WorksheetsCh 2 - The Chemistry of Life
Total questions: 15
Worksheet time: 8mins
Name
Class
Date
1.
All matter is composed of:
a)
atoms
b)
cells
c)
carbon
d)
hydrogen
2.
The periodic table displays ____, arranged by their atomic number.
a)
molecules
b)
protons
c)
elements
d)
neutrons
3.
H2O is an example of a(n):
a)
element
b)
subatomic particle
c)
atom
d)
compound
4.
Which particles are found within the nucleus of an atom?
a)
protons and electrons
b)
protons and neutrons
c)
electrons and neutrons
d)
protons, electrons, and neutrons
5.
What is responsible for the “stickiness” of water that results in cohesion and adhesion?
a)
covalent bonds
b)
ionic bonds
c)
hydrogen bonds
d)
van der Waals forces
6.
Which property of water explains why ice floats?
a)
hydrogen bonds
b)
van der Waals forces
c)
adhesion
d)
solvent property
7.
A water strider can move across the surface of water due to what property of water?
a)
adhesion
b)
cohesion
c)
polarity
d)
heat capacity
8.
Most enzymes found in the body work best at about 40 degrees. This represents the enzyme’s:
a)
base rate
b)
substrate
c)
optimal pH
d)
optimal temperature
9.
Substances that speed up chemical reactions in the body are called:
a)
substrates
b)
enzymes
c)
carbohydrates
d)
ions
10.
Which macromolecule is made from repeating units of sugar, like glucose?
a)
lipids
b)
carbohydrates
c)
proteins
d)
nucleic acids
11.
DNA is what type of macromolecule?
a)
lipid
b)
carbohydrate
c)
protein
d)
nucleic acid
12.
Oils and fats are what type of macromolecule?
a)
lipid
b)
carbohydrate
c)
protein
d)
nucleic acid
13.
The letter A in the diagram below represents the:
a)
enzyme
b)
substrate
c)
compound
d)
element
14.
The letter B in the diagram below represents the:
a)
enzyme
b)
substrate
c)
compound
d)
element
15.
What is the optimal pH of lipase? ?
a)
4
b)
8
c)
9
d)
10
100 %
