wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

The Chemistry of Life

Total questions: 59

Worksheet time: 43mins

Name
Class
Date
1.
Zane is making a chart of compounds that are found in the human body. What is the most common compound found in the human body?
a)
H2O   
b)
CO2
c)
Sodium Bicarbonate (baking soda)
d)
NaCl (table Salt)
2.
Carbohydrates are made up of three of the six major molecules found in living things. The general chemical formula for a carbohydrate is CH2O. Which elements combine to make a carbohydrate?
a)
copper and cobalt
b)
chlorine and oxygen
c)
carbon, helium, and oxygen
d)
carbon, hydrogen, and oxygen
3.
When people eat foods high in proteins, such as meat, eggs and cheese, the body breaks down the proteins into smaller molecules. What is supplied to cells when the body breaks down proteins?
a)
amino acids
b)
nucleic acids
c)
phospholipids
d)
carbohydrates
4.
What are the four main types of molecules found in the cells of living things?
a)
carbohydrates, lipids, nucleic acids, and proteins
b)
lipids, nutrients, nucleic acids, and carbon dioxide
c)
carbon dioxide, hydrogen, oxygen, and various salts
d)
atoms, molecules, chemical compounds, and carbohydrates
5.
What type of molecule provides immediate energy in cells?  
a)
lipids
b)
proteins
c)
carbohydrates
d)
nucleic acids
6.
Animal cells have four main molecules that keep the body healthy. What type of molecule in animal cells provides a “map” for making proteins?
a)
lipids 
b)
proteins
c)
nucleic acids
d)
carbohydrates
7.
The cells in living things contain four main molecules that allow the cells to function. Which of these molecules cannot mix with water?
a)
lipids
b)
proteins
c)
nucleic acids
d)
carbohydrates
8.
This biomolecule is used to make energy for our cells. The simplest is glucose, a monosaccharide.
a)
Carbohydrates
b)
Lipids
c)
Nucleic Acids
d)
Proteins
9.
These biomolecules are fats, oils, waxes and steroids. They are also a result if we eat too many carbohydrates and why we don't melt in water.
a)
Carbohydrates
b)
Lipids
c)
Nucleic Acids
d)
Enzymes
10.
Examples of these biomolecules are DNA and RNA...
a)
Nucleic Acids
b)
Carbohydrates
c)
Lipids
d)
Proteins
11.
Nucleic Acids are made up of smaller subunits called....
a)
Nucleotides
b)
Lipids
c)
Monosaccharides
d)
Subunits
12.
These biomolecules are the main building blocks of you. They are large and complex and special ones do jobs all over your body as catalysts.
a)
Proteins
b)
Carbohydrates
c)
Lipids
d)
Nucleic Acids
13.
Proteins are made up of two things...
a)
Amino Acids and Peptide Bonds
b)
Amino Acids and Covalent Bonds
c)
Amino Acids and Hydrogen Bonds
d)
Amino Acids and Ionic Bonds
14.
What are special types of proteins that act as catalysts?
a)
Enzymes
b)
Lipids
c)
Polysaccharides
d)
DNA
15.
Are enzymes substrate specific?
a)
YES!
b)
No...
16.
Enzymes can either...
a)
break things down or put things togeter
b)
break things down only
c)
put things together only
d)
make cheese
17.
Where an enzyme joins with a substrate is called its...
a)
Active Site
b)
Mouth
c)
Substrate
d)
pH
18.
Enzymes make chemical reactions go faster by doing what?
a)
Lowering the activation energy of a reaction
b)
Making energy
c)
Absorbing energy
d)
Having a dance off with other enzymes
19.

Water has these two physical properties that allow it to interact with other substances.

a)

Cohesion

b)

Adhesion

c)

Non-polar

d)

Ionically charged

20.

Water's ability to dissolve many substances arises from:

a)

Water molecules being polar

b)

Water molecules being non-polar

c)

Water's high heat capacity

d)

Water being hydrophobic in nature

21.

Enzymes function to speed up chemical reactions by

a)

Lowering the activation energy

b)

Adding energy to the substrate molecules

c)

Changing the products into reactants

d)

Making reactants more polar and hydrophobic

22.

The location on an enzyme where substrate molecules bind is referred to as:

a)

The active site

b)

The monomeric colluder

c)

The resonator

d)

The synaptic cleft

23.

____, H, O, N make up 96% of living matter.

a)

F

b)

Na

c)

P

d)

C

24.

Water molecules are

a)

polar

b)

nonpolar

c)

positively charged

d)

negatively charged

25.

_____________________ make up cell membranes and the so-called bilayer.

a)

Deoxyribonucleic acids

b)

Polysaccharides

c)

Triglycerides

d)

Phospholipids

26.

A protein is _____________ when it loses its shape and ability to function because of hear, a change in pH or some other disturbance.

a)

dehydrated

b)

neutralized

c)

denatured

d)

hydrolyzed

27.

