Q. No.If an non active-site directed inhibitor is present in the medium, the curve that will represent the progress of the chemical reaction will be shown by the letter:
1. D
2. C
3. B
4. A
2. C
3. B
4. A
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The Glucose transpoter protein present in the
baso-lateral surface of the intestinal epithelial
cells is:
1. GLUT 1
2. GLUT 2
3. GLUT 3
4. GLUT 4
All the following assumptions apply to Michaelis-Menten kinetic analyses of enzyme action EXCEPT:
1. the total enzyme concentration studied at each substrate concentration is fixed in analysis of enzyme kinetics.
2. formation of enzyme-substrate complex does not appreciably decrease the concentration of substrate.
3. Km decreases with competitive inhibition.
4. maximal velocity is reached when the enzyme-substrate complex is equal to the total concentration of enzyme present.
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All of the following are true of protein denaturation except that it
1. is a shape change
2. is always irreversible
3. may be caused by a pH change
4. could result from a temperature change
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Cell membrane carbohydrates participate in
1. transporting substances between two protein layers
2. cell-to-cell recognition
3. attaching the membrane to cytoskeleton
4. cell adhesions
Given below is a schematic metabolic pathway. In an experiment, the concentration of enzyme 1 was increased but the concentration of enzymes 2 and 3 were kept constant. What would happen to the rate of production of D?
1. it would go down
2. it would go up
3. it would stay the same
4. it would stop
The compound from which cholesterol is formed is:
1. Mevalonic acid
2. Butyric acid
3. Alpha ketoglutaric acid
4. Acetic acid
Which one of the following statements is incorrect?
1. In competitive inhibition, the inhibitor molecule is not chemically changed by the enzyme.
2. The competitive inhibitor does not affect the rate of breakdown of the enzyme-substrate complex.
3. The presence of the competitive inhibitor decreases the Km of the enzyme for the substrate.
4. A competitive inhibitor reacts reversibly with the enzyme to form an enzyme-inhibitor complex.
Telomerase is an enzyme which is a
1. repetitive DNA
2. RNA
3. simple protein
4. ribonucleoprotein
Conjugated proteins containing carbohydrates as prosthetic group are known as
1. Chromoproteins
2. Glycoproteins
3. Lipoproteins
4. Nucleoproteins
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