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Chapter 2ML Review Biochemistry

Total questions: 128

Worksheet time: 2hrs 43mins

Name
Class
Date
1.

Which pair is incorrect?

a)

carbohydrates - provide energy

b)

lipids - provide insulation

c)

nucleic acids - store hereditary information

d)

proteins - provide energy

2.

Which is false?

a)

Enzymes bind to a substrate.

b)

Enzymes slow down chemical reactions.

c)

Enzymes lower the activation energy.

d)

Enzymes are affected by temperature and pH.

3.

Which group of organic molecules serve as long-term energy storage and make the cell membrane is?

a)

proteins

b)

carbohydrates

c)

lipids

d)

nucleic acids

4.

Proteins are composed of what smaller building blocks?

a)

amino acids

b)

nucleic acids

c)

fatty acids

d)

nucleotides

5.

Glucose is a _____.

a)

carbohydrate

b)

lipid

c)

protein 

d)

nucleic acid

6.

How many different amino acids are there?

a)

4

b)

20

c)

6

d)

46

7.

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

8.

The type of polysaccharide which serves as a strengthening tissue in the cell wall of plants is 

a)

cellulose

b)

glucose

c)

lactose

d)

fructose

9.

What property of water makes it the 'universal solvent'?

a)

it is a polar molecule

b)

it is an ionic compound

c)

it contains hydrogen bonds

d)

it steals electrons from other atoms

10.

What do disaccharides, such as sucrose, and polysaccharides, such as starch, have in common?

a)

They are lipids made of fatty acids.

b)

They are proteins made of amino acids.

c)

They are nucleic acids made of nucleotides.

d)

They are carbohydrates made of simple sugars.

11.

Building blocks of polymers.

a)

monomer

b)

polypeptide

c)

monosaccharide

d)

glycerol

12.

Which of the following binds to the active site of an enzyme? 

a)

substrate

b)

product

c)

codon

d)

none of the above

13.

Enzymes are

a)

nucleic acids

b)

proteins

c)

lipids

d)

carbohydrates

14.

Which is the wrong polymer/monomer pair?

a)

nucleic acids : nucleotides

b)

lipids: monosaccharides

c)

carbohydrates: monosaccharides

d)

proteins : amino acids

15.

Both animal fats and plant oils are made up of glycerol and

a)

polar molecules

b)

phospholipids

c)

saturated fats

d)

fatty acids

16.

___________ are the main source of energy for cells.

a)

Proteins

b)

Lipids

c)

Nucleic acids

d)

Carbohydrates

17.

Amino acids are the subunits of ...

a)

proteins

b)

carbohydrates

c)

nucleic acids

d)

lipids

18.

Nucleotides are made up of three parts. The three parts are...

a)

DNA, RNA, and a sugar

b)

a lipid, a fat, and an oil

c)

a carbohydrate, a protein, and a fat

d)

a sugar, a phosphate, and a base

19.

RNA is an example of a ...

a)

nucleic acid

b)

phosphate group

c)

protein

d)

carbohydrate

20.

ATP is...

a)

a unit of energy in the cell

b)

a type of lipid

c)

a molecule of DNA

21.

The building blocks of nucleic acids are called ...

a)

amino acids

b)

nucleotides

c)

carbohydrates

d)

proteins

22.

Why is the structure/order of proteins important?

a)

A change in structure causes a change in the function

b)

The order of proteins is not important

c)

The order determines the effectiveness of the protein

d)

The structure of proteins determines the structure of carbohydrates

23.

The structure labeled E represents-

a)

Products

b)

Enzyme

c)

Substrate

d)

Reactants

24.

Which two bio molecules have only Carbon, Hydrogen, and Oxygen?

a)

Carbs/Nucleic Acids

b)

Lipids/Carbs

c)

Proteins/Nucleic Acids

d)

Carbs/Proteins

25.

DNA and RNA are examples of 

a)

Carbohydrates

b)

Lipids

c)

Proteins

d)

Nucleic Acids

26.

Waxes, oils and fats are examples of

a)

Carbohydrates

b)

Lipids

c)

Proteins

d)

Nucleic Acids

27.

Which macromolecule is shown?
 View Figure 3 (if not visible)

a)

lipid

b)

protein

c)

nucleic acid

d)

carbohydrate

28.

Which macromolecule is shown?
 View Figure 2 (if not visible)

a)

lipid

b)

protein

c)

nucleic acid

d)

carbohydrate

29.

