Biology 9 Chapter 6 MCQs Tests by admin | Class 9 MCQs Tests | 0 comments In this post, we have prepared 2 MCQs tests of Federal Board Biology 9 Chapter 6 MCQs Tests. For more Class 9 Biology MCQs Tests visit this page. Biology 9 Chapter 6 MCQs Tests Practice MCQs Test No 1 /15 3 Class 9 Biology Chapter 6 Practice MCQs Test No 1 1 / 15 Enzymes lower the activation energy in the ways: All of these They may lower activation energy by bringing substrates in the correct orientation to react Some enzymes do so by disrupting the charge distribution on substrates They may alter the shape of substrate 2 / 15 Almost all the enzymes are: Carbohydrates Fats Protein Vitamins 3 / 15 The catalytic region of enzyme is called: Cofactor Prosthetic group Coenzyme Active site 4 / 15 The term Metabolism is derived from the Greek words means: Division Change Split Break 5 / 15 Who first time used the term enzyme? Emil Fischer Winhelm Kuhne lbn-e-Nafees Daniel Koshland 6 / 15 When the term enzyme was used for the first time? 1878 1876 1880 1874 7 / 15 The term metabolism is derived from: French word Italian word Greek word Latin Word 8 / 15 If organic cofactors are tightly bound to enzyme, they are called: Prosthetic groups None of these Coenzymes Both a & b 9 / 15 The concept of metabolism was first of all given by: Winhelm Kuhne Daniel Koshland Ibn-e-Nafees Emil Fischer 10 / 15 To which group of molecules enzymes belong? Carbohydrates Proteins Nucleic acids Lipids 11 / 15 Which one is an organic cofactor? Both a & b Flavin Heme None of these 12 / 15 The molecules on which enzymes act are called: Substrates Enzyme substrates complex Proteins Co-enzyme 13 / 15 Chemically enzymes are: Carbohydrates Fats Protein Lipids 14 / 15 If organic cofactors are loosely attached with enzyme, they are called: Prosthetic groups None of these Coenzymes Both a & b 15 / 15 Which of the following is not true about enzymes? They act as biocatalysts Enzymes speed up biochemical reactions They increase the activation energy They lower the activation energy Your score is LinkedIn Facebook Twitter VKontakte 0% Restart quiz Send feedback Practice MCQs Test No 2 /14 2 Class 9 Biology Chapter 6 Practice MCQs Test No 2 1 / 14 Starch is broken down by an enzyme called: All of these Lipase Pepsin Amylase 2 / 14 When there is an increase in temperature, the rate of enzyme catalyzed reactions: All of these Decreases Increases Remains constant 3 / 14 Which of the following vitamins act as coenzyme? Thiamine Folic acid All of these Riboflavin 4 / 14 Which of the following is not true about induced fit model? Active site is molded into the required shape. According to this model active site is not rigid structure It is more acceptable model This model explains specificity of enzymes 5 / 14 When was lock and key model proposed? 1896 1894 1890 1898 6 / 14 The optimum temperature for the maximum working speed of human enzymes is: 39°C 35°C 43°C 37°C 7 / 14 Which enzymes are used in dish washing to remove resistant starch residues? All of these Amylase Lipase Protease 8 / 14 The enzyme that acts on lipids: Protease Pepsin Lipase Amylase 9 / 14 Number of discovered enzymes so far: 2000 1500 1000 2500 10 / 14 Who proposed lock and key model? Emil Fischer Daniel Koshland Ibn-e-Nafees Winhelm Kuhne 11 / 14 Who proposed induced-fit model? Emil Fischer Winhelm Kuhne Daniel Koshland Ibn-e-Nafees 12 / 14 When was induced-fit model proposed? 1956 1954 1952 1958 13 / 14 The enzymes used for the removal of protein stains from clothes? All of these Amylase Lipase Protease 14 / 14 The peptide bonds in proteins are broken down by: All of these Amylase Protease Lipase Your score is LinkedIn Facebook Twitter VKontakte 0% Restart quiz Send feedback Submit a Comment Cancel replyYou must be logged in to post a comment.