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Chemistry of Life Unit Review

Total questions: 115

Worksheet time: 29hrs 45mins

Name
Class
Date
1.
What are the four elements that all life is made up of?
a)
Hydrogen, Oxygen, Nitrogen and Carbon
b)
Helium, Oxygen, Neon and Carbon
c)
Hydrogen, Titanium, Carbon, Nitrogen
d)
Oxygen, Chlorine, Iron, Nitrogen
2.
What is the strongest of all the bonding types?
a)
Covalent
b)
Ionic
c)
Hydrogen
d)
Metallic
3.
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
4.
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
5.
Examples of these biomolecules are DNA and RNA...
a)
Nucleic Acids
b)
Carbohydrates
c)
Lipids
d)
Proteins
6.
Nucleic Acids are made up of smaller subunits called....
a)
Nucleotides
b)
Lipids
c)
Monosaccharides
d)
Subunits
7.
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
8.
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
9.
How many Amino Acids does our body use to make proteins?
a)
20
b)
10
c)
6
d)
2
10.
What are special types of proteins that act as catalysts?
a)
Enzymes
b)
Lipids
c)
Polysaccharides
d)
DNA
11.
Are enzymes substrate specific?
a)
YES!
b)
No...
12.
Enzymes can either...
a)
break things down or put things togeter
b)
break things down only
c)
put things together only
d)
make cheese
13.
Where an enzyme joins with a substrate is called its...
a)
Active Site
b)
Mouth
c)
Substrate
d)
pH
14.
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
15.
Who am I? I'm a polymer composed of amino acids that are linked by peptide bonds. Amino acid bonds determine my folds. 
a)
Lipid
b)
Carbohydrate
c)
Protein
d)
Sugar
16.

Enzymes act on

a)

products

b)

proteins

c)

amino acids

d)

substrates

17.

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

18.

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

19.

What are the 4 types of carbon-based molecules in organisms?

a)

carbohydrates, lipids, fatty acids, and monomers

b)

polymers, monomers, acids, bases

c)

adhesion, cohesion, evaporative cooling, and high specific heat

d)

nucleic acids, proteins, lipids, and carbohydrates

20.

What are proteins made of?

a)

amino acids

b)

monosaccharides

c)

nucleic acids

d)

fatty acids

21.

Which carbon-based molecule includes sugar and starches?

a)

carbohydrates

b)

lipids

c)

proteins

d)

nucleic acids

22.

What is the primary function of DNA?

a)

to make nucleic acids

b)

long term energy storage

c)

store genetic information

d)

to function as RNA

23.
Plants store glucose in the form of
a)
starch
b)
glycogen
c)
cellulose
d)
chitin
24.
Which type of carbohydrate is this?
a)
monosaccharide
b)
disaccharide
c)
polysaccharide
d)
glyceride
25.
This group functions in structure, the immune system, and giving uniqueness to organisms.
a)
Carbohydrates
b)
Proteins
c)
Lipids
d)
Nucleic Acids
26.
What is the function of nucleic acids?
a)
store genetic information
b)
store energy (long-term)
c)
store energy (short-term)
d)
build skin, hair, nails, muscles
27.
Which is an example of a carbohyrdate?
a)
wax
b)
bread
c)
DNA
d)
red meat
28.

Which statement is true?

a)

Simple sugars are made of polysaccharides.

b)

Glycerol is made of fatty acids.

c)

RNA molecules are made of nucleotides.

d)

Amino acids are made of proteins.

29.
DNA and RNA are examples of...
a)
proteins
b)
nucleic acids
c)
carbohydrates
d)
lipids
30.
Phospholipids are used in what biological structure?
a)
RNA
b)
DNA
c)
Cell membrane
d)
Cell wall
31.

What do nucleic acids and phospholipids have in common?

a)

Both contain phosphate groups

b)

Both important for cell structure

c)

both are important energy sources

d)

both important cell signaling molecules

32.

ATP transports energy

a)

from nucleic acids to enzymes

b)

from exergonic reaction to endergonic reactions

c)

from the nucleus to the cell

d)

from endergonic reactions to exergonic reactions

33.

Which of the following statements is a reason to classify a compound as inorganic?

a)

the compound is a flammable gass

b)

the compound is not produced or consumed by living things

c)

the compound is able to dissolve from liquid to a solid

d)

the compound only contains hydrogen and oxygen

34.

Lipids and Carbohydrates differ in which of the following fundamental respects?

a)

Lipids are hydrophobic and carbohydrates are hydrophilic

b)

Lipids are inorganic an carbohydrates are organic

c)

lipids store energy and carbohydrates store information

d)

lipids are structurally important and carbohydrates are not

35.