The two types of fatty acids are _______________ and _________________.

a)

trans-saturated

b)

saturated

c)

unsaturated

d)

cis-saturated

28.
Substances that dissociate in water and release hydrogen ions (H+)
a)
bases
b)
acids
c)
compounds
d)
ions
29.
Used to indicate acidity or alkalinity of a substance. Ranges from 0-14. Each unit has a 10 times difference in acidity or alkalinity
a)
acid scale
b)
base scale
c)
pH scale
d)
ion scale
30.
Which is NOT one of the four elements that make up over 90% of the human body
a)
Carbon
b)
Nitrogen
c)
Chlorine 
d)
Oxygen
31.
Attractions between molecules of the same substance
a)
adhesion
b)
cohesion
c)
mixture
d)
acid
32.
Substances formed by a chemical reaction
a)
products
b)
reactants
c)
coefficients
d)
solution
33.
Plants store glucose in the form of
a)
starch
b)
glycogen
c)
cellulose
d)
chitin
34.
What is structure A?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
35.
What is structure D?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
36.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
37.
The attraction that causes water and other liquids to form drops on thin films is called ________________. This is also water’s ability to be attraction to other water molecules.
a)
adhesion
b)
capillary action
c)
cohesion
d)
surface tension
38.
What property of water helps to moderate earth's temperature?
a)
adhesion
b)
chohesion
c)
Specific heat capacity
d)
Latent heat of vaporization
39.

What gives water so many important properties for life?

a)

adhesion and cohesion

b)

the amount of carbon in each molecule

c)

energy released exothermically

d)

hydrogen bonds give it polarity

40.

Which of the following solutions has the highest Hydrogen ion concentration?

a)

a solution with a pH of 1

b)

a solution with a pH of 4

c)

a solution with a pH of 7

d)

a solution with a pH of 10

41.

A catalyzed reaction

a)

increases the products made

b)

uses less activation energy to get started

c)

has a slower reaction rate

d)

uses more reactants throughout the reaction

42.

Activation energy

a)

is the term for the amount of energy in each reactant

b)

helps the enzyme to increase the rate of the reaction

c)

is the term for the amount of energy that needs to be added for a chemical reaction to start

d)

is the term for the amount of energy released by the reaction after it starts

43.

Changes in the pH, temperature, enzyme concentration, and/or substrate concentration can negatively affect

a)

the activation energy of chemical reactions

b)

the bond energy released by reactants in a reaction

c)

the efficient function of an enzyme or catalyzed reaction

d)

the polarity of water used for evaporative cooling

44.
What is the main function of nucleic acids?
a)
To function in insulation.
b)
To store and transmit hereditary information.
c)
To provide energy
45.
What is the strongest base listed in this figure?
a)
Hydrochloric acid
b)
Pure water
c)
Sodium hydroxide
d)
Sea water
46.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
47.
molecule in which opposite ends have opposite electric charges
a)
cohesion
b)
polar molecule
c)
hydrogen bond
d)
solution
48.
Why does ice float?
a)
As water freezes, it expands and its density decreases.
b)
As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.
c)
As water freezes, air becomes trapped between the hydrogen bonds of water molecules.
d)
As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.
49.
Water striders can walk across the surface of calm water. Their feet push the surface of the water down slightly, but they do not break the surface. Why?
a)
The insects are light enough so they do not break the hydrogen bonds holding the water molecules together
b)
The insects actually use their wings to hover slightly above the water’s surface and they only skim it with their feet.
c)
The insect’s feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water’s surface.
d)
The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next
50.
A glass of Kool Aid/ Tang juice can be classified as
a)
element
b)
homogeneous
c)
heterogeneous
d)
suspension
51.
Soup is a Heterogeneous Mixtures?  
a)
TRUE
b)
FALSE
52.
A solution consists of two parts. One part is the substance that is dissolved. What is the name of this part of a solution?
a)
solute
b)
solvent
c)
dissolution
d)
mixture
53.
The other component of a solution is the part that does the dissolving. What is the name of this component?
a)
solvent
b)
dissolution
c)
element
d)
mixture
54.
Type of mixture that has the SAME COMPOSITION in every part.
a)
Homogenous
b)
Heterogeneous
55.
Type of mixture that DOESN'T HAVE the same composition in every part.
a)
Homogeneous
b)
Heterogeneous
56.
Chocolate milk is an example of a
a)
homogeneous mixture
b)
heterogeneous mixture
57.
Salad is an example of a
a)
homogeneous mixture
b)
heterogeneous mixture
58.
Soil is an example of a
a)
homogeneous mixture
b)
heterogeneous mixture
59.
Lemonade is an example of a
a)
homogeneous mixture
b)
heterogeneous mixture

Similar Resources on Wayground

Calday Inheritance & Variation Year 8

64 questions

Calday Inheritance & Variation Year 8

quiz

Worksheet

•

7th - 11th Grade

All About Plates 2

62 questions

All About Plates 2

quiz

Worksheet

•

10th Grade

Unit 3 - Chemistry Revision

62 questions

Unit 3 - Chemistry Revision

quiz

Worksheet

•

8th - 10th Grade

Basic Concept (Units – II, IV & V)

60 questions

Basic Concept (Units – II, IV & V)

quiz

Worksheet

•

11th Grade - University

Q2 REVIEWER

55 questions

Q2 REVIEWER

quiz

Worksheet

•

9th - 12th Grade

Endocrine and Immune Review Questions

61 questions

Endocrine and Immune Review Questions

quiz

Worksheet

•

12th Grade

Plant and Animal Cells

60 questions

Plant and Animal Cells

quiz

Worksheet

•

5th - 10th Grade

REVISION FORM 4 KBSM PART 3

60 questions

REVISION FORM 4 KBSM PART 3

quiz

Worksheet

•

9th - 10th Grade