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

30.

This type of lipid is solid at room temperature and found in animal sources.

a)

oils

b)

enzymes

c)

saturated fats

d)

unsaturated fats

31.

This type of lipid is liquid at room temperature and found in plants.

a)

oils

b)

unsaturated fats

c)

saturated fats

d)

both oils and unsaturated fats

32.

The bond that joins two amino acids together

a)

double bond

b)

hydrogen bond

c)

ionic bond

d)

peptide bond

33.

Which of the following is an organic compound?

a)

H2O

b)

C6H12O6

c)

NH2

d)

OH

34.

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 .

35.

What are the four biological molecules?

a)

proteins, carbohydrates, lipids, nucleic acids

b)

A, T, C, G

c)

water, air, earth, and fire

d)

Joe, Nick, and Kevin Jonas

36.

What is the function of a nucleic acid?

a)

Stores genetic information

b)

Stores energy

c)

Quick source of energy

d)

Builds structures

37.

What biomolecule do enzymes belong to? 

a)

Carbohydrate

b)

Lipid

c)

Nucleic Acid

d)

Protein

38.

What is this enzymes optimal temperature?

a)

10*C

b)

40*C

c)

50*C

d)

70*C

39.

Which pair of answers correctly matches the monomer and the polymer?

a)

Glucose- Protein

b)

Amino Acid- Nucleic Acid

c)

Nucleotide - Nucleic Acid

d)

Fatty Acid- DNA

40.

Rice, potatoes, bread and legumes are good sources of _________.

a)

carbohydrates

b)

lipids

c)

proteins

d)

nucleotides

41.

Which of the following is not an importance of proteins

a)

Transport

b)

Storage

c)

Energy

d)

Defense

42.

What organic group is the major component of cell membranes?

a)

lipids

b)

carbohydrates

c)

proteins

d)

nucleic acids

43.

Organic compounds always contain what three elements?

a)

Hydrogen

b)

Nitrogen

c)

Carbon

d)

Oxygen

44.

Water is what type of compound?

a)

organic

b)

inorganic

c)

toxic

45.

Fats, oils, waxes, cholesterol, hormones

a)

carbohydrates

b)

lipids

c)

proteins

d)

nucleic acids

46.

Compound Function: Build organelles, build body parts, and helps with body defense

a)

Proteins

b)

Carbohydrates

c)

Nucleic Acids

d)

Lipids

47.

A water molecule is polar. Its bent shape results in the following...

a)

slightly positive charge on hydrogen and slightly negative charge on oxygen

b)

slightly positive charge on hydrogen and slightly  positive charge on oxygen

c)

slightly negative charge on hydrogen and slightly positive charge on oxygen

d)

no change because its neutral

48.

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

49.

Large bodies of water help to keep nearby climates from being too hot or too cold  because they...

a)

absorb heat in the spring and slowly release that heat in the fall

b)

absorb heat in the fall and slowly release that heat in the spring

c)

absorb heat in the summer and slowly release that heat in the winter

d)

absorb heat in the winter and slowly release that heat in the summer

50.

A high specific heat means water ____. (select all that are true)

a)

takes a long time to change temperature.

b)

takes a lot of heat to increase temperature.

c)

holds a lot of heat.

d)

is good at regulating Earth's temperature.

51.

Enzymes are responsible for-

a)

Speeding up reactions

b)

Giving the body energy

c)

Slowing down reactions

52.

Which of these is most likely an enzyme?  

a)

Sucrose

b)

Galactose

c)

Fructose

d)

Amylase

53.

Letter D...

a)

active site

b)

enzyme

c)

substrate

d)

products

54.

What is a substance called if it speeds up a chemical reaction?

a)

reusable

b)

catalyst

c)

specific

d)

fragile

55.
After the enzyme and substrate bind together and perform the reaction, what does the substrate become?
a)
a substrate
b)
an enzyme
c)
a product
d)
an active site
56.

What happens when enzymes are heated to a high temperature?

a)

The enzymes die.

b)

The shapes of the enzyme are altered denature

c)

The enzymes' amino acid sequence changes.

d)

The enzymes remain the same

57.

Label the parts of the enzyme model

a)

Substrate

b)

Products

c)

Enzyme

d)

Active site

1
2
3
4
1)
2)
3)
4)
58.

Click on the temperature that this enzyme is having optimum activity.

