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Biochem Test Review

Total questions: 105

Worksheet time: 1hrs 14mins

Name
Class
Date
1.

An ionic bond is formed when

a)

Valence electrons are shared.

b)

Valence electrons surround the cations.

c)

Valence electrons are transferred between atoms.

d)

Valence electrons are completely transferred between two metals.

2.

What is a valence electron?

a)

an electron that is found in the outermost shell of an atom

b)

an electron found in the innermost shell of an atom

c)

an electron found in the middle shell

d)

an electon found in the nucleus

3.

What is the number of valence electrons of Oxygen?

a)

1

b)

2

c)

6

d)

8

4.

How many valence electrons in this structure ?

a)

4

b)

5

c)

6

d)

7

5.

How many electrons are being shared between the two carbon atoms in the compound ethyne?

a)

1

b)

2

c)

3

d)

6

6.
What is the charge on a Hydrogen ion?
a)
+1
b)
1
c)
2
7.
How do covalent bonds form?
a)
Donating & receiving valence e- between atoms.
b)
Opposite slight charges attract each other between compounds.
c)
Scientists are still not sure how they form.
d)
Sharing valence e- between atoms.
8.

An ionic bond is formed when

a)

Valence electrons are shared.

b)

Valence electrons surround the cations.

c)

Valence electrons are transferred between atoms.

d)

Valence electrons are completely transferred between two metals.

9.

When elements form bonds, it changes their ________ properties.

a)

mass

b)

chemical and physical

c)

physical

d)

chemical

10.

The chemical bond formed when two atoms share electrons is call a(n)

a)

covalent bond

b)

ionic bond

c)

metallic bond

d)

electron bond

11.

Which of the following is a similarity between ionic and covalent bonds?

a)

Both include the gaining and losing of electrons

b)

Both include the sharing of electrons

c)

Both make the elements more stable

d)

Both are typically found as solids at room temperature

12.
What do we call a covalent bond where electrons are shared UNEVENLY or UNEQUALLY?
a)
Ionic
b)
Polar Covalent
c)
Nonpolar Covalent
d)

Metallic

13.

What is cohesion?

a)

The ability of a molecule to "stick" to itself

b)

The ability of a molecule to "stick" to other molecules

c)

Large amounts of energy are required to change the temperature of a substance

d)

A well-organized and efficient team

14.

What about the chemical structure of water causes many of the critical properties that support life on Earth?

a)

Hydrogen Bonds

b)

Cohesive behavior

c)

Polarity

d)

Expansion Upon Freezing

15.

What characteristic is shown in the image?

a)

Polarity

b)

Hydrogen Bonds

c)

Cohesion

d)

Adhesion

16.

This individual is ice fishing. They cut through the top layers of ice to reach the water and fish below. What property of water allows for this to happen?

a)

Expansion Upon Freezing

b)

Universal Solvent

c)

Ability to Moderate Temperature

d)

Cohesive Behavior

17.

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

18.

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

19.

Sweating is an example of what property of water?

a)

Ability to Moderate Temperature

b)

Expansion Upon Freezing

c)

Cohesive Behavior

d)

Universal Solvent

20.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
21.
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.
22.
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
23.
The tightness across the surface of water that enables paper clips to float is ____________.
a)
adhesion
b)
capillary action
c)
surface tension
d)
polarity
24.
When water molecules stick easily to other water molecules, this is called what?
a)
cohesion
b)
adhesion
c)
solution
d)
polar molecule
25.

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

a)

Cohesion

b)

Adhesion

c)

Insulation

d)

Ph

26.

The fact that water can stick to other substances is called:

a)

Ph

b)

Adhesion

c)

Cohesion

d)

Insulation

27.
Which biomolecule contains fats, oils, and waxes?
a)
Proteins
b)
Nucleic Acid
c)
Lipids
d)
Carbohydrate
28.
What do monomers do?
a)
Bond to make a polymer
b)
Create essential proteins
c)
Stores energy
d)
Splits to make more cells
29.
The monomer of a protein is called...
a)
an amino acid
b)
a monosaccharide
c)
a fatty acid
d)
a nucleotide
30.

Which organic molecule would a long-distance runner most likely choose to eat two hours before a race?

a)

A protein, because it builds muscle mass.

b)

A lipid because it provides long term energy storage.

c)

A carbohydrate because it releases energy quickly.

d)

A protein, because it transports oxygen into the blood stream.

31.

How are the functions of a carbohydrate and a lipid similar?

a)

Both are a source of energy.

b)

Both are replicated during meiosis.

c)

Both lower the activation energy of reactions.

d)

Both dissolve nutrients in the digestive system.

32.

