[{"id":268946,"question":"Which of the followig are not changed during the biochemical reactions.","choices":[{"text":"Substrate","value":"A"},{"text":"Enzymes","value":"B"},{"text":"Products","value":"C"},{"text":"ES complex","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":268945,"question":"In the presence of enzymes, reactions proceed at a.","choices":[{"text":"Slower rate","value":"A"},{"text":"Faster rate","value":"B"},{"text":"Very slow rate","value":"C"},{"text":"Medium rate","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":268944,"question":"ionization of amino acids at the activ esite is affected by.","choices":[{"text":"Change in pH","value":"A"},{"text":"Change in temperature","value":"B"},{"text":"Change in substrate conceration","value":"C"},{"text":"Change is tempeaure and substrate concentration","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":268943,"question":"The active site of an enzyme","choices":[{"text":"Never changes","value":"A"},{"text":"Forms no chemical bond with substrate","value":"B"},{"text":"Determines by its structur ethe specificity of the enzyme","value":"C"},{"text":"Looks like a lump projecting from the surface of an enzyme.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":268942,"question":"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.","choices":[{"text":"Denaturation","value":"A"},{"text":"Saturation","value":"B"},{"text":"Desaturation","value":"C"},{"text":"Inhibition","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":268941,"question":"The catalytic region on enzyme recognizes and binds the substrate and carries the reaction. This region is called as.","choices":[{"text":"Cofactor","value":"A"},{"text":"Active sites","value":"B"},{"text":"Activator","value":"C"},{"text":"Inhibitor","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":268940,"question":"What is true about cofactors.","choices":[{"text":"Help facilitate enzymes activity","value":"A"},{"text":"Are composed of proteins","value":"B"},{"text":"Break hydrogen bond in proteins","value":"C"},{"text":"Increase activation energy","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":268939,"question":"What is true about the optimun pH values of the followign enzyes of digestive system.","choices":[{"text":"Both work at high pH","value":"A"},{"text":"Both work at low pH","value":"B"},{"text":"Pepsin works at low pH while trypsin works at high pH","value":"C"},{"text":"Pepsin works at high pH while trypsin works at low pH","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":268938,"question":"Which is true about enzyme.","choices":[{"text":"All enzymes are not protein","value":"A"},{"text":"All enzymes are proteins","value":"B"},{"text":"All proteins are enzyme","value":"C"},{"text":"All enzymes are vitamins","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":268937,"question":"Whcih does consume energy","choices":[{"text":"Catabolism","value":"A"},{"text":"Metabolism","value":"B"},{"text":"Anabolism","value":"C"},{"text":"Both a and b","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":268936,"question":"Whcih does yield energy.","choices":[{"text":"Anabolism","value":"A"},{"text":"Catabolism","value":"B"},{"text":"Metabolism","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":268935,"question":"The biochemical reactions in which larger molecules are broken down are called","choices":[{"text":"Metabolism","value":"A"},{"text":"Catabolism","value":"B"},{"text":"anabolism","value":"C"},{"text":"Mutualism","value":"D"},{"value":"E"}],"correctAnswer":2}]