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question_answer1)
Term - ase is used for
A)
Classification of enzymes done
clear
B)
Enzymes with special function done
clear
C)
Nomenclature of enzymes done
clear
D)
All the above done
clear
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question_answer2)
Systematic approach of naming enzymes has been recommended by the Commission on Enzymes of the
A)
International Union of Physiology done
clear
B)
International Union of Biochemistry done
clear
C)
International Union of Biotechnology done
clear
D)
International Union of Genetic Engineering done
clear
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question_answer3)
Basically how many types of enzymes have been recognised by International Union of Biochemistry [MHCET 2000]
A)
4 done
clear
B)
5 done
clear
C)
6 done
clear
D)
8 done
clear
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question_answer4)
In the modern system of nomenclature which one of the following enzyme occupies 1st position
A)
Oxidoreductase done
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B)
Transferase done
clear
C)
Hydrolase done
clear
D)
Ligase done
clear
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question_answer5)
The plant proteinases or endopeptidases enzyme is [CPMT 1994]
A)
Urease done
clear
B)
Papain done
clear
C)
Pepsin done
clear
D)
Trypsin done
clear
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question_answer6)
Nitrate reductase enzyme is responsible for the formation of [BHU 1983; DPMT 1985]
A)
\[{{N}_{2}}\] done
clear
B)
\[N{{O}_{2}}\] done
clear
C)
\[N{{O}_{3}}\] done
clear
D)
Ammonia done
clear
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question_answer7)
The first enzyme that reduces nitrates into nitrites and ammonia in plants is [CPMT 1990]
A)
Nitrate reductase done
clear
B)
Nitrite reductase done
clear
C)
Glutamine synthetase done
clear
D)
Glutamate dehydrogenase done
clear
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question_answer8)
The enzyme responsible for atmospheric nitrogen fixation is [CPMT 1990; AIIMS 2000; CBSE PMT 2001]
A)
Nitrogenase done
clear
B)
Hydrogenase done
clear
C)
Oxygenase done
clear
D)
Carboxylase done
clear
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question_answer9)
At the time of cotton seeds germination, the stored food is digested by [CPMT 1996]
A)
Diastase done
clear
B)
Maltase done
clear
C)
Lipase done
clear
D)
Amylase done
clear
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question_answer10)
Fat is hydrolysed by enzyme lipase to yield [BHU 1982; CBSE PMT 2004]
A)
Fatty acid and amino acids done
clear
B)
Glycerol and fatty acids done
clear
C)
Glycerine and water done
clear
D)
Glycerol and amino acids done
clear
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question_answer11)
Substrate of amylase enzyme is [J & K CET 2005]
A)
Protein done
clear
B)
Fat done
clear
C)
Starch done
clear
D)
Sucrose done
clear
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question_answer12)
Enzyme which hydrolyses starch to maltose is [BHU 1979; MP PMT 1991, 99]
A)
Lactase done
clear
B)
Protease done
clear
C)
Maltase done
clear
D)
Amylase done
clear
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question_answer13)
Which one is not an example for hydrolases [Kerala PMT 2004]
A)
Dehydrogenase done
clear
B)
Protease done
clear
C)
Amylase done
clear
D)
Esterase (e) Sucrase done
clear
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question_answer14)
Which enzyme digests the stored food material of castor seeds [DPMT 1985]
A)
Lipase done
clear
B)
Amylase done
clear
C)
Diastase done
clear
D)
Protease done
clear
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question_answer15)
In the cell digestive enzymes are mostly in [CPMT 1983]
A)
Lysosome done
clear
B)
Cell wall done
clear
C)
Ribosome done
clear
D)
Chromosomes done
clear
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question_answer16)
Enzyme concerned with transfer of electrons are [MP PMT 1998, 2002, 03]
A)
Hydrolase done
clear
B)
Dehydrogenase done
clear
C)
Transaminase done
clear
D)
Desmolase done
clear
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question_answer17)
Which one of the following belongs to transferase group
A)
Amylase done
clear
B)
Transaminase done
clear
C)
Citrate synthetase done
clear
D)
Enolase done
clear
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question_answer18)
Esterase enzyme belongs to which of the following class [BHU 1982; RPMT 1989]
A)
Oxidoreductase done
clear
B)
Carboxylase done
clear
C)
Hydrolases done
clear
D)
Transferases done
clear
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question_answer19)
Fumerase enzyme belongs to which class
A)
Oxidase done
clear
B)
Carboxylase done
clear
C)
Transferase done
clear
D)
Lyases done
clear
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question_answer20)
Enzyme phosphoglucomutase belongs to
A)
Oxidase done
clear
B)
Lipase done
clear
C)
Carboxylase done
clear
D)
Isomerase done
clear
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question_answer21)
Which one belongs to hydrolase group
A)
Amylase done
clear
B)
Transaminase done
clear
C)
Citrate synthetase done
clear
D)
Enolase done
clear
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question_answer22)
The enzyme which converts proteins into peptones is [CPMT 1983]
A)
Erypsin done
clear
B)
Pepsin done
clear
C)
Trypsin done
clear
D)
Lipase done
clear
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question_answer23)
Enterokinase converts [AFMC 1996]
A)
Trypsinogen to trypsin done
clear
B)
Pepsinogen to pepsin done
clear
C)
Both (a) and (b) are correct done
clear
D)
None of these done
clear
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question_answer24)
The enzyme lipase converts [CPMT 1983]
A)
Proteins into amino acids done
clear
B)
Proteins into peptones done
clear
C)
Peptones into amino acids done
clear
D)
Fats into fatty acids and glycerol done
clear
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question_answer25)
The enzyme which converts glucose into ethyl alcohol is [MP PMT 1998, 2003]
