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When chemical, transport, or mechanical work is done by an organism, what happens to the heat generated?
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Which of the following characteristics is most likely to be associated with an enzyme that catalyzes two different chemical reactions?
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BIO Test 2

QuestionAnswer
When chemical, transport, or mechanical work is done by an organism, what happens to the heat generated? It is lost to the environment
Which of the following characteristics is most likely to be associated with an enzyme that catalyzes two different chemical reactions? Either the enzyme has two distinct active sites or the substrates involved in the two reactions have very similar structures.
Which of the following is a primary function of the active site of an enzyme? It catalyzes the reaction associated with the enzyme.
A series of enzymes catalyze the reactions in the metabolic pathway X → Y → Z → A. Product A binds to the enzyme that converts X to Y at a position remote from its active site. This binding decreases the activity of the enzyme. A functions as an allosteric inhibitor
Which of the following statements is true of metabolism in its entirety in all organisms? Metabolism consists of all the energy transformation reactions in an organism.
Which of the following statements describes a key component of the induced fit hypothesis of enzyme catalysis? Binding of substrate to the active site changes the shape of the active site of an enzyme.
Which of the following statements describes a common characteristic of catabolic pathways? They are exergonic and provide energy that can be used to produce ATP from ADP and i.
When ATP releases some energy, it also releases inorganic phosphate. What happens to the inorganic phosphate in the cell? It may be used to form a phosphorylated intermediate.
Which of the following statements about enzyme function is true? Enzymes increase the rate of chemical reactions by lowering activation energy barriers.
How might a change of one amino acid at a site, distant from the active site of an enzyme, alter the substrate specificity of an enzyme? by changing the three-dimensional conformation of the enzyme
Which of the following statements describes a central role that ATP plays in cellular metabolism? ATP provides energy coupling between exergonic and endergonic reactions.
How does a noncompetitive inhibitor decrease the rate of an enzyme-catalyzed reaction? By binding to an allosteric site, thus changing the shape of the active site of the enzyme
Zinc, an essential trace element for most organisms, is present in the active site of the enzyme carboxypeptidase. The zinc most likely functions as A cofactor necessary for enzyme activity
Which of the following statements is true for a system at chemical equilibrium? The system can do no work.
Which of the following types of reactions would decrease the entropy within a cell? Anabolic reactions
Which of the following terms most precisely describes the cellular process of breaking down large molecules into smaller ones? catabolism (catabolic pathways)
Which of the following statements describes the first law of thermodynamics? Energy cannot be created or destroyed.
HIV is the virus that causes AIDS. In the mid-1990s, researchers discovered an enzyme in HIV called protease. Once the enzyme's structure was known, researchers began looking for drugs that would fit into the active site and block it. competitive inhibition
The relationship between catabolism and anabolism is most similar to the relationship between which of the following pairs of terms exergonic; endergonic
In a metabolic pathway, succinate dehydrogenase catalyzes the conversion of succinate to fumarate. The reaction is inhibited by malonic acid, a substance that resembles succinate but cannot be acted upon by succinate dehydrogenase. Succinate is the substrate, and fumarate is the product in the reaction
Created by: Akin35
 

 



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