CH-3 Enzymes Leave a Comment / By abdulslambsn@gmail.com / October 6, 2025 Welcome To Your Quiz "CH-3 Enzymes" Click on "Start Quiz" To Continue... 1. An activated enzyme made of polypeptide chain and a co-factor is: Co-enzyme Substrate Apoenzyme Holoenzyme None 2. Koshland in 1959 proposed the modified form of: Unit membrane model Reflective index model Fluid mosaic model Induce fit model None 3. The detachable co-factor of an enzyme (if it is an inorganic ion) is called as: Activator Catalytic Apoenzyme Aqueous medium None 4. Medium required for enzymes vigorous activity: Colloidal Transparent Aqueous Gel None 5. Every enzyme functions effectively at: 9.00 pH Optimum pH 2.00 pH 7.00 pH None 6. The enzyme involved in the cellular respiration in the eukaryotes are found in: Chloroplast Mitochondria Aqueous medium None 7. The active site of an enzyme is composed of binding site and: Apoenzyme Catalytic Enzyme Prosthetic Group Substrate site None 8. The optimum pH value of pancreatic lipase is: 7.00 8.00 9.00 10.0 None 9. Almost all enzymes are: Fibrous proteins Globular proteins Triangular protection All of the above None 10. Even Traces of enzymes can bring about change in large amount of: Catalytic Substarte Activator Optimum None 11. Photosynthesis: Oral cavity Vitamin Globular protein Chloroplast None 12. Inhibitors: Temperature Cyanide Lock & Key model Specific in action None 13. Enzymes: Temperature Cyanide Lock & Key model Specific in action None 14. Activation energy: Temperature Cyanide Lock & Key model Specific in action None 15. Emil Fisher: Temperature Cyanide Lock & Key model Specific in action None 16. Amino acid: Globular protein Oral Cavity Chloroplast Vitamin None 17. Optimum pH value for pepsin is: 5.5 7.4 1.4 4 None 18. Chemical nature of enzymes is: Lipids Steroids Proteinaceous All of above None 19. The enzymes are sensitive to: Change in pH Change in temperature Both A & B None of these None 20. Who proposed "lock and key model" to study enzyme-substrate interaction: Koshland (1959) Fisher (1958) Willhelm Kuhne (1878) None None 21. The enzyme minus its co-enzyme is referred to as: Isoenzyme Apoenzyme Both None None 22. Non protein components of enzymes are known as: Coenzymes Activators Cofactors All of above None 23. Consider this reaction A + B → C + D + energy This reaction is exergonic And enzyme could speed the reaction A and B are reactants and C and D are products All of above None 24. And un-catalysed reaction requires a: Higher activation energy Lower activation energy Moderate activation energy None None 25. Many enzymes function by _______ the activation energy of the reaction: Increasing Promoting Lowering All of above None 26. The binding of the substrate to the enzyme alters the structure of the enzyme: Lock and key hypothesis Induced fit hypothesis Fisher's hypothesis None None 27. An enzyme is generally named by adding ______ to the end of the name of the: "-ase". Coenzyme "-ose". Substrate "-ase". Apoenzyme "-ase". Substrate None 28. Enzyme function as: Organic catalyst Inorganic catalyst Inhibitors All of above None 29. When the final product of the metabolic pathway turn off the first step of the metabolic pathway it is: Positive feedback Negative feedback Comparative feedback Both A & C None 30. The enzymes are classified into: Four groups Five groups Six groups Seven groups None 31. Non protinious part of hollow enzyme is: Prosthetic group Apoenzyme Holoenzyme None None 32. The function of competitive inhibitors is defined by there ability to interact or bind to: Active site of the enzyme Competitive inhibitors Substrate complex None None 33. What is cofactor: Inorganic Ion Organic Molecules Both A & B Nome None 34. Zn⁺² is an inorganic activator for enzyme: Carbonic Anhydrase Phosphate Chymotrypsin Maltase None 35. DDT and parathion are inhibitors of key enzymes in: Nervous System Respiratory system Digestive system Circulatory system None 1 out of 7 Thanks For Taking This Quiz - Please See Your Answers/Results Below After Entering Your Name & Email... Name Email Time's up
