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Unit 1 Chemistry of Life Practice Test

Total questions: 127

Worksheet time: 3hrs 13mins

Name
Class
Date
1.
Why does water move from the roots to the leaves of plants?
a)
Water is pushed by solutes.
b)
Capillary action pulls the water molecules like a chain.
c)
Water is pulled by gravity.
d)
Water’s cohesion causes it to “pull” towards the leaves.
2.
Water expands as it freezes
a)
True
b)
False
3.

Refer to the picture; this is occurring because of:

a)

Cohesion

b)

Adhesion

c)

Capillary action

d)

Surface tension

4.

The diagram has shown the WATER molecules. What is A

a)

Hydrogen

b)

Oxygen

c)

Carbon dioxide

d)

Helium

5.

The diagram has shown the WATER molecules. What is B

a)

Hydrogen

b)

Oxygen

c)

Carbon dioxide

d)

Helium

6.

Ice floats because

a)

It's really cold

b)

It is shaped like a square

c)

less dense than liquid water

d)

more dense than liquid water

7.

Draw a water molecule.

8.

What two atoms make up Water?

a)

Nitrogen

b)

Oxygen

c)

Carbon

d)

Hydrogen

9.

Which is NOT a property of water?

a)

Water has a high specific heat capacity

b)

Water is a polar molecule

c)

Water molecules cannot bond with other water molecules

d)

Water is more dense as a liquid than as a solid

10.

Which answer best describes cohesion?

a)

Water molecules are attracted to other molecules

b)

Water molecules are polar

c)

Water molecules are attracted to other water molecules

d)

Water moves up against gravity in plants

11.

How can a water strider walk on water?

a)

It doesn't

b)

It is heavy enough to bend the water

c)

It uses adhesion to its advantage

d)

The property of cohesion

12.

What property of water is mostly shown here? (Water droplets)

a)

High Specific Heat

b)

Density

c)

Cohesion

d)

Universal Solvent

13.

Which atom(s) in a molecule of water is/are partially positive?

a)

Oxygen

b)

Carbon

c)

Nitrogen

d)

Hydrogen

14.

The atom in water that is partially negative is...

(a)  

15.

What property of water deals with ice floating?

a)

Cohesion

b)

Adhesion

c)

Density

d)

Capillary Action

16.

How does ice float?

a)

As water freezes, the space between molecules expand, decreasing its density

b)

As water freezes, it takes up more oxygen from the air, increasing its density

c)

As water freezes, it takes up more hydrogen, increasing its density

17.

Water is referred to as the 'universal' solvent because it...

a)

Dissolves everything

b)

Is dissolved by most things

c)

Dissolves most things

d)

Can be found anywhere

18.

Surface tension is the tendency of a liquids surface to resist rupture when under tension or stress. What property of water gives water this ability?

a)

Adhesion

b)

Density

c)

Cohesion

d)

Solvent

19.

Capillary action is the result of waters properties of cohesion and adhesion working together to allow water to...

a)

Absorb water through the roots of plants

b)

Stick to other things

c)

Stick to itself

d)

Flow upward against the force of gravity

20.

When water freezes, the space between molecules...

a)

Contract

b)

Combine

c)

Condense

d)

Expand

21.

What property of water allows for hydrogen bonding?

a)

Water as a solvent

b)

Water is polar

c)

Water has a high specific heat

d)

Water is less dense as a solid

22.

Water dissolves many ionic and polar substances because of waters...

a)

Ionic bonding

b)

Covalent bonding

c)

Specific heat

d)

Polarity

23.

Waters temperature changes...

a)

Quickly, without adding much energy

b)

Slowly, by adding a lot of energy

c)

Slowly, without adding much energy

d)

Quickly, by adding no energy

24.

