Solved papers for NEET Biology NEET PYQ-Enzyme

done NEET PYQ-Enzyme Total Questions - 31

• question_answer1) Feed back inhibition of an enzymatic reaction is caused by: [AIPMT 2000]
  A)
  substrate
  done clear
  B)
  enzyme
  done clear
  C)
  end product
  done clear
  D)
  rise in temperature
  done clear
  View Answer play_arrow

• question_answer2) Enzymes enhance the rate of a reaction by: [AIPMT 2000]
  A)
  lowering the activation energy of the reaction
  done clear
  B)
  combining with the product as soon as it is formed
  done clear
  C)
  forming a reactant-product complex
  done clear
  D)
  changing the equilibrium point of the reaction
  done clear
  View Answer play_arrow

• question_answer3) Hydrolytic enzymes, which act at low pH are called as: [AIPMT 2002]
  A)
  proteases
  done clear
  B)
  \[\alpha \]-amylases
  done clear
  C)
  hydrolases
  done clear
  D)
  peroxidases
  done clear
  View Answer play_arrow

• question_answer4) In which one of the following enzymes, copper is necessarily associated as an activator? [AIPMT (S) 2004]
  A)
  Carbonic anhydrase
  done clear
  B)
  Tryptophanase
  done clear
  C)
  Lactic dehydrogenase
  done clear
  D)
  Tyrosinase
  done clear
  View Answer play_arrow

• question_answer5) Which one of the following hydrolyses internal phosphodiester bonds in a polynucleotide chain? [AIPMT (S) 2005]
  A)
  Lipase
  done clear
  B)
  Exonuclease
  done clear
  C)
    Endonuclease
  done clear
  D)
  Protease
  done clear
  View Answer play_arrow

• question_answer6) G-6-P dehydrogenase deficiency is associated with haemolysis of: [AIPMT (S) 2005]
  A)
  lymphocytes
  done clear
  B)
  RBCs
  done clear
  C)
  platelets
  done clear
  D)
  leucocytes
  done clear
  View Answer play_arrow

• question_answer7)             Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these: [AIPMT (S) 2005]
  A)
  enhance oxidative metabolism
  done clear
  B)
  are conjugated proteins
  done clear
  C)
  are exclusively synthesized in the body of a living organism as at present
  done clear
  D)
  help in regulating metabolism
  done clear
  View Answer play_arrow

• question_answer8) Which of the following statements regarding enzyme inhibition is correct? [AIPMT (S) 2005]
  A)
  Non-competitive inhibition of an enzyme can he overcome by adding large amount of substrate
  done clear
  B)
  Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein
  done clear
  C)
  Competitive inhibition is seen when the substrate and the inhibitor compete
  done clear
  D)
   Non-competitive inhibitors often bind to the enzyme irreversibly
  done clear
  View Answer play_arrow

• question_answer9) The catalytic efficiency of two different enzymes can be compared by the: [AIPMT (S) 2005]
  A)
  the Revalue
  done clear
  B)
  the pH optimum value
  done clear
  C)
  formation of the product
  done clear
  D)
  None of thise
  done clear
  View Answer play_arrow

• question_answer10) An organic substance bound to an enzyme and essential for its acvity is called: [AIPMT (S) 2006]
  A)
  coenzyme
  done clear
  B)
  holoenzyme
  done clear
  C)
  apoenzyme
  done clear
  D)
  isoenzyme
  done clear
  View Answer play_arrow

• question_answer11) An enzyme that can stimulate germination of barley seeds is: [AIPMT (S) 2006]
  A)
  \[\alpha \]-amylase
  done clear
  B)
  lipase
  done clear
  C)
  protease
  done clear
  D)
  invertase
  done clear
  View Answer play_arrow

• question_answer12) Lysozyme that is present in perspiration, saliva and tears, destroys: [AIPMT (S) 2007]
  A)
  certain fungi
  done clear
  B)
  certain types of bacteria
  done clear
  C)
  all viruses
  done clear
  D)
  most virus-infected cells
  done clear
  View Answer play_arrow

• question_answer13) All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is: [AIPMT (S) 2007]
  A)
  lactate dehydrogenase
  done clear
  B)
  isocitrate dehydrogenase
  done clear
  C)
  malate dehydrogenase
  done clear
  D)
  succinate dehydrogenase
  done clear
  View Answer play_arrow

• question_answer14) Modem detergents contain enzyme preparations of [AIPMT (S) 2008]
  A)
  acidophiles
  done clear
  B)
  alkaliphiles
  done clear
  C)
  thermoacidophiles
  done clear
  D)
  thermophiles
  done clear
  View Answer play_arrow

• question_answer15) A competitive inhibitor of succinic dehydrogenase is [AIPMT (S) 2008]
  A)
  malonate
  done clear
  B)
  oxaloacetate
  done clear
  C)
  \[\text{ }\!\!\alpha\!\!\text{ -}\]ketoglutarate
  done clear
  D)
  malate
  done clear
  View Answer play_arrow

• question_answer16) Which one of the following is resistant to enzyme action? [AIPMT (S) 2008]
  A)
  Cork
  done clear
  B)
  Wood fibre
  done clear
  C)
  Pollen exine
  done clear
  D)
  Leaf cuticle
  done clear
  View Answer play_arrow

• question_answer17) Which one of the following pairs is wrongly matched? [AIPMT (S) 2009]
  A)

  Detergents

  Lipase

  done clear
  B)

