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Unit 2: Biochemistry

Total questions: 114

Worksheet time: 2hrs 8mins

Name
Class
Date
1.

Carbon compounds that come from living organisms are called _____ compounds.

a)

biological

b)

homogeneous

c)

water

d)

organic

2.

Which is NOT an organic compound?

a)

carbohydrates

b)

water

c)

nucleic acids

d)

proteins

3.

Which of the following is NOT paired correctly?

a)

glucose- carbohydrate

b)

fat- lipid

c)

starch-nucleic acid

d)

enzyme-protein

4.

The main function of carbohydrates is

a)

to provide quick energy

b)

to store backup energy

c)

to store genetic information

d)

to speed up chemical reactions

5.

Which of the following macromolecules store energy, provide insulation, and assist in buoyancy?

a)

nucleic acids

b)

proteins

c)

lipids

d)

carbohydrates

6.

A lipid molecule is best represented by which diagram.

a)

A

b)

B

c)

C

d)

D

7.

Which diagram represents a macromolecule that is responsible for genetic coding?

a)

A

b)

B

c)

C

d)

D

8.

Which diagram represents a molecule found in fats, oils, and waxes?

a)

A

b)

B

c)

C

d)

D

9.

Which diagram represents a macromolecule that is found in fish, meat, and eggs?

a)

A

b)

B

c)

C

d)

D

10.

Which diagram represents a molecule that is found in sugar, starches, and grains?

a)

A

b)

B

c)

C

d)

D

11.

Enzymes affect the reactions in living cells by changing the

a)

products of the reaction

b)

pH of the reaction

c)

temperature of the reaction

d)

speed of the reaction

12.

Use the diagram to identify the enzyme, substrate, active site and products (in that order)

a)

c,d,a,b

b)

d,a,b,c

c)

b,c,a,d

d)

c,a,b,d

13.

Why can’t a denatured enzyme do it’s job?

a)

it’s shape has been altered

b)

it’s a polypeptide

c)

too many reactants involved

d)

to many products created

14.

Which of the following roles of water is not paired with a correct example of that property of water?

a)

adhesion- water causing a curve up the side of a graduated cylinder

b)

almost universal solvent- removal of baked on food from a pan sitting in water

c)

changes density when frozen- ice sinks

d)

high specific heat capacity- fish not boiling in the lake on a hot summer day

15.

Which atom/element likes to and easily bonds to itself as well as many different atoms?

a)

hydrogen

b)

oxygen

c)

carbon

d)

nitrogen

16.

What is the name of this molecule?

a)

dextrose

b)

maltose

c)

starch

d)