The "film" that forms on top of water is referred to as...

a)

Adhesion

b)

Capillary action

c)

Surface tension

d)

Cohesion

25.
 Small insects can walk across the surface of calm water. Their feet push the surface of the water down slightly, somewhat like a person walking across a trampoline, but they do not break the surface. What is the best explanation for why this happens?
a)
The insects are light enough so that 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 insects' 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
26.
The fact that ice floats on liquid water is due to the fact that water's solid is ___________ than it's liquid form
a)
less polar
b)
more polar
c)
less dense
d)
more dense
27.
The tightness across the surface of water that enables paper clips to float is ____________.
a)
adhesion
b)
capillary action
c)
surface tension
d)
polarity
28.
When a molecule has an opposite electrical charge on each end, it is known as what?
a)
cohesion
b)
polar molecule
c)
hydrogen bond
d)
solution
29.
When water molecules stick easily to other water molecules, this is called what?
a)
cohesion
b)
adhesion
c)
solution
d)
polar molecule
30.

The ability of water molecules to stick to each other, creating surface tension is called:

a)

Cohesion

b)

Adhesion

c)

Insulation

d)

Ph

31.

What property of water allows for water to act as a temperature regulator for the world?

a)

Cohesive Behavior

b)

Expansion Upon Freezing

c)

High Specific Heat

d)

Universal Solvent

32.

What property of water causes these Alka-Seltzer tablets to dissolve?

a)

Universal Solvent

b)

Expansion Upon Freezing

c)

Cohesive Behavior

d)

High Specific Heat

33.
Why does water move from the roots to the leaves of plants?
a)
Water is pushed by solutes
b)
Capillary action pulls the water molecules like a chain
c)
Water is pulled by gravity
d)
Water’s cohesion causes it to “pull” towards the leaves
34.

Capillary action is when water moves up a thin tube such as the xylem in plants or chromatography paper pulls water upwards against gravity. This phenomena is due to.....

a)

adhesion

b)

cohesion

c)

a combination of adhesion and cohesion

d)

surface tension

35.

Attractions between water molecules are called ....

a)

Covalent bonds

b)

Ionic bonds

c)

Polar bonds

d)

Hydrogen bonds

36.

A frozen lake in winter with fish swimming below the surface is possible because of which property of water:

a)

cohesion

b)

adhesion

c)

low molecular weight

d)

polarity

37.
Enzymes are considered to be 
a)
Lipids
b)
Carbohydrate
c)
Protein
d)
Nucleic Acid
38.
What is the purpose  of an enzyme?
a)
give permission for the reaction
b)
raise activation energy
c)
speed up reactions
d)
control how many reactions occur
39.
Where do substrates bind on an enzyme?
a)
voltage-gated channels
b)
surface receptor
c)
calcium channels
d)
active site
40.
Enzymes are capable of increasing the rate of a chemical reaction within a living cell.  Enzymes accomplish this through which of the following means?
a)
reducing the number of products   
b)
reducing the activation energy
c)
increasing the temperature of the cell
d)
increasing the concentration of reactants 
41.
What is structure A?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
42.
What is structure D?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
43.
What is structure E, F, G?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
44.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
45.
Each enzyme only has 1 substrate that will fit its active site.  What is this called?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
46.
What 3 letters do enzymes typically end in?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
47.
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
48.
The "lock and key hypothesis" attempts to explain the mechanism of?
a)
Vacuole formation
b)
Pinocytosis
c)
Sharing of electrons
d)
Enzyme specificity 
49.
Any substance that is acted upon by an enzyme is called a(n)?
a)
Coenzyme
b)
Substrate
c)
Vitamin
d)
Polypeptide
50.
Which chemical is classified as an enzyme?
a)
Galactose
b)
Lipid
c)
Protease
d)
Manganese dioxide
51.
What is the purpose  of an enzyme?
a)
give permission for the reaction
b)
raise activation energy
c)
speed up reactions
d)
control how many reactions occur
52.
Where do substrates bind on an enzyme?
a)
voltage-gated channels
b)
surface receptor
c)
calcium channels
d)
active site
53.
Enzymes are capable of increasing the rate of a chemical reaction within a living cell.  Enzymes accomplish this through which of the following means?
a)
reducing the number of products   
b)
reducing the activation energy
c)
increasing the temperature of the cell
d)
increasing the concentration of reactants 
54.
What is structure A?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
55.
What is structure D?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
56.
What is structure C?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
57.
What is structure E, F, G?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
58.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
59.
Each enzyme only has 1 substrate that will fit its active site.  What is this called?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
60.
What 3 letters do enzymes typically end in?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
61.
The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?
a)
Enzymes increase the energy of the reactants.
b)
Enzymes decrease the energy level of the products.
c)
Enzyme decrease the activation energy of the reaction.
d)
Enzymes reverse the direction of the reaction.
62.
Which chemical is classified as an enzyme?
a)
Galactose
b)
Lipid
c)
Protease
d)
Manganese dioxide
63.
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
64.
This is the most important factor about an enzyme that determines what job it will do in the body.
a)
The sugars that make up the enzyme
b)
The nucleic acids that make up the protein
c)
The shape of the enzyme
d)
The fatty acids that make up the protein
65.
Enzyme A digests proteins in the stomach (environment with a pH of 2).  Enzyme B digests proteins in the small intestine (environment with a pH of 8). Which of the following is NOT true:
a)
Enzyme A would be denatured in the small intestine.
b)
Enzyme A works best in acidic conditions.
c)
Enzyme A can also work in the small intestine.
d)
Enzyme A helps in the hydrolysis of proteins.
66.
Based on the graph, what would happen to the enzyme activity if the temperature increased from 35oC to 45oC
a)
increase enzyme activity
b)
decrease enzyme activity
c)
no change
67.

