Q. No.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
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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.
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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
The living state is synonymous with:
1. Cellular organization
2. Metabolism
3. Consciousness
4. Reproduction
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Consider the following two statements regarding enzyme action:
| I: | Co-factors play a crucial role in the catalytic activity of the enzyme. |
| II: | Catalytic activity is reduced when the co-factor is removed from the enzyme. |
Of the above statements:
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. I is incorrect but II is correct
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Enzymes, vitamins and hormones are common in :
1. Being proteinaceous
2. Being synthesized in the body of organisms
3. Enhancing oxidative metabolism
4. Regulating metabolism
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An enzyme brings about :
1. Decrease in reaction time
2. Increase in reaction time
3. Increase in activation energy
4. Reduction in activation energy
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The high energy bonds in an ATP molecule are between :
1. Ribose and nitrogenous base
2. Nitrogenous base and phosphate
3. Ribose and phosphate
4. Phosphate groups
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