What is the significance of the bond that forms to convert ADP to ATP?

a)

bond is particularly strong and difficult to break

b)

bond is very easy to form and releases energy when formed

c)

bond is high energy bond

d)

bond binds an inorganic molecule to an organic molecule

36.

This is the smallest unit of an element.

a)

atom

b)

molecule

c)

compound

d)

nucleus

37.

This is any combination of two or more atoms from different elements that are chemically combined.

a)

compound

b)

molecule

c)

element

d)

pure substance

38.

Any combination of two or more atoms that are chemically combined is called this.

a)

molecule

b)

compound

c)

element

d)

pure substance

39.

The basic building blocks of the universe. The smallest and most pure substances that can be found.

a)

elements

b)

atoms

c)

molecules

d)

compounds

40.

This is what holds atoms in a molecule and compound together. They can be ionic, covalent, or metallic (and you'll learn about these in high school chemistry).

a)

chemical bond

b)

chemical formula

c)

chemical symbol

d)

electron cloud

41.

These are what determine the properties of every atom and make one element different from another. They have a positive charge (yes, I'm positive that it's a positive charge).

a)

protons

b)

electrons

c)

neutrons

d)

nucleus

42.

These hang out in the nucleus and don't really affect the properties of the atom that much. They don't have any charge (so they can't use credit cards).

a)

neutrons

b)

protons

c)

electrons

d)

atomic numbers

43.

These are what form chemical bonds as atoms share or take them from one another. They orbit the nucleus and have a negative charge (but they are still happy about things in general).

a)

electrons

b)

electron clouds

c)

protons

d)

neutrons

44.

This is the central region of an atom and where protons and neutrons hang out (but the protons and neutrons still follow proper social distancing rules!).

a)

nucleus

b)

electron cloud

c)

The Periodic Table of Elements

d)

atomic number

45.

This is a list of the 118 known elements that exist (and a picture of it is on this quiz!).

a)

The Periodic Table of Elements

b)

The Student Faculty Handbook

c)

Facebook

d)

Wikipedia

46.

This is anything that has mass and takes up space (meaning it has a volume).

a)

matter

b)

mass

c)

element

d)

energy

47.

This tells you how many protons are in each atom of a specific element and how many electrons there are in each unreacted atom from that element.

a)

atomic number

b)

atomic mass

c)

chemical formula

d)

chemical symbol

48.

On the Periodic Table of Elements, this is the number below the chemical symbol and tells you how much mass is in a certain number of atoms for that element (you'll need to use this a LOT in high school chemistry).

a)

atomic mass

b)

atomic number

c)

chemical symbol

d)

mass

49.

This is where electrons hang out--it goes around the nucleus of an atom.

a)

electron cloud

b)

Apple Icloud

c)

cumulus

d)

stratus

50.

When a covalent bond forms _______________ are shared.

a)

protons

b)

nutrons

c)

valence electrons

d)

quarks

51.

Compounds have _________________ properties, compared to the elements that form them.

a)

similar

b)

different

52.

How many valence electrons does Oxygen (O) have?

a)

6

b)

8

c)

15

d)

16

53.

How many atoms of hydrogen are in a sugar molecule with the formula C6H12O6

a)

12

b)

6

c)

24

d)

18

54.

Atoms that are _____________ will form bonds.

a)

stable

b)

unstable

55.

Polar molecules form due to ___________ sharing of valence electrons.

a)

equal

b)

unequal

c)

greater

d)

group

56.

Valence electrons are located _____________ the nucleus of an atom

a)

close to

b)

farthest from

c)

randomly around

57.

Why do all bonds form?

a)

so the number of protons equals the number of electrons

b)

so an atom can become unstable

c)

to fill the outermost energy level

58.
What do we call a covalent bond where electrons are shared UNEVENLY or UNEQUALLY?
a)
Ionic
b)
Polar Covalent
c)
Nonpolar Covalent
d)
Van der Waals Force
59.

When an atom loses an electron, it becomes a

a)

positive ion

b)

negative ion

c)

neutral ion

d)

neutral atom

60.

An ionic bond is the attraction between

a)

similarly charged ions

b)

oppositely charged ions

c)

neutral ions

d)

neutral atoms

61.

A chemical bond formed when two atoms share electrons is called a(n)

a)

ionic bond

b)

covalent bond

c)

polyatomic bond

d)

crystal bond

62.

What is the greatest number of valence electrons an atom can have?

a)

2

b)

3

c)

8

d)

12

63.

Which group of elements is the most stable?

a)

metals

b)

metalloids

c)

nonmetals

d)

noble gases

64.