What are the monomers of a lipid?

a)

fat cubes and glycogen

b)

glycerol and amino acids

c)

fatty acids and glycerol

d)

amino acids

33.

Nucleotides are a monomer of which biomolecule?

a)

Nucleic acids

b)

Proteins

c)

Carbohydrates

d)

Lipids

34.
What elements are common to all 4 biomolecules?
a)
Carbon, hydrogen, nitrogen
b)
Carbon, Nitrogen, Phosphorus
c)
Carbon, Hydrogen, Oxygen
d)
Carbon, Hydrogen, Phosphorus
35.
Which biomolecule contains pastas and breads?
a)
Lipid
b)
Protein
c)
Nucleic Acid
d)
Carbohydrate
36.
Which biomolecule helps form muscles?
a)
Nucleic Acid
b)
Carbohydrate
c)
Protein
d)
Lipids
37.
What is the function of nucleic acids?
a)
Stores energy
b)
Stores genetic information
c)
Movement
d)
Physical structure
38.
Carbon, Hydrogen, Oxygen and Nitrogen are elements in what biomolecule?
a)
Carbohydrate
b)
Lipid
c)
Protein
d)
Nucleic acid
39.

Which biomolecules can be DNA and RNA?

a)

Carbohydrates

b)

Lipids

c)

Proteins

d)

Nucleic Acids

40.
Which biomolecule is also known as enzymes?
a)
Carbohydrate
b)
Lipid
c)
Nucleic Acid
d)
Protein
41.

Which organic molecules is paired with its function?

a)

nucleic acid- to store energy

b)

lipids – to regulate metabolic.

c)

protein- to provide insulation.

d)

carbohydrates – to provide quick-release energy.

42.
What biomolecule do enzymes belong to? 
a)
Carbohydrate
b)
Lipid
c)
Nucleic Acid
d)
Protein
43.

Which biomolecule makes up cell membranes?

a)

Protein

b)

Carbohydrate

c)

Lipid

d)

Nucleic acid

44.
Enzymes catalyze reactions by ___________ Activation Energy.
a)
Increasing
b)
Decreasing
45.

Which of the following contains the most lipid?

a)
b)
c)
d)
46.

Below are the four biomolecules, EXCEPT:

a)

Protein

b)

Lard

c)

Carbohydrates

d)

Nucleic Acid

47.

What type of biomolecule contains carbon, hydrogen, oxygen, and nitrogen?

a)

carbohydrate

b)

lipid

c)

nucleic acid

d)

protein

48.

Which of the following is the correct pair of biomolecules and their monomers?

a)

Carbohydrate: Fatty Acids

b)

Protein: Amino acid

c)

Lipid: Nucleotide

d)

Nucleic Acid: DNA

49.

The following statements are TRUE regarding lipids, EXCEPT:

a)

they store energy for later use

b)

they are insoluble in water

c)

they are composed of carbon, hydrogen, oxygen and phosphorus

d)

they can be found in fats and oils

50.

Which of the following is a monosaccharide?

a)

Chitin

b)

Sucrose

c)

Starch

d)

Glucose

51.

Cholesterol is a/an...

a)

carbohydrate

b)

lipid

c)

protein

d)

nucleic acid

52.

Which of the following transfers the genetic information for the creation of proteins

from the nucleus to the ribosomes?

a)

DNA

b)

RNA

c)

nucleotide

d)

enzyme

53.

The sugar in RNA is _____________while the sugar in DNA is ________.

a)

deoxyribose, ribose

b)

ribose, deoxyribose

c)

c. ribose, phosphate

d)

ribose, uracil

54.

Which of the following sugars are the components of lactose?

a)

glucose & galactose

b)

fructose and galactose

c)

glucose and glucose

d)

glucose & fructose

55.

Which of the following elements is present in Nucleic acid but not in other biomolecules?

a)

Carbon

b)

Phosphorus

c)

Nitrogen

d)

Hydrogen

56.
Which biomolecule is responsible for insulation and energy storage?
a)
Protein
b)
Nucleic Acid
c)
Lipid
d)
Carbohydrate
57.
Which biomolecule is your main source of energy?
a)
Nucleic Acid
b)
Protein
c)
Lipid
d)
Carbohydrate
58.
Building blocks of polymers.
a)
monomer
b)
polypeptide
c)
monosaccharide
d)
glycerol
59.

What do enzymes do?

a)

Build things up or break them down

b)

Help filter waste from the body

c)

Create environments where food can be eaten

d)

Add and remove water

60.

Which category of macromolecules do enzymes belong to?

a)

Carbohydrates

b)

Proteins

c)

Fats/Lipids

61.