A
B
C
59.
An enzyme speeds up a reaction by
a)
lowering the activation energy.
b)
raising the activation energy.
c)
releasing energy.
d)
absorbing energy.
60.

Match the following Macromolecules to its structure

a)
1.

Carbohydrate

b)
2.

Lipid

c)
3.

Nucleic Acids

d)
4.

Protein

61.

Enzyme can be used again and again

a)

True

b)

False

62.

Enzymes act on many different substrates

a)

True

b)

False

63.
What 3 letters do enzymes typically end in?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
64.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
65.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
66.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
67.

Substances with a pH of 7 are

a)

Acidic

b)

Basic

c)

Neutral

d)

Saturated

68.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-5
d)
1-20
69.

A base is a substance

a)

That releases OH- ions when dissolved in water

b)

That releases H+ ions when dissolved in water

c)

Does not release any ions when dissolved in water

d)

None of the above

70.

An acid

a)

is a substance that releases H+ ions when dissolved in water

b)

is a substance that does not release any ions when dissolved in water

c)

is a substance that releases OH- when dissolved in water

d)

releases an equal amount of OH- and H+ ions when dissolved in water

71.

Water has a neutral because

a)

it has more H+ ions than OH-

b)

it has more OH- ions than H+

c)

it does not produce any ions

d)

it has an equal amount of H+ and OH- in solution

72.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
73.
Bleach is a strong base, what is the pH level of bleach?
a)
13
b)
14
c)
1
d)
2
74.
Bleach is a strong base, what is the pH level of bleach?
a)
13
b)
14
c)
1
d)
2
75.

What is this enzymes optimal temperature?

a)

10*C

b)

40*C

c)

50*C

d)

70*C

76.

Which of the following lines shows the presence of an enzyme?

a)

Black

b)

Red

77.

This is the attraction of water molecules for each other.

a)

cohesion

b)

adhesion

c)

hydrogen bonding

78.

Rice, potatoes, bread and legumes are good sources of _________.

a)

carbohydrates

b)

lipids

c)

proteins

d)

nucleotides

79.

Of all the elements, ________ is the most significant to life.

a)

carbon

b)

hydrogen

c)

nitrogen

d)

gold

80.

The positively charged particle in an atom is the

a)

neutron

b)

proton

c)

ion

d)

electron

81.
Electrons have what charge?
a)
Negative
b)
Positive
c)
Neutral
 (No Charge)
82.

Which of the following is an example of ADHESION?

a)

water sticking to water

b)

water sticking to glass

c)

oil sticking to plastic

d)

hydrogen sticking to oxygen

83.
What is at the center of every atom?
a)
An electron
b)
A compound
c)
A molecule
d)
A nucleus
84.

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

a)
b)
c)
d)
85.

An avocado is an example of a which macromolecule?

a)

Carbohydrate

b)

Lipid/Fat

c)

Protein

d)

Nucleic Acid

86.
Building blocks of the body, hair , muscles etc.
a)
protein
b)
nucleic acid
c)
lipids
d)
carbohydrates
87.

4CF2Cl2

a)

C = 4, F = 4, Cl = 2

b)

C = 1, F = 8, Cl = 8

c)

C = 4, F = 8, Cl = 8

d)

C = 1, F = 4, Cl = 8

88.

A ______ is a number written in front of a chemical formula.

a)

Coefficient

b)

Subscript

c)

Exponent

d)

Coordinator

89.

How many atoms of oxygen are in

3Fe2O3

a)

6

b)

9

c)

18

d)

2

90.

How many atoms of oxygen are in

3Fe2O3

a)

6

b)

9

c)

18

d)

2

91.

This molecule is a(n) ____________.

a)

nucleic acid

b)

lipid

c)

protein

d)

carbohydrate

92.
Which type of carbohydrate is this?
a)
monsaccharide
b)
disaccharide
c)
polysaccharide
d)
glyceride
93.
What type of carbohydrate is this?
a)
polysaccharide
b)
disaccharide
c)
monosaccharide
d)
it isn't a carbohydrate
94.

Which organic compound is expressed in this diagram? The "R" stands for an amino group opening.

a)

Carbohydrate

b)

Protein

c)

Lipid

d)

Nucleic Acid

95.

A substance is found to have the following characteristics:


Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water


In what category would the substance be classified?

a)

acid

b)

base

c)

enzyme

d)

fatty acid

96.

