JEE & NEETNEET Biology NEET Biology 11 th & 12 th 100+ MCQ & Answer | Page-02 | JEE & NEET MCQ February 4, 2025 DSN MARATHI 11. The “Lock and key” theory of enzyme action was put forward by A. Koshland B. Fischer C. Kuhne D. Arrhenius Answer Option : B 12. Allosteric enzymes possess A. Three types of allosteric sites B. Active site and three types of allosteric sites C. Active site and two types of allosteric sites D. Active site and an allosteric site Answer Option : D 13. Enzymes that are involved in the feedback inhibition are known as A. Apoenzymes B. Holoenzymes C. Allosteric enzymes D. coenzymes Answer Option : C 14. The control and regulation of biological processes involve some enzymes. They are known as A. inhibitors B. regulators C. allosteric enzymes D. activators Answer Option : C 15. The fastest enzyme is A. carbonic anhydrase B. pepsin C. DNA polymerase D. DNA gyrase Answer Option : A 16. Allosteric enzymes consist of several A. polypeptide chains B. inhibitors C. temperature ranges D. active sites Answer Option : A 17. What are the non-substrate molecules binding to the allosteric sites called? A. allosteric substrate B. reactants C. allosteric modulators D. inhibitors Answer Option : C 18. The allosteric enzymes on the top of active sites contain A. substrate B. inhibitors C. polypeptide chains D. allosteric sites Answer Option : D 19. Blocking of enzymes action by blocking its active site is A. feedback inhibition B. allosteric inhibition C. competitive inhibition D. non- competitive inhibition Answer Option : C 20. Allosteric enzymes are A. smaller than simple enzymes B. larger than simple enzymes C. smaller than simple enzymes but not complex D. larger and more complex than simple enzymes Answer Option : D
11. The “Lock and key” theory of enzyme action was put forward by A. Koshland B. Fischer C. Kuhne D. Arrhenius Answer Option : B
12. Allosteric enzymes possess A. Three types of allosteric sites B. Active site and three types of allosteric sites C. Active site and two types of allosteric sites D. Active site and an allosteric site Answer Option : D
13. Enzymes that are involved in the feedback inhibition are known as A. Apoenzymes B. Holoenzymes C. Allosteric enzymes D. coenzymes Answer Option : C
14. The control and regulation of biological processes involve some enzymes. They are known as A. inhibitors B. regulators C. allosteric enzymes D. activators Answer Option : C
15. The fastest enzyme is A. carbonic anhydrase B. pepsin C. DNA polymerase D. DNA gyrase Answer Option : A
16. Allosteric enzymes consist of several A. polypeptide chains B. inhibitors C. temperature ranges D. active sites Answer Option : A
17. What are the non-substrate molecules binding to the allosteric sites called? A. allosteric substrate B. reactants C. allosteric modulators D. inhibitors Answer Option : C
18. The allosteric enzymes on the top of active sites contain A. substrate B. inhibitors C. polypeptide chains D. allosteric sites Answer Option : D
19. Blocking of enzymes action by blocking its active site is A. feedback inhibition B. allosteric inhibition C. competitive inhibition D. non- competitive inhibition Answer Option : C
20. Allosteric enzymes are A. smaller than simple enzymes B. larger than simple enzymes C. smaller than simple enzymes but not complex D. larger and more complex than simple enzymes Answer Option : D