How many naturally occurring elements are there?

a)

71

b)

92

c)

103

d)

118

65.

A substance that is made of only one kind of atom is a(n)__________________.

a)

element

b)

nucleus

c)

valence electron

d)

compound

66.
The number of atoms you begin with in a chemical reaction ...
a)
must be the same as the number of  atoms you end with
b)
must be an even number
c)
can be different to the number you finish with
d)
changes depending on how much energy is formed
67.

Balance the following:

____ Fe + ____ Cl2 → ____ FeCl3

a)
1,1,2
b)
1,3,1
c)
2,2,3
d)
2,3,2
68.

Balancing the following:

____ Al + ____ HCl → ____ AlCl3 + ____ H2

a)
1,3,1,2
b)
2,3,2,3
c)
2,6,2,3
d)
3,2,6,2
69.

Which type of reaction is:

2 NaBr + Ca(OH)2 → CaBr2 + 2 NaOH

a)
Synthesis
b)
Single Displacement
c)
Double Displacement
d)
Combustion
70.
Which type of reaction is: C2H4 + 3 O2 → 2 CO2 + 2 H2O
a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Combustion
71.

Which type of reaction is:

2 H3AsO4 → As2O5 + 3 H2O

a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Combustion
72.

Which type of reaction is:

2 NH3 + H2SO4 → (NH4)2SO4

a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Double Displacement
73.

Which type of reaction is:

3 Pb + 2 H3PO4 → 3 H2 + Pb3(PO4)2

a)
Synthesis
b)
Single Displacement
c)
Double Displacement
d)
Combustion
74.

Which type of reaction is:

4 (NH4)3PO4 + 3 Pb(NO3)4 → 12 NH4NO3 + Pb3(PO4)4

a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Double Displacement
75.
The Law of Conservation of Matter states that the total mass of the reactants should be 
a)
More than the mass of the products
b)
Equal to the mass of the products
c)
Ignored during the reaction
d)
Less than the mass of the products
76.
When balancing equations, the rule is that you can only add, change, and remove
a)
Coefficients
b)
Mass
c)
Subscripts
d)
Elements 
77.

Balance this reaction:

____ Na3PO4 + ____ KOH ---> ____ NaOH + ____ K3PO4

a)

1,3,3,1

b)

1,3,2,1

c)

2,3,3,1

d)

1,1,3,1

78.

Balancing this reaction:

____ CH4 + ____ O2 ---> ___ CO2 + ____ H2O

a)

2,1,3,1

b)

1,2,1,2

c)

1,2,2,1

d)

2,1,1,2

79.

Balance this reaction:

____ NaF + ____ Br2 ---> ___ NaBr + ____ F2

a)

3,1,2,1

b)

1,2,3,4

c)

2,1,2,1

d)

1,2,1,2

80.

Balance this reaction:

____ RbNO3 + ____ BeF2 ----> ____ Be(NO3)2 + ____ RbF

a)

1,1,1,1

b)

1,2,1,1

c)

2,1,1,2

d)

2,1,2,1

81.

What do the coefficients need to be in the following equation in order to be balanced?

_Al +_HCl → _H2 +_AlCl3

a)

2, 6, 3, 2

b)

it is already balanced

c)

4, 12, 3, 4

d)

2, 1, 4, 5

82.
__H2O2 --> __H2O + __O2
a)
already balanced
b)
2,1,1
c)
2,2,1
d)
2,1,2
83.
__NaClO3 --> __NaCl + __O2
a)
2,2,2
b)
2,2,3
c)
3,2,2
d)
1,2,3
84.
Balance this reaction: ____ RbNO3 + ____ BeF2 ----> ____ Be(NO3)2 + ____ RbF
a)
1,1,1,1
b)
1,2,1,1
c)
2,1,1,2
d)
2,1,2,1
85.

What mathematical function do coefficients perform in a balanced equation?

a)

addition

b)

multiplication

c)

subtraction

d)

