Class 9th Biology Chapter 6


Total Marks: 32

1. When was induced fit model presented ?
1858 1956 1977 1999
2. Lock and Key model was prepared in ?
1824 1894 1814 1824
3. In 1894 \" Lock and Key model proposed by \"
Aristotle Robert Hooke Emil Fisher Louis pasture
4. Who proposed the induced fit model of enzyme action ?
Emil Fischer Daniel koshlind Ibn-e-nafees jabir bin hayyan
5. In which process in which larger molecules are breake down into smaller is :
catabolism anabolism metabolism both a.b
6. Which process released energy?
metabolism anabolism catabolism all the above
7. Who is an example of extracellular enzyme ?
Pepsin Proteins Lipid all the above
8. Which German physiologist first used the term enzyme ?
John Ray Winhelm kuhne tournefort caesalipino
9. When did term enzyme first used ?
1878 1872 1873 1873
10. Which vitamins act as co enzymes?
Riboflavin Thiamine folic acid all the above
11. In biological detergent ,which enzyme is used to remove resistant starch residues while dish washing ?
Vitamin enzymes Emiliez protease thiamin
12. Who was Emile Fisher who introduced the Lock End model?
German biologist German chemist Russian chemist English chemist
13. The kind of protein which catalyze a biochemical reaction called :
Enzymes Hormones co enzymes none of these
14. When organic co factors are tightly bound to enzyme :
Coenzymes Apoenzymes cofactor prosthetic group
15. Enzyme pepsin works in -----.
mouth intestine desophagus stomach
16. What is true about enzymes?
They make biochemical reactions to proceed spontaneously They lower the activation energy of a reaction They are not very specific in their choice of substrate They are needed in large quantities
17. To what category of molecules do enzymes belong?
Proteins Lipids Nucleic acid Carbohydrates
18. What is true about cofactors?
Break hydrogen bonds in proteins Help facilitate enzyme activity Increase activation energy Are composed of proteins
19. Prosthetic groups are:
Required by all enzymes Proteins in nature Tightly bound to enzymes Loosely attached with enzymes
20. When we add more substrate to an already occurring enzymatic reaction and there is no increase in the rate of reaction what would you predict?
All active sights have been occupied by substrate molecules he enzyme molecule have denatured More substrate acted as inhibitor More substrate has disturbed the pH of medium
21. Who first used the term Enzyme?
Zacharias Johnson Robert Brown Winholm Kuhne Louis pasture
22. Metabolism is derived from Greek word meaning.
Division Change Deduction Matter
23. Which scientist gave the concept of Metabolism first?
Ibn-e-Nafees Jabir Newton William
24. In metabolism works as catalyst.
Enzyme Vitamins Protein Lipids
25. All biochemical reactions occurring in living organisms necessary for life are called as.
Metabolishm Anabolism Catabolism Mutualism
26. The molecule at which enzyme act is called.
Active site Cofactor Prosthetic group Substrate
27. Biochemical reactions in which larger compounds are synthesized called.
Metabolism Anabolism Catabolism Decomposition
28. Protein is digested by.
Lipase Amylase Protease Nuclease
29. Starch is broken down by an enzyme called.
Amylase Lipase Tripsin Pepsin
30. Lipase enzyme act on.
Carbohydrates Proteins Lipids Starch
31. Enzyme Lipase act on on lipids and convert them into.
Acetic acid Lactic acid Fatty acid and glycerols Ascorbic acid
32. Specificity of enzymes depend upon.
Temperature Concentration of substrates Shape of active sites pH