A ribosome inhibiting secondary metabolite
protein found in the castor plant is:
1. Ricin

2. Abrin

3. Concanvalin A

4. Vinblastin

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When an enzyme-substrate reaction tends
toward zero order, the only way to make a
reaction speed up is to:
1. Add more substrate
2. Add more enzyme
3. Increase the temperature
4. Increase the pressure in the medium

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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

Subtopic:  Proteins |

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The plot represents the relationship between
substrate concentration and velocity for a
single enzyme in the absence (curve x) and
presence (curve y) of a compound that binds
allosterically to the enzyme. The allosteric
compound is:

1. a competitive inhibitor.
2. a noncompetitive inhibitor.
3. an irreversible inhibitor.
4. an activator.

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The metal ion that acts as a co-factor for both alcohol dehydrogenase and carbonic anhydrase is:

1. Magnesium 2. Iron
3. Zinc 4. Nickel
Subtopic:  Enzyme Cofactors |
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The living state can be best described as a:
1. non equilibrium steady state
2. non equilibrium non steady state
3. equilibrium non steady state
4. equilibrium steady state

Subtopic:  THE LIVING STATE (OLD NCERT) |
 81%
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The blood concentration of glucose in a normal healthy individual is:

1. 3.5 – 4.0 mM 2. 4.0 – 4.5 mM
3. 4.2 – 6.1 mM 4. 5.0 – 5.5 mM
Subtopic:  THE LIVING STATE (OLD NCERT) |
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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.

Subtopic:  Enzyme Inhibition |
 68%

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The conversion of glucose into lactic acid in
our muscles takes place in:
1. 9 metabolic steps
2. 10 metabolic steps
3. 11 metabolic steps
4. 12 metabolic steps

Subtopic:  METABOLIC BASIS FOR LIVING (OLD NCERT) |

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The living state is synonymous with:
1. Cellular organization
2. Metabolism
3. Consciousness
4. Reproduction

Subtopic:  METABOLIC BASIS FOR LIVING (OLD NCERT) |
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