In the diagram, what is letter A?

a)

product

b)

enzyme-substrate complex

c)

substrate

d)

active site

68.

Letter C...

a)

products

b)

substrate

c)

enzymes

d)

active site

69.

Letter B...

a)

substrate

b)

active site

c)

enzyme

d)

products

70.

Things that affect enzyme activity...

a)

Temperature, pH, Concentration, Inhibitors.

b)

Substrate, pH, product, Inhibitors

c)

Temperature, humidity, pH, Inhibitors

d)

Concentration, pH, product, Inhibitors

71.

Draw a subtrate entering an active site of enzyme.

72.

Macromolecule

a)

a very large organic molecule composed of many smaller molecules (critical to all living things)

b)

one unit of a macromolecule

c)

strand of many monomers

d)

chemical substance that can not be broken down into simpler substances and are primary constituents of matter

73.

monomer

a)

a very large organic molecule composed of many smaller molecules (critical to all living things)

b)

one unit of a macromolecule

c)

strand of many monomers

d)

chemical substance that can not be broken down into simpler substances and are primary constituents of matter

74.

carbohydrate

a)

macromolecule made up of carbon, hydrogen, and oxygen atoms; major source of energy for the human body

b)

macromolecule, such as fats, oils, and waxes, that are made of carbon, hydrogen, and oxygen, hydrophobic

c)

Macromolecule that contains carbon, hydrogen, oxygen, and nitrogen. Source of energy. Needed by tissue for repair and growth. Made up of 20 amino acids.

d)

macromolecule containing hydrogen, oxygen, nitrogen, carbon, and phosphorus

75.

lipid

a)

macromolecule made up of carbon, hydrogen, and oxygen atoms; major source of energy for the human body

b)

macromolecule, such as fats, oils, and waxes, that are made of carbon, hydrogen, and oxygen, hydrophobic

c)

Macromolecule that contains carbon, hydrogen, oxygen, and nitrogen. Source of energy. Needed by tissue for repair and growth. Made up of 20 amino acids.

d)

macromolecule containing hydrogen, oxygen, nitrogen, carbon, and phosphorus

76.

protein

a)

macromolecule made up of carbon, hydrogen, and oxygen atoms; major source of energy for the human body

b)

macromolecule, such as fats, oils, and waxes, that are made of carbon, hydrogen, and oxygen, hydrophobic

c)

Macromolecule that contains carbon, hydrogen, oxygen, and nitrogen. Source of energy. Needed by tissue for repair and growth. Made up of 20 amino acids.

