9th Class Biology Chapter Wise Online MCQ Test With Answers PDF

Biology 9th Class Urdu Medium Online Test

Sr. #	Questions	Answers Choice
1	Increase or decrease in temperture beyond the optimum temperature will	Increase the rate of reaction Not affect the rate of reaction Denature the enzyme Decrease the rate of reactions
2	Which of the followig are not changed during the biochemical reactions.	Substrate Enzymes Products ES complex
3	In the presence of enzymes, reactions proceed at a.	Slower rate Faster rate Very slow rate Medium rate
4	The active site of an enzyme	Never changes Forms no chemical bond with substrate Determines by its structur ethe specificity of the enzyme Looks like a lump projecting from the surface of an enzyme.
5	If you add more substrate to already occurrig enzymatic reaction and it has no effet on the rate of reaction. What is the form given to this situation.	Denaturation Saturation Desaturation Inhibition
6	The catalytic region on enzyme recognizes and binds the substrate and carries the reaction. This region is called as.	Cofactor Active sites Activator Inhibitor
7	What is true about cofactors.	Help facilitate enzymes activity Are composed of proteins Break hydrogen bond in proteins Increase activation energy
8	What is true about the optimun pH values of the followign enzyes of digestive system.	Both work at high pH Both work at low pH Pepsin works at low pH while trypsin works at high pH Pepsin works at high pH while trypsin works at low pH
9	Which is true about enzyme.	All enzymes are not protein All enzymes are proteins All proteins are enzyme All enzymes are vitamins
10	Whcih does consume energy	Catabolism Metabolism Anabolism Both a and b
11	Whcih does yield energy.	Anabolism Catabolism Metabolism None of these
12	The biochemical reactions in which larger molecules are broken down are called	Metabolism Catabolism anabolism Mutualism

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