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SBI4U - Biochemistry

Total questions: 85

Worksheet time: 1hrs 7mins

Name
Class
Date
1.
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
2.
Proteins are composed of what smaller building blocks?
a)
amino acids
b)
nucleic acids
c)
fatty acids
d)
nucleotides
3.
Proteins are composed of what smaller building blocks?
a)
amino acids
b)
nucleic acids
c)
fatty acids
d)
nucleotides
4.
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
5.
The primary purpose the body uses monosaccharides for is?
a)
Building muscles
b)
Helping the Immune System
c)
Immediate Energy
d)
Generating Heat
6.
Building blocks of polymers.
a)
monomer
b)
polypeptide
c)
monosaccharide
d)
glycerol
7.
Based on the graph, what temperature does this enzyme work best? 
a)
15 C
b)
40 C
c)
30 C
8.
Attractions between water molecules are called
a)
Covalent bonds
b)
Ionic bonds
c)
Polar bonds
d)
Hydrogen bonds
9.
Based on the graph, what temperature does this enzyme work best? 
a)
15 C
b)
40 C
c)
30 C
10.
Also known as simple sugars, these are the monomers of carbohydrates.
a)
lipids
b)
nucleotide
c)
monosaccharide
d)
monomer
11.
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
12.
True of False. Glycogen is a starch that is found in animals. 
a)
True
b)
False
13.
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.
14.
Water is classified as an inorganic compound because it
a)
does not contain carbon
b)
does not contain nitrogen
c)
contains hydrogen
d)
contains oxygen
15.
Vegetable oils, such as corn oil, belong to which general class of organic substances?
a)
lipids
b)
proteins
c)
carbohydrates
d)
salts
16.
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
17.
The elements: C H O N typically represent what proportion of an organism's element make up?
a)
78%
b)
68%
c)
96%
d)
82%
18.
Atoms that have the same number of protons but differ in the amount of neutrons are called:
a)
Ions
b)
Isotopes
c)
Noble Gases
d)
Actinides
19.
Atoms that have gained or lost electrons are called:
a)
Ions
b)
Isotopes
c)
Isomers
d)
Neutrinos
20.
The number of protons in a nucleus is given by the:
a)
Atomic Number
b)
Atomic Mass
c)
Electronegativity
d)
Group Number
21.
How many valence electrons are in Phosphorus?
a)
1
b)
5
c)
3
d)
9
22.
For the quickest source of energy if going for a run, you should eat a food that contains a high percentage of 
a)
sodium
b)
protein
c)
fats
d)
carbohydrates
23.

Changes in temperature and pH can decrease an enzyme’s activity by breaking

a)

peptide bonds

b)

hydrogen bonds

c)

amino acids

d)

sulfur bonds

24.
What happens to the speed of a chemical reaction when a catalyst is present?
a)
It becomes erratic.
b)
It stays the same.
c)
It speeds up.
d)
It slows down.
25.
What is the term for the amount of energy that needs to be added for a chemical reaction to start?
a)
bond energy
b)
chemical energy
c)
activation energy
d)
reactant energy
26.
Letter C...
a)
active site
b)
enzymes
c)
substrate
d)
products
27.
Letter D...
a)
active site
b)
enzyme
c)
substrate
d)
products
28.
What happens when enzymes are heated to a high temperature?
a)
The enzymes die.
b)
The shapes of the enzyme are altered or denatured
c)
The enzymes' amino acid sequence changes.
d)
The enzymes remain the same
29.
Which of the following binds to the active site of an enzyme? 
a)
substrate
b)
product
c)
codon
d)
none of the above
30.
Identify the biomolecule
a)
Lipid
b)
Protein
c)
Carbohydrate
d)
Nucleic Acid
31.
Enzymes are _________ that __________ chemical reactions.
a)
proteins, slow down
b)
proteins, speed up
c)
lipids, slow down
d)
lipids, speed up
32.
The property where water molecules are attracted to other water molecules.
a)
adhesion
b)
capillary action
c)
cohesion
d)
universal solvent
33.
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
34.
Which of the following is LEAST likely to dissolve in water?
a)
nonpolar fats and oils
b)
polar sugar molecules
c)
salt made of a positive sodium ion and a negative chloride ion
d)
all of the substances will dissolve easily in water
35.
Base your answers on the graph and your knowledge of biology.
Neither enzyme works at a pH of
a)
1
b)
5
c)
3
d)
13
36.
In the reaction illustrated in the diagram below, which structure represents the enzyme?
a)
A
b)
B
c)
C
d)
D
37.
Vegetable oils, such as corn oil, belong to which general class of organic substances?
a)
lipids
b)
proteins
c)
carbohydrates
d)
salts
38.
Amino acids are the building blocks of which class of macromolecules?
a)
proteins
b)
lipids
c)
carbohydrates
d)
nucleotides
39.
The process used to split polymers; this is done by adding water
a)
Dehydration
b)
Hydrolysis
c)
Enzomatic
d)
Tetratonic
40.
Which of the following is an organic compound?
a)
H2O
b)
C6H12O6
c)
NH2
d)
OH
41.