d)

macromolecule containing hydrogen, oxygen, nitrogen, carbon, and phosphorus

77.

nucleic acid

a)

macromolecule made up of carbon, hydrogen, and oxygen atoms; major source of energy for the human body

b)

macromolecule, such as fats, oils, and waxes, that are made of carbon, hydrogen, and oxygen, hydrophobic

c)

Macromolecule that contains carbon, hydrogen, oxygen, and nitrogen. Source of energy. Needed by tissue for repair and growth. Made up of 20 amino acids.

d)

macromolecule containing hydrogen, oxygen, nitrogen, carbon, and phosphorus

78.
Is found in the cell membrane as a bilayer. 
a)
lipids
b)
protein
c)
nucleic acid
d)
carbohydrate
79.
Which macromolecule stores energy, insulates us, and makes up the cell membrane?
a)
lipids
b)
proteins
c)
carbohydrates
d)
nucleic acids
80.
Proteins are made of... 
a)
C H O
b)
C H O N
c)
C H O N P
d)
C H O N S
81.
Which major macromolecule is being represented in this image? 
a)
carbohydrate
b)
lipid
c)
protein
d)
nucleic acid
82.
Which of the following contains the genetic code for protein synthesis?
a)
carbohydrate
b)
lipid
c)
protein
d)
nucleic acid
83.
What type of macromolecule is being represented in this image? 
a)
carbohydrate
b)
lipid
c)
protein
d)
nucleic acid
84.
What are the building blocks of proteins?
a)
amino acid
b)
fatty acid
c)
nucleotide
d)
lipid
85.
What are the single sugars that are the building blocks of carbohydrates?
a)
monosaccharides
b)
disaccharides
c)
polysaccharides
d)
amino acid
86.
The element _______is found in all of the organic compounds.
a)
Iron
b)
Nitrogen
c)
Carbon
d)
Oxygen
87.
Proteins are made of monomers called ___________
a)
Nucleotides
b)
Monosaccharides
c)
Amino Acids
d)
Glycerol and fatty acids
88.
DNA and RNA are examples of 
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
89.
Nucleotides are monomers of
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
90.
Waxes, oils and fats are examples of
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
91.

Which macromolecule is shown?

a)

lipid

b)

protein

c)

nucleic acid

d)

carbohydrate

92.
What type of macromolecule are enzymes?
a)
Protein
b)
Carbohydrate
c)
Lipid
d)
Nucleic Acid
93.
Carbohydrates are made of... 
a)
C H O
b)
C H O N
c)
C H O N P
d)
C H O N S
94.
What is the primary function of carbohydrates in your body?
a)
Speed up chemical reactions.
b)
Give immediate energy.
c)
Help to store energy.
d)
Build cell walls in plants.
95.

What macromolecule is shown?

a)

Lipids

b)

Proteins

c)

Carbohydrates

d)

Nucleic Acids

96.

What macromolecule is shown?

a)

Carbohydrates

b)

Lipids

c)

Nucleic Acids

d)

Proteins

97.

What macromolecule is shown?

a)

Nucleic Acids

b)

Lipids

c)

Proteins

d)

Carbohydrates

98.

What macromolecule is shown?

a)

Protein

b)

Nucleic Acid

c)

Carbohydrate

d)

Lipid

99.

This macromolecule breaks down into sugars such as glucose.

a)

Lipids/Fats

b)

Nucleic Acids

c)

Protein

d)

Carbohydrates

100.

Which macromolecule stores energy?

a)

Carbohydrates

b)

Proteins

c)

Lipids/Fats

d)

Nucleic Acids

101.

Which of the following elements are found in all macromolecules? (Select all that apply).

a)
b)
c)
d)
102.

What is the purpose of a microscope?

a)

To make objects appear larger

b)

To study living organisms

c)

To magnify light

d)

To clean microscope lenses

103.

Which type of microscope is more powerful?

a)

Simple microscope

b)

Compound microscope

c)

Electron microscope

d)

Hand lens

104.

