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Free download in PDF Enzymology Objective Type Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(21)
The degree of inhibition for non competitive inhibition of an enzyme catalyzed reaction?
[A]
Reaches a maxima with increase in substrate concentration and then decreases
[B]
Decreases with increase in substrate concentration
[C]
Increase with increase substrate concentration
[D]
Reaches with increase in substrate concentration
Answer: Reaches a maxima with increase in substrate concentration and then decreases
(22)
Which of the following reaction is catalyzed by Lyase?
[A]
Transfer of group from one molecule to another
[B]
Formation of bonds
[C]
Breaking of bonds
[D]
Intramolecular rearrangement of bonds
Answer: Breaking of bonds
(23)
Which of the following statement is/are correct about Enzyme:
[A]
Enzymes participate in cellular metabolic processes
[B]
Life would not exist without the presence of enzymes
[C]
An Enzyme is a protein and is used as a catalyst to accelerate the reaction
[D]
All the above
(24)
Which enzyme is used in making Baby Foods?
[A]
Trypsin
[B]
Rennin
[C]
Amylase
[D]
None of these
(25)
Name an enzyme that is derived from the stomachs of young ruminant animals and also used in dairy industry to produce cheese?
[A]
Liginase
[B]
Rennin
[C]
Trypsin
[D]
Pepsin
(26)
Who coined the word enzyme?
[A]
Wilhelm Kuhne
[B]
Rosalind Franklin
[C]
Alfred Russel
[D]
None of these
(27)
Which enzyme is used by the biscuit manufacturers to lower the protein level of flour?
[A]
Protease
[B]
Xylanase
[C]
Amylase
[D]
Cellulase
(28)
The ‘lock and key hypothesis’ mechanism is related with:
[A]
For enzyme specificity
[B]
Explosives
[C]
Digestion of fat in the body
[D]
For the formation of vacuole
Answer: For enzyme specificity
(29)
A __________is a biocatalyst that increases the rate of the reaction without being changed.
[A]
Enzyme
[B]
Hydrogen peroxide
[C]
Aluminum oxide
[D]
Silicon dioxide
(30)
Name the coenzyme of riboflavin (B2)?
[A]
FAD and FMN
[B]
Thiamine pyrophosphate
[C]
Coenzyme A
[D]
NAD or NADP
31
Name the enzyme secreted by pancreas?
a) Pepsin
b) Chymotrypsin
c)
d) Alcohol dehydrogenase
View Answer
Answer: c
[A]
Microbes
[B]
Trypsin
[C]
Plants
[D]
Insects
32
Name the enzyme which catalyzes the oxidation-reduction reaction?
[A]
Oxidoreductase
[B]
Phosphofructokinase
[C]
Transaminase
[D]
None of these
33
Ki indicates
[A]
Competition inhibition
[B]
Denaturation of enzyme
[C]
Reaction velocity
[D]
None of these
Answer: Competition inhibition
34
A competitive inhibitor will affect the enzyme activity:
[A]
irreversibly denaturing the enzymes
[B]
Decreasing Km value
[C]
precipitating the enzyme protein
[D]
None of these
Answer: irreversibly denaturing the enzymes
35
The enzyme:
[A]
decrease the energy of activation
[B]
increase the equilibrium constant
[C]
increases total energy of activation
[D]
increase total energy of the product
Answer: decrease the energy of activation
36
In enzyme kinetics, Vmax denotes
half the substrate concentration
substrate concnetration
quantity of enzyme substrate complex
[A]
Half of the enzyme molecules are bound to the substrate molecules and the other half are free
[B]
the amount of an active enzyme
[C]
The reaction is now at equibrillium
[D]
Maximum velocity is achieved
Answer: Half of the enzyme molecules are bound to the substrate molecules and the other half are free
37
Co enzymes are:
[A]
dialyzable, non ptotrien molecule
[B]
structural analongs of an ennyme
[C]
colloidal protein molecules
[D]
different forms of the same enzyme
Answer: dialyzable, non ptotrien molecule
38
Allosteric enzymes show all the following characteristics, except:
[A]
substrate binding site and regulatory site are different
[B]
sigmoid kinetics
[C]
binding between substrate and regulatory sites
[D]
cooperative binding of the substrate
Answer: binding between substrate and regulatory sites
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