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Biology Fsc Part 1 Chapter 3 Online Test MCQs With Answers
Question # 1
According to Lock and key model , the activate is.
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Soft structure
Flexible structure
Rigid structure
Attractive structure
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Question # 2
Co enzymes are closely related to.
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Amino acids
Vitamins
Enzyms
Non protein particles
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Question # 3
The enzyme with optimum pH = 7.60 is
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Arginase
Enterokinase
Catalase
Sucrase
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Question # 4
Optimum pH for sucrase is
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2.00
4.50
5.50
7.60
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Question # 5
Emil Fisher proposed a lock and key model in
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1990
1880
1890
1800
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Question # 6
Enzymes involved in respiration, are found in.
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Chloroplasts
Ribosome
Mitochondria
Nucleus
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Question # 7
An activated enzyme made of polypeptide chain and a co-factor is
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Substrate
Co-enzyme
Apoenzyme
Holoenzyme
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Question # 8
If more substrate to an already occurring enzymatic reaction is added more enzyme activity is seen because
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There is probably more substrate present than there is enzyme
There is probably more enzyme available than there is substrate
There is probably more product present than either substrate or enzyme
The enzyme substrate complex is probably failing to from during the reaction
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Question # 9
Optimum pH values for enzyme arginase is
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7.60
9.70
8.60
9.52
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Question # 10
Metals is ions are related to.
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Co enzymes
Vitamins
Co factors
Substrate
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Question # 11
Competitive inhibitors
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Destroy the structure of enzyme
Resemble structurally with substrate
Do occupy active site
Both b and c are correct
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Question # 12
The enzyme with optimum pH 5.50 is
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Arginase
Sucrase
pepsin
Enter kinase
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Question # 13
An enzyme reacts only with its specific.
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Surface
Product
Substrate
Inhibitor
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Question # 14
Enzyme lower down the energy of.
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Kinetic
Potential
Activation
Ionic
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Question # 15
The catalytic activity of an enzyme is restricted to its small protein called
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Active site
Passive site
Intermediate
Above all
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Question # 16
Co-enzyme is a
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Covalently bonded non-protein part of an enzyme
Loosely bonded non-protein part of an enzyme
Co-factor consists of metal ions
None of these
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Question # 17
Induced fit model was proposed by.
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Emil Fischer
Pasteur
Jenner
Koshland
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Question # 18
Optimum pH value for enzyme pepsin is.
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4.50
9.00
2.00
5.50
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Question # 19
Enzyme that are integral part of ribosomes are involved in the synthsis of
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Lipids
Carbohydrates
Proteins
None of these
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Question # 20
The optimum pH of pancreatic Lipase is
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7.00
9.00
6.40
5.20
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Question # 21
The rate of an enzyme catalyzed reaction
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Is constant under condition
Decreases as substrate concentration increases
Cannot be measured
Can be reduced by inhibitors
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