- Enzymes are
(a) Carbohydrates (b) RNA
(c) Proteins (d) Fats - The term Enzymes are coined by
(a) Pasteur (b) Buchner
(c) Urey Miller (d) Kuhne - Unit of enzyme is
(a) Microgram (b) Katal
(c) Mililitres (d) Kilogram - Fat is hydrolysed by the enzyme known as
(a) Tyrpsin (b) Lipase
(c) Pepsin (d) Amylase - The term ‘apoenzyme’ is applicable to
(a) Simple enzyme
(b) Protein part of conjugate enzyme
(c) Organic cofactor of conjugate enzyme
(d) Inorganic cofactor of conjugate enzyme - Zymogen is
(a) Enzyme poison
(b) Enzyme modulator
(c) Enzyme precursor
(d) Enzyme inhibitor - Allosteric enzymes possesses
(a) Active site and an allosteric site
(b) Active site and two types of allosteric sites
(c) Active site and three types of allosteric sites
(d) Three types of allosteric types
8. “Lock and key theory” theory of enzyme action
was proposed by
(a) Fischer (b) Koshland
(c) Kuhne (d) Arrhenius
9. Koshlands theory of enzyme action is known as
(a) Reduced fit theory
(b) Lock and key theory
(c) Induced fit theory
(d) Enzyme coenzyme theory
10. The enzymes involved in feed back inhibition are
called
(a) Allosteric enzymes (b) Holoenzymes
(c) Apoenzymes (d) Coenzymes
11. Which of the following statements is not true
regarding the active site of an enzyme?
(a) An active site is normally a hollow or cleft
on the surface of an enzyme.
(b) An active site is normally hydrophilic in
nature.
(c) Substrates fit into active sites and bind to
functional groups within the active site.
(d) An active site contains amino acids which
are important to the binding process and the
catalytic mechanism.
12. Which of the following statement best describes
an allosteric binding site?
(a) It is a binding site containing amino acids
with aliphatic side chains.
(b) It is a binding site that can accept a wide
variety of differently shaped molecules.
ff
(ff)
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