Enzymes are specific. This means that an enzyme only works with molecules that are....

a)

the right size and shape

b)

broken down already

c)

present in water

d)

too big for the body to handle

62.

In the diagram, what is letter A?

a)

product

b)

enzyme-substrate complex

c)

substrate

d)

active site

63.

Letter D...

a)

enzyme

b)

active site

c)

substrate

d)

products

64.

Letter B...

a)

substrate

b)

active site

c)

enzyme

d)

products

65.

Letter C...

a)

products

b)

substrate

c)

enzymes

d)

active site

66.

Letter E...

a)

active site

b)

products

c)

substrate

d)

enzyme

67.

An enzyme speeds up a reaction by

a)

raising the activation energy

b)

lowering the activation energy

c)

releasing energy

d)

absorbing energy.

68.

What happens to an enzyme when it is denatured?

a)

Activation energy is lowered

b)

It becomes stronger

c)

It loses its shape

d)

Activation energy is raised

69.
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
70.
Each enzyme only has 1 substrate that will fit its active site.  What is this called?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
71.
What 3 letters do enzymes typically end in?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
72.
Any substance that is acted upon by an enzyme is called a(n)?
a)
Coenzyme
b)
Substrate
c)
Vitamin
d)
Polypeptide
73.
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
74.
In a chemical reaction, bonds are broken and new bonds are formed that create new substances. The bonds that are broken are called what?
a)
Reactants
b)
Products
c)
Atoms
d)
Catalysts
75.
Enzymes provide a site where reactants called substrates can be brought together in an enzyme-catalyzed reaction. The site is called the
a)
enzyme substrate complex.
b)
reaction site.
c)
active site.
d)
lock and key.
76.
Chemical reactions always involve
a)
the breaking of bonds in reactants.
b)
the formation of new bonds in products.
c)
the breaking of bonds in reactants and the formation of new bonds in products.
d)
enzymes. 
77.
Based on the graph, what is the optimal temperature for this enzyme? 
a)
15oC
b)
40oC
c)
30oC
d)
35oC
78.

Changes in pH and temperature can ___________________ an enzyme which causes it to lose its shape and affects its function.

a)

puncture

b)

denature

c)

double

d)

delete

79.

On the pH scale, an acid is a compound that produces a solution with a pH (a)   7.

80.

On the pH scale, a base is a compound that produces a solution with a pH (a)   7.

81.

What pH does a neutral substance have?

a)

5

b)

6

c)

7

d)

8

82.

Which of the following is the weakest acid?

a)

bananas (pH 5)

b)

tomatoes (pH 4)

c)

cheese (pH 6)

d)

orange juice (pH 3)

83.

What is pH a measure of?

a)

Density

b)

Mass

c)

Hydrogen Ion Concentraion

d)

Polarity

84.

Which of the following pH values represents the greatest concentration of -OH ions?

a)

3

b)

6

c)

9

d)

1

85.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
86.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
87.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
88.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
89.
a)
Element
b)
Compound
c)
Mixture
90.
a)
Element
b)
Compound
c)
Mixture
91.
a)
Element
b)
Compound
c)
Mixture
92.
a)
Element
b)
Compound
c)
Mixture
93.
a)
Element
b)
Compound
c)
Mixture
94.

A pure substance that cannot be broken down into any other substance.

a)

Elements

b)

Compounds

c)

Mixtures

95.

Fe is the ___________________ for iron

a)

Letters

b)

Chemical Symbol

c)

Equation

96.

A(n) ______________ is formed when two or more elements chemically combine.

a)

Compound

b)

Element

c)

Mixture

97.

A ___________ is a combination of many different elements not chemically combined.

a)

Element

b)

Compound

c)

Mixture

98.
Which subatomic particle has a positive (+) charge?
a)
Neutron
b)
Proton
c)
Electron
99.
True or False - Protons and Neutrons have about the same mass.
a)
True - They have about the same mass
b)
False - They do not have about the same mass
100.
Which subatomic particle has a negative (-) charge?
a)
Proton
b)
Electron
c)
Neutron
101.
Which subatomic particle has a neutral or no charge?
a)
Proton
b)
Electron
c)
Neutron
102.
Which two subatomic particles make up the nucleus of an atom?
a)
Protons and Electrons
b)
Neutrons and Electrons
c)
Electrons and Protons
d)
Protons and Neutrons
103.
Where are the Electrons found in the structure of an atom?
a)
In the nucleus
b)
In spaces around the nucleus
104.
How many electron shells/levels does this atom have?
a)
1
b)
2
c)
3
d)
4
105.
How many protons does this atom have?
a)
3
b)
6
c)
4
d)
2

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