division

86.
The chemical compound of water is
a)
HO
b)
H2O
c)
H3O
d)
HO2
87.
Water is a universal solvent
a)
True
b)
False
88.
A Compound that is being dissolved is called a
a)
Solution
b)
Solute
c)
Solvent
d)
Suspension
89.
A solvent is...
a)
substance into which the solute dissolves
b)
a compound being dissolved
c)
a substance that does not dissolve
d)
None of the above
90.
What is water made of?
a)
Water
b)
Liquid
c)
Hydrogen and oxygen
d)
Blue 
91.
A water strider can skate along the top of a pond because:
a)
covalent bonds result in water cohesion
b)
hydrogen bonds result in water cohesion (surface tension)
c)
water striders have adapted to take advantage of water cohesion
d)
low surface tension of water
92.
Why can water have no net charge but have slight charges in different parts of the molecule?
a)
The oxygen end is slightly negative and the hydrogen end is slightly positive
b)
The hydrogen end is slightly negative and the oxygen end is slightly positive
c)
The hydrogen and oxygen ends change in polarity
d)
Because it is hydrophobic
93.
Attractions between water molecules are called
a)
Covalent bonds
b)
Ionic bonds
c)
Polar bonds
d)
Hydrogen bonds
94.
Which end of the water molecule has a slightly positive charge?
a)
the oxygen end
b)
the hydrogen end
c)
both ends are slightly positive
d)
neither end is positive
95.
Attractions between molecules of the same substance
a)
adhesion
b)
cohesion
c)
mixture
d)
acid
96.

Water stores heat effectively which helps us to maintain homeostasis. Which property of water is responsible for this?

a)

Specific heat capacity

b)

Cohesion

c)

Adhesion

d)

Capillary Action

97.

The physical property of water, resulting from hydrogen bonding, that allows water molecules to stick to each other is referred to as:

a)

Cohesion

b)

Adhesion

c)

Homeostasis

d)

Capillary Action

98.

The physical property of water that allows it to stick to ther polar substances is referred to as:

a)

Cohesion

b)

Adhesion

c)

Van der Waals Forces

d)

Ionic bonding

99.

Capillary action, which allows for the movement of water within plants, is the result of these two properties of water

a)

Cohesion

b)

Specific heat capacity

c)

Adhesion

d)

Pragmatic attraction

100.

The ability of water to dissolve many substances is a result of water molecules being ______________.

a)

Polar

b)

Non-polar

c)

Unstable

d)

Radioactive

101.

Pure (distilled) water has a pH value of:

a)

1

b)

7

c)

>9

d)

14

102.
What part of the water cycle does this picture show?
a)
condensation
b)
precipitation
c)
evaporation
103.
Which of these is an example of precipitation?
a)
snow
b)
air
c)
clouds
d)
vapor
104.
What is it called when plants give off water vapor as a waste product?
a)
condensation
b)
evaporation
c)
sublimation
d)
transpiration
105.
What is the water cycle?
a)
the 3 forms of water
b)
the movement of water on, above, or below the surface of the Earth
c)
when water melts
d)
when clouds form
106.
Precipitation occurs because 
a)
the droplets evaporate in the air
b)
the droplets are too light for the air to hold
c)
the droplets are too heavy for the air to hold
107.
The ________ is the driving force of the earth's surface.
a)
sun
b)
moon 
c)
stars
108.

The fact that a glass can be filled above the rim with water is due to water's _________?

a)

Surface Tension

b)

ability to dissolve a great variety of substances

c)

greater density as a liquid than solid

d)

adhesive properties

109.

Which of the following would a hydroxide ion most likely be attracted to?

a)

C6H12O6

b)

H2O

c)

OH-

d)

K+

110.

Water is found in which of the following states at Earth's surface?

a)

liquid and solid

b)

liquid, solid, and gas

c)

gas and liquid

d)

only liquid

111.

Why is a water molecule polar?

a)

It has an unequal number of electrons and protons

b)

The oxygen atom attracts electrons more strongly than the hydrogen atom does

c)

The hydrogen atom attracts electrons more strongly than the oxygen atom does

d)

The molecule spins around an imaginary pole, similar to a planet.

112.

Frozen pieces of pure water are placed into a liquid. The ice sinks. What can you conclude?

a)

The ice did not have any air bubbles trapped inside.

b)

The solid is less dense than water.

c)

The liquid was very hot.

d)

Pure water is denser than impure water.

113.

The specific heat of water is 1 calorie/

 °\degree  C-gram, and the spcifiicheat of a metal is about 0.1calorie/ \degree  C-gram.  If the same amount of heat energy is applied to the same mass of water and the metal, which is the correct comparison of the changes in temperature?

a)

The increase in temperature will about 10 times great in the metal than the water.

b)

The increase in temperature will be about 0.1 times as great in the metal as the water.

c)

The temperature of the water will increase and the teperature of the metal will decrease.

d)

the temperatrue increase will be the same but will be faster in the water.

114.

An oxygen atom has eight protons and a hydrogen atom has one proton. How many electrons are there in a hydroxide ion?

a)

8

b)

9

c)

10

d)

None of the above

115.

Which of the following is not a property of water?

a)

cohesive behavior

b)

high specific heat

c)

constant volume upon freezing

d)

ability to dissolve many substances

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