Punjab 11th Class Biology Chapter 3 Enzymes Mcqs Test Online Biology Chapter 3 Enzymes Mcqs Test Online 11th Class Punjab 12345678910111213Show paginator Hide paginator 8% Question 1 of 13Biology 1. A essential feature of a competitive inhibitor is its ability to: Occupy an active site Activate an operator gene Modify a substrate Combine with prosthetic group Question 1 of 13Question 2 of 13 2. Which of the following has a coenzyme activity? Both “a” and “b” NAD’ None of theseCa‘ ’ Question 2 of 13Question 3 of 13 3. Erypsin is an example of? Nucleases Carbohydrates Proteases Lipases Question 3 of 13Question 4 of 13 4. Non-competitive inhibitors react with enzymes at: Allosteric site None of these Both a and b Active site Question 4 of 13Question 5 of 13 5. How does an enzyme increase the rate of a reaction? By shifting the point of equilibrium of the reaction By increasing the rate of random collisions or molecules By supplying the energy required to start the reactionBy bringing the reacting molecules into precise orientation Question 5 of 13Question 6 of 13 6. The reaction rate of salivary amylase with starch decreases as the concentration of chloride ions is reduced. Which of the following describe the role of the chloride ions? Allosteric inhibitors Cofactors Competitive inhibitorCoenzyme Question 6 of 13Question 7 of 13 7. The graph shows the effect of an enzyme on a reaction. Which combination identifies X, Y and Z? X Y Z ACatalyzed reactionUncatalyzed reactionActivation energyBCatalyzed reactionUncatalyzed reactionEnergy lost during reactionCUncatalyzed reactionCatalyzed reactionEnergy gained by productDUncatalyzed reactionCatalyzed reactionOverall energy changeB A C D Question 7 of 13Question 8 of 13 8. Which graph shows the expected relationship between enzyme activity and substrate concentration? B D A C Question 8 of 13Question 9 of 13 9. Many enzymes are secreted in inactive form to protect Cell membrane Mitochondria Cell proteins Cell DNAQuestion 9 of 13Question 10 of 13 10. Ribozymes consist of: Only protein Protein + none protein part Only RNA None of these Question 10 of 13Question 11 of 13 11. The catalytic activity of an enzyme is restricted to its small portion called: Passive site Regulation site Allosteric site Active site Question 11 of 13Question 12 of 13 12. Combination of apoenzyme and coenzyme produces: Holoenzyme Enzyme Isoenzyme Prosthetic group Question 12 of 13Question 13 of 13 13. The specificity of enzyme is due to their: Surface configuration Hydrogen bonding pH High molecular weight Question 13 of 13 Loading... Test By Subject Punjab Test By Topics 11th Class Biology You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.