glucose

17.
The image below shows a polymer of glucose molecules. What type of macromolecule is this?
a)
carbohydrate
b)
protein
c)
lipid
d)
nucleic acid
18.
An unknown molecule contains a sugar and a phosphate group. It is likely what?
a)
carbohydrate
b)
protein
c)
lipid
d)
nucleic acid
19.
Larger polymers are formed when monomers are joined together by a _______ reaction.
a)
dehydration synthesis
b)
digestion
c)
hydrolysis
d)
redox
20.
What is the monomer of proteins?
a)
monosaccharides
b)
amino acids
c)
phospholipids
d)
nucleotide
21.
Which of the macromolecules contain nitrogen?
a)
proteins only
b)
nucleic acids only
c)
proteins and lipids
d)
nucleic acids and proteins
22.
What is the function of fats for living organisms?
a)
short term energy storage
b)
store hereditary information
c)
long term energy storage
d)
catalyze metabolic reactions
23.
Identify the macromolecule in the image below.
a)
carbohydrate
b)
nucleic acid
c)
protein
d)
lipid
24.
How are the subunits of proteins linked together?
a)
ionic bonds
b)
amino acids
c)
monomers
d)
peptide bonds
25.
Which statement about polymers is not true?
a)
polymers consist of more than one type of monomer
b)
polymers are broken down through hydrolysis
c)
polymers are synthesized through dehydration synthesis
d)
All are untrue
26.
Which 4 elements make up most of all living matter?
a)
Carbon, Hydrogen, Nitrogen, Oxygen
b)
Carbon, Oxygen, Sodium, Potassium
c)
Carbon, Hydrogen, Calcium, Nitrogen
d)
Carbon, Oxygen, Nitrogen, Sulfur
27.
Which of the following is NOT involved in capillary action in plants?
a)
Capillary ActXylem (transport tissue)ion
b)
Adhesion
c)
Cohesion
d)
pH
28.
When atoms share electrons unequally...
a)
a nonpolar covalent bond is formed.
b)
an ionic bond is formed.
c)
a polar covalent bond is formed.
d)
a hydrogen bond is formed.
29.
Which type of lipid forms the primary structure of the cell membrane?
a)
triglycerides
b)
wax
c)
cholesterol
d)
phospholipid
30.
When water freezes the molecules form a matrix by forming hydrogen bonds and
a)
sinking in water
b)
becomes more dense than water
c)
becomes less dense than water
d)
becoming more tightly packed
31.
Which of these is the electron?
a)
A
b)
B
c)
C
d)
D
32.
If an element has an atomic number of 26 and an atomic mass of 56, how many neutrons does it have?
a)
26
b)
30
c)
56
d)
82
33.
In which type of bond are electrons transferred?
a)
Non-polar Covalent Bonds
b)
Polar Covalent Bonds
c)
Ionic Bonds
d)
Hydrogen Bonds
34.
Water is polar because...
a)
The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.
b)
The molecule has two poles, at which the it is colder than other regions of the molecule.
c)
The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.
d)
The water molecule is neutral.
35.
Water molecules require a lot of energy to separate one from the others.  This gives water a high
a)
density
b)
polarity
c)
solvency
d)
specific heat
36.
Tendency of molecules of the same kind to stick to one another
a)
cohesion
b)
adhesion
c)
solution
d)
polar molecule
37.
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
38.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-5
d)
1-20
39.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
40.
What type of substance regulates the pH of the body by releasing and capturing H+ ions?
a)
Alkalines
b)
Buffers
c)
Neutralizers
d)
Hydrogenators
41.
Monomers combine to form ________ through the process of ________.
a)
polymers; hydrolysis
b)
polymers; dehydration synthesis
c)
monomers; hydrolysis
d)
monomers; dehydration synthesis
42.
Is this a picture of a saturated or unsaturated fatty acid?
a)
Saturated fatty acid
b)
Unsaturated fatty acid
43.
What type of macromolecule is an enzyme?
a)
Carbohydrate
b)
Lipid
c)
Protein
d)
Nucleic Acid
44.
Enzymes are able to speed up chemical reactions because they - 
a)
increase the temperature inside the cell
b)
reduce the friction between the reactants
c)
make the raw materials more chemically reactive
d)
lower the activation energy of the reaction
45.
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
46.
Which of these do NOT affect enzyme activity?
a)
Temperature
b)
pH
c)
Competitive Inhibitors
d)
Carbohydrates
47.
Once a new product leaves an enzyme, the enzyme is unchanged and ready for the next substrate.  What is this called?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
48.
The part of the enzyme that the substrate bonds to is called the _____.
a)
active site
b)
activation energy
c)
bond site
d)
peptide bond
49.
What is being represented by the letter B in the image?
a)
Substrate
b)
Enzyme
c)
Substrate
d)
Product
50.
Which of the following conclusions can be drawn from this graph?
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 .
51.
Starch is composed of what monomers?
a)
sucrose
b)
glucose
c)
nucleic acids
d)
glycogen
52.

What are the parts of a nucleotide?

a)

nitrogen base and phosphate group

b)

Nitrogen base

c)

5 carbon sugar and nitrogen base

d)

nitrogen base, 5 carbon sugar, and phosphate group

53.

what are fats made of ?

a)

lipid with 3 fatty acids

b)

lipids

c)

lipid with 2 fatty acids

d)

none of the above

54.

what is it called when water molecules split?

a)

dehydration

b)

hydrolysis

c)

denature

d)

magic

55.

diffrent for each amino acid

a)

enzyme

b)

r group

c)

protein function

d)

s group

56.