What is the total magnification of a microscope with an eyepiece magnification of 10x and an objective lens magnification of 40x?

a)

400x

b)

50x

c)

4000x

d)

100x

105.

What type of slide would you use to study organisms living in pond water while they are still alive?

a)

Temporary slide

b)

Permanent slide

c)

Cover slip

d)

Base

106.

What is the advantage of using a permanent slide?

a)

It can be stored and studied over and over again

b)

It is made of glass and is about 7.5 cm x 2.5 cm

c)

It rests on the glass slide

d)

It allows light to pass through

107.

How should a microscope be held?

a)

With one hand holding the arm and the other supporting the base

b)

With one hand holding the eyepiece and the other supporting the stage

c)

With one hand holding the diaphragm and the other supporting the mirror

d)

With one hand holding the nosepiece and the other supporting the body tube

108.

What should be used to clean microscope lenses?

a)

Special lens paper

b)

Regular tissues

c)

Cloth

d)

Lab partners t-shirt

109.

Which part of the microscope is responsible for adjusting the amount of light entering the stage area?

a)

Diaphragm

b)

Eyepiece

c)

Fine adjustment knob

d)

High-power objective

110.

Label the parts 1-10 microscope.

a)

Objective Lens

b)

Diaphragm

c)

Light Source

d)

Coarse Adjustment Knob

e)

Stage

f)

Stage Clip

g)

Eye Piece (Ocular lens)

h)

Nosepiece

i)

Body Tube

j)

Arm

1
2
3
4
5
6
7
8
9
10
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
111.

Label part 11-12 on the microscope.

a)

Fine Adjustment Knob

b)

Base

1
2
1)
2)
112.

When viewing a slide under a microscope you should start by using the

a)

lowest objective

b)

highest objective

c)

whichever you want

d)

no objective

113.

These are found on the revolving nosepiece and range from 4x to 100x.

a)

eyepiece

b)

diaphragm

c)

objective lense

d)

stage

114.
What will be the total magnification if the ocular lens is 10X and the objective lens is 10X?
a)
10X
b)
100X
c)
1000X
d)
1X
115.

If you move the slide down while viewing, in which direction will it appear to move?

a)

right

b)

left

c)

up

d)

down

116.

The greater the ___________________, the smaller the field you are actually viewing.

a)

detail

b)

objective

c)

magnification

d)

body

117.
Which type of microscope would you use to see the outside of a paramecium at 1000X magnification?
a)
Compound Light
b)
Scanning Electron 
c)
Dissecting
d)
Transmission Electron
118.

What do we call the platform where we place our sample for observation on a microscope?

a)

base

b)

center

c)

plate

d)

stage

119.

What is the name of this part of the microscope?

a)

stageclips

b)

leg

c)

objective lens

d)

coarse adjustment knob

120.

What is the name of this part?

a)

objective lens

b)

eyepiece/ocular lens

c)

diaphragm

d)

slide

121.

What is the name of this part?

a)

stageclips

b)

stage

c)

nosepiece

d)

slide

122.
When you focus on a new specimen, always begin with
a)
low power and coarse adjustment.
b)
low power and fine adjustment
c)
high power and coarse adjustment
d)
high power and fine adjustment
123.

What is the type of microscope we use in the lab?

a)

transmission electron microscope

b)

phase contrast microscope

c)

compound light microscope

d)

fluorescence microscope

124.

What is the purpose of the diaphragm on the microscope?

a)

It is the light source

b)

It regulates the amount of light

c)

Supports the stage

d)

Used for first focusing

125.

This adjustment is used first on low power (red lens)

a)
eyepiece
b)
fine adjustment
c)
coarse adjustment
d)
nosepiece
126.
What moves the stage slowly?
a)
Fine adjustment
b)
Course adjustment
127.

When is it okay to go to a higher magnification and use the fine focus?

a)

First thing when you get the slide.

b)

After you have located the specimen using lower magnification and coarse focus

c)

When you are done looking at the slide.

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