A)
Diastase done
clear
B)
Maltase done
clear
C)
Zymase done
clear
D)
Invertase done
clear
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question_answer26)
Which of the following enzyme digests other enzymes
A)
Dehydrogenases done
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B)
Lipases done
clear
C)
Peptidases done
clear
D)
Aldolases done
clear
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question_answer27)
The enzyme which catalyzes the photosynthetic\[{{C}_{4}}\]cycle is [CPMT 1990; BHU 1991]
A)
RuDP carboxylase done
clear
B)
PEP carboxylase done
clear
C)
Carbonic anhydrase done
clear
D)
None of these done
clear
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question_answer28)
The nucleic acids are broken into nucleotides by......... enzymes [J&K CET (Med.) 2002]
A)
Amylases done
clear
B)
Nucleases done
clear
C)
Lipases done
clear
D)
Proteases done
clear
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question_answer29)
At boiling temperature an enzyme is
A)
Denatured done
clear
B)
Inactivated done
clear
C)
Killed done
clear
D)
Unaffected done
clear
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question_answer30)
As temperature changes from\[{{3}^{o}}C\]to\[{{45}^{o}}C\], the rate of enzyme activity will [MP PMT 1996]
A)
Decrease and then increase done
clear
B)
Increase and then decrease done
clear
C)
Increase only done
clear
D)
Decrease only done
clear
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question_answer31)
In most plant cells most enzymes have their optimum activity at
A)
\[{{20}^{o}}C\] done
clear
B)
\[{{25}^{o}}C\] done
clear
C)
\[{{30}^{o}}C\] done
clear
D)
\[{{35}^{o}}C\] done
clear
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question_answer32)
At temperature just below the freezing point, the enzyme [CPMT 1979]
A)
Is slightly activated done
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B)
Is destroyed done
clear
C)
Is inactivated done
clear
D)
Is unaffected done
clear
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question_answer33)
Which ions are toxic in enzymatic activity
A)
\[M{{n}^{++}}\] done
clear
B)
\[{{K}^{+}}\] done
clear
C)
\[N{{a}^{++}}\] done
clear
D)
\[H{{a}^{++}}\] done
clear
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question_answer34)
Enzymes are destroyed
A)
At very low temperature done
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B)
During chemical reaction done
clear
C)
At very high temperature done
clear
D)
Below freezing point done
clear
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question_answer35)
Dry seeds can endure higher temperature than the germinating seeds because [CPMT 1979]
A)
Dry seeds have more reserve food done
clear
B)
Hydration makes the enzymes more sinsitive to temperature done
clear
C)
Dry seeds are hard done
clear
D)
The seedlings are tender done
clear
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question_answer36)
In seeds, digestion is made possible at relatively low temperature by [CPMT 1984]
A)
Proteins done
clear
B)
Enzymes done
clear
C)
Auxins done
clear
D)
Nitrogenous complex substances done
clear
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question_answer37)
Zymogens are [MP PMT 1984; JIPMER 1987, 88; BHU 1988]
A)
Enzyme acting upon starch done
clear
B)
Group of zymase enzymes done
clear
C)
Inactive enzyme precursors done
clear
D)
None of the above done
clear
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question_answer38)
Enzymes which are slightly different in molecular structure but can perform identical activity are called [BHU 1991]
A)
Isoenzymes done
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B)
Holoenzymes done
clear
C)
Apoenzymes done
clear
D)
Coenzymes done
clear
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question_answer39)
Enzyme having different molecular arrangement but similar functions is [BVP 2003, 04]
A)
Isoenzyme done
clear
B)
Holoenzyme done
clear
C)
Apoenzyme done
clear
D)
Co-enzyme done
clear
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question_answer40)
Lactic dehydrogenase (LDH) which catalyzes pyruvate to lactate is an example of [AMU 1989]
A)
Apoenzyme done
clear
B)
Antienzyme done
clear
C)
Isoenzyme done
clear
D)
Coenzyme done
clear
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question_answer41)
Which one statement regarding isoenzyme is correct
A)
Enzymes physically identical and performing similar functions are called isoenzymes done
clear
B)
Enzymes chemically identical and performing similar functions are called isoenzymes done
clear
C)
Enzymes which are physically and chemically identical and performing similar functions are called isoenzymes done
clear
D)
All statements are correct done
clear
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question_answer42)
The non-protein enzyme is [MHCET 2000]
A)
Ribozyme done
clear
B)
Pepsin done
clear
C)
Trypsin done
clear
D)
All of the above done
clear
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question_answer43)
Enzymes are sensitive to [BHU 1986]
A)
Rainfall done
clear
B)
Light done
clear
C)
pH done
clear
D)
Wind velocity done
clear
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question_answer44)
Enzymes are sensitive to [MP PMT 1999]
A)
Cold done
clear
B)
Cell wall done
clear
C)
Heat done
clear
D)
Pressure done
clear
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question_answer45)
Pepsin is inactivated at pH [BHU 2003]
A)
Below 3 done
clear
B)
Below 2 done
clear
C)
Above 5 done
clear
D)
Above 3 done
clear
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question_answer46)
The given graph shows the effect of substrate concentration on the rate of reaction of the enzyme green gram-phosphatase
What does the graph indicate [AIIMS 2005]
A)
The rate of enzyme reaction is directly proportional to the substrate concentration done
clear
B)
Presence of an enzyme inhibitor in the reaction mixture done
clear
C)
Formation of an enzyme-substrate complex done
clear
D)
At higher substrate concentration the pH increase done
clear
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