enzyme? The shape and charge of the substrates are compatible with the active site of the enzyme.
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