In enzymes, the reaction takes place in a small part of the enzyme called………
a) active site
b) passive site
c) framework
d) processing unit
Explanation: while the rest of the enzyme is acts as framework
Active site consists of …….
a) catalytic site
b) binding site
c) both a and b
d) none of them
How Do Enzymes Work?
How many hypotheses explain the mode of enzyme action?
a) two
b) three
c) four
d) many
Explanation: 1. Lock and key hypothesis and 2. Induced fit hypothesis
Who proposed the “lock and key hypothesis” about enzyme action?
a) Watson
b) Wilkins
c) Fischer
d) Koshland
Explanation: Like a lock can be
open by its key only, a substance possessing specific composition only can
combine with the specific active site found in the specific enzyme's surface.
According to the
lock and key hypothesis, the substrate is imagined like a…….while the enzyme is
a………
a) lock – key
b) key – lock
c) both a and b
d) none of them
Explanation: the active site is regarded as rigid structure that does not modify
