MDCAT Biology Chapter 7 Enzymes Online Test With Answers

image
image
image

MDCAT Biology Chapter 7 Enzymes Online Test

Sr. # Questions Answers Choice
1 By adding _______in neutral pH, we get the optimum pH of pancreatic lipase 1 2 3 4
2 Which one of the following enzymes have slightly acidic pH as optimum pH? Sucrase Enterokinase Pepsin Catalase
3 The inhibitor having structural similarity with substrate is Irreversible inhibitor Reversible inhibitor Competitive inhibitor Noncompetitive inhibitor
4 ____can be checked by increasing substrate concentration Reversible inhibition Irreversible inhibition Noncompetitive inhibition Competitive inhibition
5
Optimum pH for digestive enzymes of stomach is

 Highly acidic Highly alkaline slightly acidic slightly alkaline
6 Change in temperature from 30o C to 40o C in human body will cause ____ in rate of reaction Increase Decrease First increase then decrease First increase then constant
7 If substrate concentration is unlimited, rate of enzyme action becomes Inversely proportional to enzyme concentration Directly proportional to enzyme concentration Directly proportional to substrate Concentration <div>Inversely proportional to substrate</div><div>Concentration</div>
8 At high substrate level, all the active sites of enzyme are Destroyed Available Degenerated Occupied
9 Optimum pH of all human enzymes is Variable Same Acidic Alkaline
10 Formation of ES complex activates the______ site of an enzyme Active Binding Catalytic Allosteric
11 An activated enzyme consisting of polypeptide and cofactor is called as Activator Apoenzyme Holoenzyme Coenzyme
12 Many enzymes are simply dissolved in the Nucleoplasm Stroma of chloroplast Cytoplasm Matrix of mitochondria
13 ______form the raw material for coenzyme Nucleic acid Lipids Vitamins Proteins
14 Which of the following acts as a bridge between enzyme and substrate? Activator Cofactor Prosthetic group Apo-enzyme
15 Nicotinamide adenine dinucleotide is an example of Cofactor Coenzyme Prosthetic group Nucleotide
16 The rate of enzyme action will be minimum at Optimum pH Optimum temperature Optimum conditions Maximum temperature
17 The competitive inhibitor competes with the Enzyme Cofactor Substrate Coenzyme
18 The enzyme that works best at intermediate pH is Pepsin Chymotrypsin Sucrase Pancreatic lipase
19 Following substances can act as inhibitors, except Cyanide Antimetabolites Antibodies Poisons
20 The optimum temperature for most of the enzymes in human body is 37 <sup>o</sup>C 35<sup> o</sup>C 37 <sup>o</sup>F 98.6<sup> o</sup>C
Download This Set
×