DNA is...

a)

single stranded

b)

doesn't exist

c)

double stranded

d)

is RNA but in disguise

57.

amino acids are monomers to...

a)

carbohydrates

b)

lipids

c)

proteins

d)

amino acids

58.

what are the functions of proteins ?

a)

transport, hormone and enzymes

b)

transport, enzymes, and structural support

c)

transport, enzyme,structual support and hormone

d)

hormone,enzyme,transport, structural support, and regulation

59.

saturated fat is ...

a)

liquid, no hydrogens

b)

liquid , saturated with hydrogens

c)

solid, saturated with hydrogens

d)

solid, no hydrogens

60.
Which particle has a positive charge?
a)
electron
b)
orbital
c)
proton
d)
neutron
61.
Atomic mass is equal to the number of...
a)
Protons + Electrons
b)
Electrons + Neutrons
c)
Protons + Neutrons
d)
Electrons
62.
the central region of an atom where its neutrons and protons are is its 
a)
nucleus 
b)
electron cloud
c)
core 
d)
center 
63.
Particles in an atom that are neutral and have no charge are 
a)
negatrons 
b)
electrons 
c)
neutrons 
d)
protons 
64.
Which of the following is a negatively charged subatomic particle?
a)
Electron
b)
Proton
c)
Neutron
d)
Quark
65.
The building blocks of matter
a)
Mass Number
b)
Atoms
c)
Nobel Gases
d)
Isotopes
66.
Large bodies of water do not quickly fluctuate in temperature. Why?
a)
Water is a solvent.
b)
Water has a high heat capacity.
c)
Water acts as a buffer.
d)
Water is non-polar.
67.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
68.
A molecule with electrically charged areas is called a _______________.
a)
magnet
b)
polar molecule
c)
solution
d)
electrical molecule
69.
What type of bond is between two water molecules?
a)
Covalent bond
b)
Ionic bond
c)
Hydrogen bond
d)
Nonpolar bond
70.
What is the thin film that forms on the surface of a body of water; allows insects to float?
a)
high specific heat
b)
viscosity
c)
surface tension
d)
capillary action
71.
substance in a solution that dissolves the other substance and is present in the greater amount
a)
solvent
b)
solute
c)
solution
d)
acid
72.
What type of bond forms when 2 or more electrons are SHARED?
a)
Covalent bond
b)
Incomplete bond
c)
Ionic bond
d)
Metallic bond
73.
A positively or negatively charged particle
a)
Oxidation number
b)
Compound
c)
Ion
d)
Neutron
74.
A chemical bond between oppositely charged ions.
a)
Chemical Bond
b)
Ionic Bond
c)
Covalent Bond
d)
Shared Bond
75.
Substance made from two or more combined atoms
a)
Chemical Bond
b)
Compound
c)
Chemical Formula
d)
Oxidation Number
76.

How do atoms become more stable?

a)

They bond with other atoms in order to have a full outer shell of electrons.

b)

They change their state of matter.

c)

The energy moves from potential to kinetic.

77.
Which biomolecule is this a picture of?
a)
Protein
b)
Nucleic Acid
c)
Lipid
d)
Carbohydrate
78.
Which biomolecule is this a picture of? (Hint: it is made of amino acids)
a)
Proteins
b)
Nucleic Acids
c)
Lipids
d)
Carbohydrates
79.
Which biomolecule is responsible for insulation and LONG term energy storage?
a)
Proteins
b)
Nucleic Acids
c)
Lipids
d)
Carbohydrates
80.
Which biomolecule includes sugars and starches? (Hint: simple or complex)
a)
Lipids
b)
Proteins
c)
Carbohydrates
d)
Nucleic Acids
81.
Which biomolecule group includes fats, oils, and waxes?
a)
Proteins
b)
Nucleic Acid
c)
Lipids
d)
Carbohydrate
82.
The monomer (building block) of a nucleic acid is
a)
Monosaccharide
b)
Amino Acid
c)
Nucleotide
d)
Polysaccharide
83.

Polymer's split apart to form ________, by __________.

a)

monomers, hydrolysis

b)

monomers, dehydration synthesis

c)

amino acids, hydrolysis

d)

amino acids, dehydration synthesis

84.
Which 2 molecules contains the elements C-H-O and function pertains to energy?
a)
Lipids and Protein
b)
Carbohydrates and Nucleic Acids
c)
Protein and Carbohydrates
d)
Carbohydrates and Lipids
85.
Proteins are composed of what smaller building blocks?
a)
amino acids
b)
nucleic acids
c)
fatty acids
d)
nucleotides
86.

