WorksheetsLiving Environment Enzymes
Total questions: 26
Worksheet time: 2hrs 10mins
Name
Class
Date
1.
Based on their role in the cell, enzymes can also be classified as –
a)
inhibitors
b)
organic (biological) catalysts
c)
hormones
d)
vitamins & minerals
2.
What is the primary role of enzymes inside of living cells?
a)
organizing the translation of proteins
b)
allowing cells to be motile
c)
absorbing ultraviolet rays
d)
speeding up chemical reactions
3.
Enzymes are a form of which biomolecule?
a)
carbohydrates
b)
proteins
c)
nucleic acids
d)
lipids
4.
Some bacteria contain a substance called nitrogenase. Nitrogenase catalyzes the chemical reaction that converts atmospheric nitrogen (N2) into ammonia (NH3). Nitrogenase is an example of which of the following?
a)
a sugar
b)
a nucleotide
c)
an enzyme
d)
an amino acid
5.
Enzymes are composed of which of the following building blocks?
a)
amino acids
b)
acyl groups
c)
nucleotides
d)
monosaccharides
6.
Enzymes are proteins that help increase the rate of chemical reactions inside cells. These proteins are composed of many simpler molecules called amino acids. Which of the following suggests that the shape of an enzyme determines the enzyme’s function?
a)
Enzymes are specific to a substrate.
b)
Enzymes can operate in a wide range of conditions.
c)
Enzymes are activated by neighboring molecules.
d)
Enzymes can be found in all life-forms.
7.
a)
Structure B is a substrate
b)
Structure C is a substrate
c)
Structures at E are substrates
d)
Structure B is an enzyme
8.
a)
Structure B is an enzyme
b)
Structure C is an enzyme
c)
Structures at E are substrates
d)
Structure C is a product
9.
a)
location A is a product
b)
Location A is the active site
c)
Location A can bind with any substrate, no matter the shape or size
10.
a)
Structure B is the product
b)
Structure C is a product
c)
Structure D is the product
d)
Structure E is a product
11.
a)
Changing temperature will affect structure B.
b)
Changing temperature will affect structure C.
c)
Changing temperature will not affect any structure
12.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
13.
a)
The optimum pH of the enzyme is 6.6.
b)
The optimum pH of the enzyme is 5.8
c)
The enzyme’s activity increases as pH increases 5.0 to 9.0
d)
The enzyme’s activity is greater around pH of 8.0 .
14.
Which chemical is classified as an enzyme?
a)
Galactose
b)
Lipid
c)
Protease
d)
Manganese dioxide
15.
Any substance that is acted upon by an enzyme is called a(n)?
a)
Coenzyme
b)
Substrate
c)
Vitamin
d)
Polypeptide
16.
Which substrate would this enzyme catalyze?
a)
Δ
b)
σ
c)
∅
d)
μ
17.
What makes an enzyme substrate specific?
a)
Size
b)
Shape
c)
Name
d)
Location it is found in
18.
What factors affect an enzyme's reaction rate?
a)
temperature & pH
b)
carbohydrate building blocks & pH
c)
amount of amino acids & temperature
d)
amount of light & temperature
19.
Which of these is an enzyme?
a)
Sucrose
b)
Saccharide
c)
Fructose
d)
Amylase
20.
Enzymes need certain environmental conditions in order to function properly. What happens when enzymes are heated to a high temperature?
a)
they die
b)
they denature
c)
they change their amino acid sequence
d)
they work better
21.
What is the name for the mechanism of enzyme activity?
a)
Lock and key
b)
jigsaw puzzle
c)
hammer and nail
d)
two hands pattern
22.
Where do substrates bind on an enzyme?
a)
voltage-gated channels
b)
surface receptor
c)
calcium channels
d)
active site
23.
If pH or temperature changes, then the rate of function will change for
a)
an enzyme
b)
a substrate
c)
the products
24.
Enzyme help to digest proteins into
a)
simple sugars
b)
fatty acids
c)
amino acids
d)
starches
25.
Enzyme help to digest starch into
a)
simple sugars
b)
fatty acids
c)
amino acids
d)
lipids
26.
What pH range would classify something as acidic?
a)
below 7
b)
7
c)
above 7
100 %
