Punjab 9th Class Biology Chapter 6 Enzymes Mcqs Test Online Punjab 9th Class Biology Chapter 6 Enzymes Punjab 9th Class 123456 Question 1 of 6Biology 1. What is TRUE about cofactors? Help facilitate enzyme activity Are composed of proteinsIncrease activation energy Break hydrogen bonds in proteins Question 1 of 6Question 2 of 6 2. Prosthetic groups are; Tightly bound to enzymeRequired by all enzymes Loosely attached with enzymes Proteins in nature Question 2 of 6Question 3 of 6 3. What is TRUE about enzymes? They make biochemical reactions to proceed spontaneouslyThey are needed in large quantitiesThey lower the activation energy of a reaction They are not very specific in their choice of substrates Question 3 of 6Question 4 of 6 4. To what category of molecules do enzymes belong? LipidsCarbohydrates ProteinsNucleic acids Question 4 of 6Question 5 of 6 5. 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 site have been occupied by substrate molecules The enzyme molecules have denatured More substrate acted as inhibitor More substrate has disturbed the pH of the medium Question 5 of 6Question 6 of 6 6. Which of these graphs correctly shows the effect of temperature on the rate of an enzyme-controlled reaction? DCABQuestion 6 of 6 Loading... Test By Subject Punjab Test By Topics 9th Class Biology You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.