Biology Fsc Part 1 Chapter 5 Online Test With Answers

Biology Fsc Part 1 Chapter 5 Online Test

Sr. # Questions Answers Choice
1 The temperature at which an enzyme works at its maximum rate is called. Specific temperature Maximum temperature Optimum temperature Initial temperature
2 Which of thefollowing can be affected by temperatur ein an enzyme Hydrogen bond Hydrophobic interaction  Hydrophilic interaction  Both a and b
3 Which of the following can affect enzyme activity pH Temperature Enzyme concentration  All of above
4 Which of the following represent induced fit model When substrate combines with the binding site,it induces change in enzyme structure Active site is not a rigid structure It is modified form of lock and key model All of above
5 The induced fit model was modified form of lock and key model was proposed by  Daniel Koshland Danieal Standford Emil Fischer Van Neil
6 Lock and key modl was proposed by Emil Fischer in. 1890 1882 1958 1894
7 Emil Fischer proposed that, Activesite is rigid Active site is flexible Active site undergomodification  All of above
8 Lock and key model of enzyme mechanism was proposed by  Emil Fisher Norman Haworth Daniel Koshland F-Sanger
9 In complez metaboic pathways, end products formed inhibit the. First enzyme First substrate First product Last enzyme
10 Activation energy is lowered by  Bringing reactants together in correct orientation Stressing particular chemical bonds of reactants Stabilizing bonds of substrate Both a and b
11 Catalytic site is adtivatid when  enzyme inhibitor complex is formed ES complex is formed Subsgtrate attaches at allosteric site Spontaneously
12 Which of the following is correct about enzymes. Enzymes increase the activation energy The presene of enxymes does not affet the natur eor properties of end products Enxymes are synthesized y endocrine cells Enxymes are fibrous proteins
13 the energy which works to destabilize existing chemical bonds is called. Dectivation energy Activation energy Ionization energy Potential energy
14 The speed of a chemicla reaction depends on the amount of. ATP H-ions Substrte Activation energy
15 When food is oxidized in cell, enxymes draw electrons from food molecules and transfer them to. Nicotinamide Adenine Dinucleotide Nicotinamide Ganine dinucleotide Nicotinamide cytosine dinucletide Nicotinamide Thymine Dinucleotide
16 The most important coenzyme in a cell is the hydrogen acceptor. NAD ATP FADH2 Co -enzyme Q
17 Co enzyms participate in enzyme catalyzed reactions, ofter by transporting . Electrons Hydrogen atoms Phosphate groups Both a and b
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