1-10 1-10 1. Which of the following is a simple enzyme? a. An enzyme that has bo
ID: 1045050 • Letter: 1
Question
1-10 1-10 1. Which of the following is a simple enzyme? a. An enzyme that has both a protein and a nonprotein portion b. An enzyme that requires Mg+ ion for activity c. An enzyme in which only amino acids are present d. An enzyme in which a cofactor is present 2. Which of the following enzyme removes H from an alcohol? a. Pyruvate carboxylase c. L-Amino acid reductase b. Alcohol dehydrogenase d. Maltase Which of the following enzyme belongs to ligase class of enzyme? a. Mutase c. Carboxylase 3. b. Dehydratase d. Kinase The protein portion of a conjugated enzyme is called a(n) a). apoenzyme b) coenzyme c).holoenzyme d).cofactor 4. The final product of a series of enzyme-catalyzed reactions causes the enzyme that catalyzes the first reaction of the series to be inhibited. This is an example of 5. a) positive regulator control b) substrate control c) feedback control d) competitive control 6. The major function for B vitamins within the human body is as a. b. c. d. antioxidants components of coenzymes regulators of cell differentiation regulators of calcium ion and phosphate ion concentrations in bloodExplanation / Answer
As per rules, only the first five questions would be answered.
1. Correct option is C.
Simple enzymes consist of only amino acid molecules and conatin no other groups other than the proteins. Eg : pepsin.
2. Correct option is B.
De-hydrogen-ase stands for removal of hydrogen by an enzyme molecule.
Alcohol dehydrogenase is the enzyme that removes hydrogen atoms from alcohol molecules. These enzymes mainly are found in the stomach and liver.
3. The correct option is C.
Ligases are the class of enzyme in which two molecules are joined toether by using energy obtained from the breakdown of high energy ATP molecules.
One common example is pyruvate carboxylase.
4. The correct option is A
Enzymes are classified either as simple enzymes that conatin only amino acid molecules.
The other category is conjugated enzyme composed of a protein part called apoenzyme and a non-protein part called co-factor. Some co-factors are inorganic ions like Mg2+ or Fe2+.
5. The correct option is C.
In feedback inhibition, the final product of a series of enzyme catalysed reactions gets accumulated in large numbers due to which the final product binds to an allosteric site of the enzyme that catalyses the first reaction of the enzymatic series. Due to its binding to the allosteric site, the activity of the enzyme is inhibited. Hence in this way it regulates the amount of end product from being produced in large amounts.
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