Milk is a very weak acid. What might its pH value be?

a)

6.5

b)

7.8

c)

4.2

d)

12.2

97.
At high temperatures enzyme activity declines because of:
a)
Denaturation
b)
Decreased Kinetic Motion
c)
Increased H-Bonding
d)
Dissociation of Ionic Compounds
98.
Which enzyme is most efficient in a basic solution?
a)
A
b)
B
99.

Electrons involved in bonding between atoms are

a)

positively charged

b)

valence elections

c)

inside the nucleus

d)

closest to the nucleus

100.

What is a double bond?

a)

a bond between two atoms

b)

one pair of electrons shared between two atoms

c)

two pairs of electrons shared between two atoms

d)

two pairs of electrons shared between four atoms

101.

When an atom loses an electron, it becomes a

(think about a magnet)

a)

positive ion

b)

negative ion

c)

neutral ion

d)

neutral atom

102.

When an atom loses an electron, it becomes a

(think about a magnet)

a)

positive ion

b)

negative ion

c)

neutral ion

d)

neutral atom

103.
A positively charged particles is 
a)
an electron
b)
a neutron
c)
a proton
d)
an isotope
104.
Because an atom is neutral, the number of
a)
electrons equals the number of protons
b)
protons equals the number of neutrons
c)
isotopes equals the number of electrons
d)
electrons equals the number of neutrons 
105.
In the periodic table, elements are arranged in order of 
a)
decreasing atomic number
b)
increasing atomic number
c)
increasing number of energy levels
d)
decreasing number of isotopes 
106.
How many  protons would an element with the atomic number of 18 have in its nucleus? 
a)
11
b)
9
c)
18
107.

Which subatomic particle has a negative charge?

a)

Proton

b)

Neutron

c)

Electron

d)

Ion

108.

If an atom gains an electron, it becomes

(think about a magnet)

a)

a negatively charged ion

b)

an isotope

c)

an apple

d)

a positively charged ion

109.

How many valence electrons does oxygen have? (It has 8 protons)

a)

6

b)

5

c)

8

d)

1

110.

How many valence electrons does Neon have? (It has 10 protons)

a)

8

b)

1

c)

7

d)

6

111.

When electrons are shared evenly between atoms

a)

a covalent bond is formed

b)

an ionic bond is formed

c)

rusting happens

d)

Coach Weiss smiles because they are sharing

112.
The number at the bottom of each square on the periodic table is the ...
a)
atomic number
b)
atomic mass
c)
chemical symbol
d)
element name
113.
The number at the top of each square on the periodic table is the ...
a)
atomic number
b)
atomic mass
c)
Chemical Symbol
d)
Element Name
114.

If an element has an Atomic Mass of 12 and has 6 protons, how many neutrons does it have?

a)

12

b)

6

c)

13

d)

24

115.

Electrons involved in chemical bonding.

a)

valence

b)

ionic

c)

covalent

d)

metallic

116.
What does the atomic mass tell you? 
a)
Basically,the number of electrons and protons
b)
The number of neutrons
c)
Basically, the number of protons and neutrons
d)
The number of protons.
117.
What does the C represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
118.
What does 12.011 represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
119.
What does 12.011 represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
120.
These are found on the Periodic Table.
a)
Compounds
b)
Elements
c)
Mixtures
121.
An element is made up of only one kind of _____.
a)
isotope
b)
plastic
c)
atom
d)
metal
122.
Which is an electron?
a)
A
b)
B
c)
C
123.

A _______ is the force that holds atoms together in a compound.

a)

Chemical Formula

b)

Chemical Reaction

c)

Chemical Bond

d)

Synthesis Reaction

124.

According to the Octet Rule, atoms of elements react with each other in order to attain ____ electrons in their outermost energy level or shell.

a)

2

b)

4

c)

8

d)

10

125.

How many valence electrons are shown in the diagram?

a)

16

b)

7

c)

6

d)

2

126.
What do these isotopes of carbon all have in common?
a)
neutrons & mass number
b)
atomic number and neutrons
c)
atomic number and electrons
d)
protons, atomic number, and mass number
127.
What quantities vary between isotopes of an element?
a)
protons, electrons, and atomic mass
b)
protons, electrons, and atomic number
c)
neutrons and electrons
d)
neutrons and atomic mass
128.
which atom has  4 neutrons?
a)
Li-6
b)
Li-7
c)
Li-8
d)
they have the same # of neutrons

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