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Free download in PDF Enzymology Multiple Choice 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./p>
(1)
Name an enzyme that digests fat?
[A]
Fructose
[B]
Sucrase
[C]
Lipase
[D]
Maltase
(2)
Name an enzyme which is not proteinaceous in nature?
[A]
Ribozyme
[B]
Peptidiase
[C]
Cellulases
[D]
Xylanases
(3)
Inactive enzymes which are not bound to their cofactors are called
[A]
Enzyme inhibitors
[B]
Coenzymes
[C]
Apoenzymes
[D]
None of these
(4)
What is the nature of an enzyme?
[A]
Protein
[B]
Carbohydrate
[C]
Vitamin
[D]
None of these
(5)
What is an apoenzyme?
[A]
It is a complete, biologically active conjugated enzyme
[B]
It is a prosthetic group
[C]
It is a protein portion of an enzyme
[D]
It is a non-protein group
Answer: It is a protein portion of an enzyme
(6)
Which of this vitamin is associated with the coenzyme Biocytin?
[A]
Biotin
[B]
Pyridoxine
[C]
Nicotinic acid
[D]
None of these
(7)
What is the function of phosphorylase?
[A]
Use H2O2 as the electron acceptor
[B]
Transfer amino group
[C]
Transfer inorganic phosphate
[D]
Transfer a carboxylate group
Answer: Transfer inorganic phosphate
(8)
Mark the CORRECT function of enzyme, Peptidase?
[A]
Cleave amino bonds
[B]
Removal of H2O
[C]
Cleave phosphodiester bond
[D]
Remove phosphate from a substrate
Answer: Cleave amino bonds
(9)
Which one of the following reactions used for the purpose of recycling enzymes in bioprocesses
[A]
Immbolization
[B]
Polymerization
[C]
Isomerization
[D]
Phosphorylation
(10)
Which one of the following techniques is not ideal for immobilized cell free enzymes?
[A]
physical bonding by flocculation
[B]
covalent surface bonding to surface carriers
[C]
physical entrapment by encapsulation
[D]
covalent chemical bonding by cross linking the precipitate
Answer: physical bonding by flocculation
(11)
Most industrial enzymes are obtained from
[A]
Microbes
[B]
Animal Tissues
[C]
Plants
[D]
Insects
(12)
Enzymes, vitamins and hormones can be classified into a single category of biological chemicals because all of them
[A]
Are proteins
[B]
Enhance the oxidation metabolism
[C]
Aid in regulating metabolism
[D]
None of these
(13)
Digestive enzymes belong to the class:
[A]
Hydrolases
[B]
oxidoreductases
[C]
Lysases
[D]
None of these
(14)
Enzymes synthesized in inactive form are called:
[A]
proenzymes
[B]
coenzymes
[C]
Apoenzymes
[D]
None of these
(15)
In competitive inhibition:
[A]
Km is decreased and Vmax is increased
[B]
Km is increased and Vmax is increased
[C]
Km is decreased and Vmax is normal
[D]
Km is increased and Vmax is normal
Answer: Km is increased and Vmax is normal
(16)
When substrate concentration is equal to Km value:
[A]
Half of the enzyme molecules are bound to the substrate molecules and the other half are free
[B]
maximum enzyme moleules are taking part in the reaction
[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
(17)
The KM value of an enzyme is:
[A]
The substrate concentration at half maximal velocity
[B]
Dissociation constant of enzyme substrate complex
[C]
the total enzyme concentration
[D]
half the substrate concentration at maximal velocity
Answer: The substrate concentration at half maximal velocity
(18)
De novo synthesis of an enzyme, promoted by the substrate on which it acts, is characterised by the term
[A]
Activation
[B]
Gratuity
[C]
Induction
[D]
Derepression
(19)
The phenomenon by which the synthesis of a set of enzyme leading to a product from outside is known as
[A]
Depression
[B]
Repression
[C]
Suppression
[D]
None Of These
(20)
Enzyme papain is used with success to
[A]
Tenderize meat
[B]
Leaven bread
[C]
Increase meat production
[D]
Ripen papaya fruit
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