The bond that joins two amino acids together

a)

double bond

b)

hydrogen bond

c)

ionic bond

d)

peptide bond

42.
Two examples of carbohydrates are
a)
fatty acids and glycerol
b)
fats and waxes
c)
sugars and starches
d)
amino acids and alcohol
43.
Why can some insects walk on water?
a)
The water sticks to the insect.
b)
The insect is too light to break the surface tension.
c)
The insect has hydrophobic oils on its legs.
d)
Insects can't walk on water.
44.
The property where water can pull itself up tubes or through spaces in paper or fabrics.
a)
adhesion
b)
capillary action
c)
cohesion
d)
universal solvent
45.

Define plasma membrane

a)

lipid that helps minimize effects of temperature

b)

only on the outer surface of the plasma membrane and are attached to proteins or lipids; form distinctive cellular markers

c)

flexible boundary of a cell that separates a cell from its surroundings

d)

may extend partway into the plasma membrane, cross the membrane entirely, or be loosely attached to its inside or outside face

46.

Which type of biological macromolecule is the main component of the plasma membrane?

a)

carbohydrate

b)

lipid

c)

protein

d)

nucleic acid

47.

This image is an example of a phospholipid. Which part of a phospholipid is HYDROPHOBIC?

a)

the phosphate "head"

b)

the lipid "tails"

48.

This image is an example of a phospholipid. Which part of a phospholipid is HYDROPHILIC?

a)

the phosphate "head"

b)

the lipid "tails"

49.

Where can carbohydrates be found when part of a plasma membrane?

a)

On the outside of the membrane

b)

On the inside of the membrane

c)

Embedded part of the way into the membrane

d)

Embedded the whole way through the membrane

e)

All of the above

50.

Where can PROTEINS be found when part of a plasma membrane?

a)

On the outside of the membrane

b)

On the inside of the membrane

c)

Embedded part of the way into the membrane

d)

Embedded the whole way through the membrane

e)

All of the above

51.

What is the function of cholesterol in a plasma membrane?

a)

To make the membrane flexible

b)

To control the effect of temperature changes

c)

To attract water molecules

d)

To allow nutrients and other essential molecules into the cell

52.

What is the "big idea" of the fluid mosaic model of plasma membranes?

a)

the plasma membrane creates a specialized FLUID that looks like a MOSAIC.

b)

the plasma membrane is a MOSAIC.

c)

the fluid mosaic model is NOT related to the plasma membrane.

d)

a plasma membrane is a MOSAIC of components that move FREELY and FLUIDLY.

53.

What does "hydrophobic" mean?

a)

water loving, associates with water

b)

water fearing, does not associate with water

c)

a world war II submarine

d)

an example would be solutes like sugar or salt

54.

What does "hydrophilic" mean?

a)

water loving, associates with water

b)

water fearing, does not associate with water

c)

a world war II submarine

d)

an example would be solutes like oil or fat

55.
When particles move from areas of high concentration to areas less concentrated, this has taken place.
a)
diffusion
b)
mitosis
c)
endocytosis
d)
photosynthesis
56.
What process occurs when WATER diffuses across a membrane?
a)
endocytosis
b)
mitosis
c)
osmosis
d)
nuclear fission 
57.
Why is diffusion and osmosis important to cells?
a)
It allows them to take in materials without using energy.
b)
It allows them to reproduce.
c)
It allows them to absorb sunlight.
d)
It allows cells to use all energy.
58.
When both inside and outside of a cell have the same amount of water it is said that the cell has reached a state of ___________.
a)
osmosis
b)
equilibrium
c)
diffusion
d)
hypertonic
59.
The picture below is an example of _________________.
a)
osmosis
b)
isotonic
c)
diffusion
d)
active transport
60.