In the graph, the energy level needs to increase before it goes back down. The increase is called the:

a)

enzyme energy

b)

substrate

c)

activation energy

d)

active site

87.

What is shown?

a)

Increasing the temperature does not affect the rate of the reaction.

b)

Increasing the temperature increases the rate of reaction until too high a temperature is reached.

c)

Increasing the reaction rate will cause a change in the temperature.

88.

In the figure, why doesn't the reaction rate continue to increase as the temperature increases?

a)

It does.

b)

It reaches the saturation point where no active site is bonded to the activation energy.

c)

At too high of a temperature, the protein changes shape and can no longer function.

89.

Letter D...

a)

active site

b)

enzyme

c)

substrate

d)

products

90.
What is the name of this molecule?
a)
amino acid
b)
nucleotide
c)
monosaccharide
d)
triglyceride
91.

Letter C...

a)

active site

b)

enzyme

c)

substrate

d)

products

92.
Which biomolecule contain your genetics?
a)
Carbohydrate
b)
Lipid
c)
Nucleic Acid
d)
Protein
93.
The conditions for an enzyme to work need to be ____________
a)
specific
b)
normal
c)
variable
d)
don't matter
94.
If you want a reaction to speed up you need an _________.
a)
nucleic acid
b)
enzyme
c)
nerve cell
d)
carbohydrate
95.
What is the function of a nucleic acid?
a)
Stores genetic information
b)
Stores energy
c)
Quick source of energy
d)
Builds structures
96.

The prefix "poly" means...

a)

One

b)

Two

c)

Many

d)

Want a cracker

97.

The prefix "mono" means...

a)

Two

b)

One

c)

Many

d)

Few

98.
This molecule is a
a)
carbohydrate
b)
nucleic acid
c)
protein
d)
lipid
99.
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, what is the dependent variable?
a)
Type of plant
b)
Water, apple juice, milk
c)
Plant growth
100.
A student is planning an experiment to find out how the height from which he drops a ball affects how high the ball bounces. The dependent variable is the _____.
a)
Diameter of the ball
b)
Force acting on the ball
c)
Height that the ball bounces
d)
Height from which the ball is dropped
101.
Saturated fats have this type of structure:
a)
kinky with double bonds between carbons
b)
4-fused carbon rings
c)
straight with single carbon bonds
d)
rectangular with triple carbon bonds
102.
Which of the following conclusions can be drawn from this graph?
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 .
103.

Double bond between Carbon and Hydrogen chains.

Tends to be liquid at room temperature like oils.

a)

Polysaccharides

b)

Lipids

c)

Saturated Fats

d)

Unsaturated Fats

104.

Single bond between Carbon and Hydrogen chains.

Tends to be solid at room temperature like butter.

a)

Saturated Fats

b)

Unsaturated Fats

c)

Carbohydrates

d)

Proteins

105.

Which is NOT a characteristic of all living things?

a)

Universal genetic code (DNA)

b)

Ability to move

c)

Made of cells

d)

Obtain materials and use energy

e)

None of the above

106.

What are the three subatomic particles of an atom?

a)

protons, electrons, neutrons

b)

protons, photons, neutrons

c)

electrons, neutrons, photons

d)

photons, lightrons, introns

107.

Which subatomic particles are found in the nucleus of an atom?

a)

protons, electrons, and neutrons

b)

electrons and protons

c)

protons and neutrons

d)

neutrons and electrons

108.

What is the atomic number of chlorine

a)

17

b)

35

c)

52

d)

18

109.

How many electrons does chlorine contain?

a)

17

b)

35

c)

52

d)

18

110.

If chlorine has 17 protons, how many neutrons would it have?

a)

17

b)

35

c)

52

d)

18

111.

This is a type of bond in which atoms share electrons

a)

ionic

b)

hydrogen

c)

polar

d)

covalent

112.

This is a type of bond in which one atom gains an electron while the other atom loses an electron

a)

ionic

b)

hydrogen

c)

polar

d)

covalent

113.

An ionic bond is formed when sodium (Na) loses an electron to chlorine (Cl). In this case the Na ion would carry what type of charge

a)

-1

b)

-2

c)

+1

d)

+2

114.

Carbon has four valence electrons, how many bonds can it form?

a)

1

b)

2

c)

4

d)

8

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