NEET Biology Biomolecules / जैव-अणु Question Bank

done Classification and Factors Affecting Enzyme Total Questions - 46

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• question_answer4)
  In the modern system of nomenclature which one of the following enzyme occupies 1st position
  A)
  Oxidoreductase done clear
  B)
  Transferase done clear
  C)
  Hydrolase done clear
  D)
  Ligase done clear
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• question_answer19)
  Fumerase enzyme belongs to which class
  A)
  Oxidase done clear
  B)
  Carboxylase done clear
  C)
  Transferase done clear
  D)
  Lyases done clear
  View Solution play_arrow

• question_answer20)
  Enzyme phosphoglucomutase belongs to
  A)
  Oxidase done clear
  B)
  Lipase done clear
  C)
  Carboxylase done clear
  D)
  Isomerase done clear
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• question_answer26)
  Which of the following enzyme digests other enzymes
  A)
  Dehydrogenases done clear
  B)
  Lipases done clear
  C)
  Peptidases done clear
  D)
  Aldolases done clear
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• question_answer29)
  At boiling temperature an enzyme is
  A)
  Denatured done clear
  B)
  Inactivated done clear
  C)
  Killed done clear
  D)
  Unaffected done clear
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• question_answer32)
  At temperature just below the freezing point, the enzyme [CPMT 1979]
  A)
  Is slightly activated done clear
  B)
  Is destroyed done clear
  C)
  Is inactivated done clear
  D)
  Is unaffected done clear
  View Solution play_arrow

• 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
  View Solution play_arrow

• question_answer34)
  Enzymes are destroyed
  A)
  At very low temperature done clear
  B)
  During chemical reaction done clear
  C)
  At very high temperature done clear
  D)
  Below freezing point done clear
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• question_answer38)
  Enzymes which are slightly different in molecular structure but can perform identical activity are called [BHU 1991]
  A)
  Isoenzymes done clear
  B)
  Holoenzymes done clear
  C)
  Apoenzymes done clear
  D)
  Coenzymes done clear
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow

• 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
  View Solution play_arrow