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 56 Class 9 Biology Chapter 6 Practice MCQs Test No 1 1 / 15 If organic cofactors are tightly bound to enzyme, they are called: Prosthetic groups None of these Both a & b Coenzymes 2 / 15 The concept of metabolism was first of all given by: Ibn-e-Nafees Daniel Koshland Emil Fischer Winhelm Kuhne 3 / 15 Who first time used the term enzyme? Daniel Koshland Emil Fischer lbn-e-Nafees Winhelm Kuhne 4 / 15 If organic cofactors are loosely attached with enzyme, they are called: Both a & b None of these Coenzymes Prosthetic groups 5 / 15 The molecules on which enzymes act are called: Co-enzyme Proteins Substrates Enzyme substrates complex 6 / 15 When the term enzyme was used for the first time? 1876 1878 1874 1880 7 / 15 Chemically enzymes are: Fats Carbohydrates Protein Lipids 8 / 15 Almost all the enzymes are: Carbohydrates Fats Protein Vitamins 9 / 15 The term metabolism is derived from: Latin Word French word Greek word Italian word 10 / 15 Which of the following is not true about enzymes? They increase the activation energy Enzymes speed up biochemical reactions They lower the activation energy They act as biocatalysts 11 / 15 Which one is an organic cofactor? Flavin Heme None of these Both a & b 12 / 15 The term Metabolism is derived from the Greek words means: Break Division Split Change 13 / 15 The catalytic region of enzyme is called: Active site Prosthetic group Coenzyme Cofactor 14 / 15 Enzymes lower the activation energy in the ways: They may alter the shape of substrate 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 15 / 15 To which group of molecules enzymes belong? Nucleic acids Lipids Proteins Carbohydrates Your score is LinkedIn Facebook Twitter VKontakte 0% Restart quiz Send feedback Practice MCQs Test No 2 /14 50 Class 9 Biology Chapter 6 Practice MCQs Test No 2 1 / 14 Starch is broken down by an enzyme called: Lipase Pepsin Amylase All of these 2 / 14 When there is an increase in temperature, the rate of enzyme catalyzed reactions: Decreases All of these Remains constant Increases 3 / 14 Which of the following vitamins act as coenzyme? Thiamine All of these Folic acid Riboflavin 4 / 14 The enzyme that acts on lipids: Protease Amylase Pepsin Lipase 5 / 14 Number of discovered enzymes so far: 1500 2500 2000 1000 6 / 14 Who proposed induced-fit model? Emil Fischer Daniel Koshland Winhelm Kuhne Ibn-e-Nafees 7 / 14 When was induced-fit model proposed? 1958 1956 1954 1952 8 / 14 Which enzymes are used in dish washing to remove resistant starch residues? Protease Lipase Amylase All of these 9 / 14 When was lock and key model proposed? 1894 1896 1890 1898 10 / 14 The enzymes used for the removal of protein stains from clothes? Protease All of these Amylase Lipase 11 / 14 Which of the following is not true about induced fit model? Active site is molded into the required shape. It is more acceptable model According to this model active site is not rigid structure This model explains specificity of enzymes 12 / 14 The peptide bonds in proteins are broken down by: Amylase Protease All of these Lipase 13 / 14 Who proposed lock and key model? Emil Fischer Daniel Koshland Ibn-e-Nafees Winhelm Kuhne 14 / 14 The optimum temperature for the maximum working speed of human enzymes is: 37°C 43°C 39°C 35°C 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.