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Enzymes 3

Total questions: 15

Worksheet time: 10mins

Name
Class
Date
1.

In recent years enzyme activity is measured in...

a)

Katal Units

b)

Kopal Units

c)

Kozac Units

2.

ES complex is formed when nature of substrate is ... to active site of enzyme.

a)

Complementary

b)

Opposite

c)

Inside

3.

Enzymes are sensitive to heat and pH

a)

True

b)

False

4.

Induced fit hypothesis is proposed by...

a)

Fischer

b)

Koshland

c)

Kuhn

5.

ES complex is... stable than either free enzymes or substrate.

a)

More

b)

Less

c)

Equally

d)

not

6.

The end product of enzymatic reaction:

a)

ES complex + enzyme

b)

Product + ES complex

c)

Enzyme + Substrate

d)

Product + Enzyme

7.

Rate of forward and backword reaction becomes equal at...condition

a)

Equilibrium

b)

Same

c)

Different

d)

High pH

8.

Identify the diagram.

a)

Induced fit hypothesis

b)

Lock & Key Hypothesis

c)

Activation energy reaction

d)

High pH enzyme reaction

9.

According to Koshland enzyme and substrate are strictly complementary to each other.

a)

True

b)

False

10.

At zero degree most of the enzymes are inactive.

a)

True

b)

False

11.
An enzyme speeds up a chemical reaction in the cell but can only be used once.  True or False? 
a)
true
b)
false
12.

Which cell organelles produce enzymes to break down cellular wastes?

a)

lysosomes

b)

peroxisomes

c)

Golgi apparatus

d)

vacuoles

13.
Which is NOT true?
a)
Enzymes speed up chemical reactions.
b)
Enzymes react best at a specific temperature.
c)
Enzymes only control ONE type of reaction.
d)
Enzymes are made of fatty acids.
14.
Which of these is most likely an enzyme?  
a)
Sucrose
b)
Galactose
c)
Fructose
d)
Amylase
15.
What factors affect an enzyme's reaction rate?
a)
temperature 
b)
pH
c)
substrate concentration
d)
all of these