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Concept explainers
(a)
Interpretation: The validation of the statement about the enzyme terminology has to be stated.
Concept introduction: The enzymes that have both the protein and the nonprotein part are called conjugated enzymes. The protein part of the conjugated enzymes is known as apoenzyme.
(b)
Interpretation: The validation of the statement about the enzyme terminology has to be stated.
Concept introduction: The enzymes that have both the protein and the nonprotein part are called conjugated enzymes. The protein part of the conjugated enzymes is known as apoenzyme.
(c)
Interpretation: The validation of the statement about the enzyme terminology has to be stated.
Concept introduction: The enzymes that have both the protein and the nonprotein part are called conjugated enzymes. The protein part of the conjugated enzymes is known as apoenzyme.
(d)
Interpretation: The validation of the statement about the enzyme terminology has to be stated.
Concept introduction: The enzymes that have both the protein and the nonprotein part are called conjugated enzymes. The protein part of the conjugated enzymes is known as apoenzyme.
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Chapter 21 Solutions
EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
- Define the following terms:a. cofactorb. coenzymec. apoenzymed. holoenzymee. velocityarrow_forwardWhich of the following is NOT a role of coenzymes? A. Receiver or donor of hydrides in redox reactions B. Receiver or donor of carboxyl groups in reactions that involve carboxyl group transfer. C. Receiver or donor of amino groups in transamination and deamination reactions. D. Receiver or donor of alkyl, alkenyl, acyl, or formyl groups in transfer reactions. E. Receiver or donor of oxygen in oxygenation reactions.arrow_forwardSelect all the true statements about sequential versus concerted models of allostery. a. In sequential allostery, binding of the substrate on one end of an enzyme causes a conformational change on the other end which propagates to another enzyme and enables easier binding of a second substrate to the second enzyme b. No conformational changes occur in either model c. In concerted allostery, the two forms of the enzyme exist in equilibrium because of a conformational change independent of substrate binding d. In concerted allostery, binding of the substrate to one of the forms is favorable (but not to the other) and binding of the second substrate is enhanced on the favorable formarrow_forward
- The concept of “induced fit” refers to the fact that: a. enzyme specificity is induced by enzyme-substrate binding. b. enzyme-substrate binding induces an increase in the reaction entropy, thereby catalyzing the reaction. c. enzyme-substrate binding induces movement along the reaction coordinate to the transition state. d. substrate binding may induce a conformational change in the enzyme, which then brings catalytic groups into proper orientation. e. when a substrate binds to an enzyme, the enzyme induces a loss of water (desolvation) from the substrate.arrow_forwardIn order for ATP to effectively deliver energy to an enzyme, the following needs to be the case: a. a. ATP hydrolysis is spatially close to the enzyme’s active site b. There must be a separate protein present whose task is ATP hydrolysis c. There must be a phosphate acceptor present d. ATP must be formed during the reactionarrow_forwardEnzymes can be regulated in a many different ways. Covalent modification is one way. Here, the functional groups are attached to or removed from the enzyme. A phosphate group is an example of a functional group that can be added to an enzyme. Depending on the enzyme, addition of a phosphate group can either increase or decrease an enzyme's activity. Evaluate the following names and identify the general name of an enzyme that functions to add phosphate groups to its substrate? A. isomerase B. phosphatase C. kinase D. ligasearrow_forward
- One of the enzymes involved in glycolysis, aldolase, requires Zn2+ for catalysis. Under conditions of zinc deficiency and the enzyme lacks zinc, it would be referred to as the: a. apoenzyme. b. coenzyme. c. holoenzyme. d. prosthetic group. e. substrate.arrow_forwardWhich of the following statements about the Michaelis Menten constant (Km) is correct......A. can be determined by plotting the data v/[S] against 1/[S] B. A large Km indicates a low affinity between the enzyme and the substrate C. A large Km means that a large concentration of substrate is needed for the enzyme to work D. is a measure of the affinity of enzymes for proteins, minerals and vitamins E. Small Km means that a large concentration of substrate is needed for the enzyme to workarrow_forwardwhich of the following statements are correct?a. coenzyme is an alternate name for all cofactors b. metal ions can function as cofactors c. all conjugated enzymes contain cofactorsarrow_forward
- Indicate whether each of the following statements about enzyme terminology is TRUE or FALSE. All conjugated enzymes contain a cofactor. An apoenzyme has both a protein and nonprotein part. Metal ions cannot be present in a cofactor. An apoenzyme is present in all holoenzymes. Simple enzymes cannot contain cofactors. A holoenzyme has both a protein and nonprotein part. Metal atoms are present in all conjugated proteins. A cofactor is present in some, but not all, conjugated enzymes.arrow_forwardWhich of the following statements concerning ATP is true? a. The free energy value for the hydrolysis of ATP is nearly the same for ADP. b. The free energy value for the hydrolysis of ATP is greater than that for ADP. c. ATP hydrolysis is more likely at pH 5 than at pH 7. d. One mole of glycerate-1,3-bisphosphate can phosphorylate one mole of AMP to yield ATP.arrow_forwardMatch each reaction description to the type of enzyme that catalyzes the reaction. 1. Oxidation and reduction of compounds 2. Transfers a functional group from one compound to another compound 3. Utilizes water to break bonds within a compound 4. Addition/removal of a group of atoms and bonds within a compound 5. Forms a bond between two compounds A. Ligase B. Transferase C. Hydrolase D. Oxidoreductase E. Isomerase F. Lyasearrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College
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