  Alcohol	Nitrogenase
  done clear C) Fruit juice Pectinase done clear D) Textile    Amylase done clear View Answer play_arrow question_answer18)  The figure given below shows the conversion of a substrate into product by an enzyme. In which one of the four options (a-d), the components of reaction labelled as A, B, C and D are identified correctly? [AIPMT (M) 2010] A) Potential energy Transition state Activation energy with enzyme Activation energy without enzyme done clear B) Transition energy Potential energy Activation energy  without enzyme Activation energy with enzyme done clear C) Potential energy Transition state Activation energy with enzyme Activation energy without enzyme done clear D) Activation energy with enzyme Transition state Activation energy without enzyme Potential energy done clear View Answer play_arrow question_answer19) Three of the following statements about enzymes are correct and one is wrong. Which one is wrong? [AIPMT (M) 2010] A) Enzymes require optimum pH for maximal activity done clear B) Enzymes are denatured at high temperature but in certain exceptional organisms they are effective even at temperatures \[80{}^\circ -90{}^\circ C\] done clear C) Enzymes are highly specific done clear D) Most enzymes are proteins but some are lipids done clear View Answer play_arrow question_answer20)  The curve given below shows enzymatic activity with relation to three conditions (pH, temperature and substrate concentration)  [AIPMT (S) 2011] What do the two axises (X and Y) represent? A) temperature                      enzyme activity done clear B) substrate concentration  enzymatic activity done clear C) enzymatic activity               temperature done clear D) enzymatic activity         Ph done clear View Answer play_arrow question_answer21) For its activity, carboxypeptidase requires [AIPMT (M) 2012] A) zinc done clear B) iron done clear C) niacin done clear D) copper done clear View Answer play_arrow question_answer22) Transition state structure of the substrate formed during an enzymatic reaction is [NEET 2013] A) transient but stable done clear B) permanent but unstable done clear C) transient and unstable done clear D) permanent and stable done clear View Answer play_arrow question_answer23) Which of the following is not correctly matched for the organism and its cell wall degrading enzyme? [NEET 2013] A) Bacteria     Lysozyme         done clear B) Plant cells    Cellulase                       done clear C) Algae        Methylase                   done clear D) Fungi        Chitinase     done clear View Answer play_arrow question_answer24)                The essential chemical components of many coenzymes are [NEET 2013] A) proteins done clear B) nucleic acids done clear C) carbohydrates done clear D) vitamins done clear View Answer play_arrow question_answer25) Select the option which is not correct with respect to enzyme action. [NEET 2014] A) Substrate binds with enzyme as its active site done clear B) Addition of lot of succinate does not reverse the inhibition of succinic dehydrogenase by malonate done clear C) A non-competitive inhibitor binds the enzyme at a site distinct from that which binds the substrate done clear D) Malonate is a competitive inhibitor of succinic dehydrogenase done clear View Answer play_arrow question_answer26) The enzyme recombinase is required at which stage of meiosis? [NEET 2014] A) Pachytene done clear B) Zygotene done clear C) Diplotene done clear D) Diakinesis done clear View Answer play_arrow question_answer27) Which one of the following statements is incorrect?  [NEET 2015] A) A competitive inhibitor reacts reversibly with the enzyme to form an enzyme-inhibitor. done clear B) In competitive inhibition the inhibitor molecule is not chemically changed by the enzyme. done clear C) The competitive inhibitor does not affect the rate of breakdown of the enzyme-substrate complex. done clear D) The presence of the competitive inhibitor decreases the km of the enzyme for the substrate. done clear View Answer play_arrow question_answer28) A non - proteinaceous enzyme is [NEET - 2016 Phase-II] A) Lysozyme done clear B) Ribozyme done clear C) Ligase done clear D) Deoxyribonuclease done clear View Answer play_arrow question_answer29)  Which of the following describes the given graph correctly? [NEET - 2016 Phase-II] A) Endothermic reaction with energy A in presence of enzyme and B in absence of enzyme done clear B) Exothermic reaction with energy A in presence of enzyme and B in absence of enzyme done clear C) Endothermic reaction with energy A in absence of enzyme and B in presence of enzyme done clear D) Exothermic reaction with energy A in absence of enzyme and B in presence of enzyme done clear View Answer play_arrow question_answer30) Which one of the following statements is correct, with reference to enzymes? [NEET-2017] A) Holoenzyme = Coenzyme + Cofactor done clear B) Apoenzyme = Holoenzyme + Coenzyme done clear C) Holoenzyme = Apoenzyme + Coenzyme done clear D) Coenzyme = Apoenzyme + Holoenzyme done clear View Answer play_arrow question_answer31)  Consider the following statements:[NEET 2019] [A] Coenzyme of metal ion that is tightly bound to enzyme protein is called prosthetic group. [B] A complete catalytic active enzyme with its bound prosthetic group is called apoenzyme Select the correct option- A) Both [A] and [B] are false done clear B) [A] is false but [B] is true done clear C) Both [A] and [B] are true done clear D) [A] is true but [B] is false done clear View Answer play_arrow Study Package NEET PYQ-Enzyme   Buy Now     Please Wait you are being redirected.... You need to login to perform this action. You will be redirected in 3 sec × Reset Password. Email : Send Password Cancel Add Mobile Enter Mobile Number Submit Logout Enter OTP OTP has been sent to your mobile number and is valid for one hour Enter One Time Password Submit Change Mobile: Submit Logout Mobile Number Verified Your mobile number is verified. Close Free Videos × For free video lectures fill in the form below and we will get back to you. * Email Address: * Mobile Number: Submit Cancel