The diffusion of particles through the cell membrane from high to low concentration is called ....

a)

exocytosis

b)

active transport

c)

passive transport

d)

osmosis

61.

What forms the channels and pumps in the phospholipid bilayer?

a)

carbohydrates

b)

proteins

c)

hydrophilic heads

d)

lipids

62.
Describes the arrangement of the cell membrane as bendable and made of many parts. 
a)
The Fluid Mosaic Model 
b)
The Major Mobility Model 
c)
The Crazy Cell Model
d)
The Maze Model
63.

___________ form the two layers of the cell membrane.

a)

Carbohydrates

b)

Sugars

c)

Phospholipids

d)

Cholesterol

64.

What will happen to the cell in the hypotonic solution?

a)

Swell up

b)

Shrink

c)

Stay the same

65.

The concentration of red molecules outside the cell is higher than the concentration inside the cell. The red molecules cannot penetrate the cell. The cell is inside a ______.

a)

hypotonic solution

b)

hypertonic solution

66.

The membrane does not allow the green molecules to pass through it. What will happen next?

a)

Water will flow into side A.

b)

Water will flow into side B.

c)

Water will stay still.

67.

Which Type of solution is the middle cell placed in?

a)

Hypertonic

b)

Hypotonic

c)

Isotonic

d)

Robotonic

68.

What would happen to a cell placed in a hypertonic solution

a)

The cell would shrink

b)

The cell would expand and possibly burst

c)

The cell would remain the same

d)

The cell would dance and do the Nay Nay!

69.

What are the two types of cell transport?

a)

Passive and Active

b)

Active and Facilitated

c)

Passive and Facilitated

d)

None of the above

70.

Which describes an isotonic environment?

a)

Too much water in the cell will cause the cell to burst - the percentage of water is higher outside the cell than inside the cell

b)

Too little water in the cell will cause the cell to shrink - the percentage of water is lower outside the cell than inside the cell

c)

Concentrations of water are equal inside and outside the cell

71.

The movement of materials that requires energy is called...

a)

active transport

b)

passive transport

c)

massive transport

d)

proactive transport

72.

A process in which cells surround and engulf substances that are TOO BIG to enter the cell is known as...

a)

Pinocytosis

b)

Phagocytosis

c)

Endocytosis

d)

Receptor-mediated

73.

When a cell forms a vesicle around unwanted particles and expels it OUT of the cell.

a)

Pinocytosis

b)

Endocytosis

c)

Receptor-mediated

d)

Exocytosis

74.

What is a functional group?

a)

Group of atoms that give specific characteristics to a molecule

b)

Group of molecules that give specific characteristics to an atom

c)

Group of molecules that make up a group of atoms

d)

Group of atoms that give specific characteristics to an element

75.

What functional group is -HC=O

a)

Carbonyl Aldehyde

b)

Carbonyl Ketone

c)

Carboxyl

d)

Methyl

76.

What functional group is -OH

a)

Hydroxyl

b)

Carboxyl

c)

Amino

d)

Carbonyl Ketone

77.

What functional group(s) is/are present on the molecule? (check all that apply)

a)

Hydroxyl

b)

Carboxyl

c)

Methyl

d)

Carbonyl Aldehyde

78.

Classify the compound based on the functional group present.

a)

ketone

b)

ester

c)

carboxylic acid

79.

Classify the compound based on the functional group present.

a)

alkane

b)

alkene

c)

alkyne

80.
Classify the compound based on the functional group present.
a)
aldehyde
b)
ketone
c)
alcohol
d)
carboxylic acid
81.

Carboxylic acids combined with alcohols in high temperature will form a(n)

a)

ester

b)

alcohol

c)

amine

82.

Name the compound based on the functional group present.

a)

methanol

b)

aldehyde

c)

ethanol

83.
Classify the compound based on the functional group present.
a)
alkane
b)
alkene
c)
alkyne
d)
aromatic
84.
Classify the compound based on the functional group present.
a)
alcohol
b)
ketone
c)
ester
d)
ether
85.
Classify the compound based on the functional group present.
a)
alcohol
b)
ketone
c)
ester
d)
ether

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