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Biology Midterm Review Units 1-3

Total questions: 78

Worksheet time: 57mins

Name
Class
Date
1.
Where in the cell does cell respiration occur?
a)
chloroplast 
b)
central vacuole 
c)
mitochondria
d)
cell membrane
2.
Jerry wants to perform an experiment but he is unsure on how to set it up. First, Jerry should change how variables should be change?
a)
1
b)
4
c)
7
d)
3
3.
This organic molecule is the main component of biological membranes.....
a)
carbohydrates
b)
lipids 
c)
proteins 
d)
nucleic acids
4.
Enzymes, hemoglobin and maltase are all considered to be which organic molecule?
a)
carbohydrates
b)
proteins
c)
nucleic acids
d)
lipids
5.
All carbohydrates end what letters?...
a)
tes
b)
glu
c)
ase
d)
ose
6.
Which main type of cell is large and complex with membrane bound organelles?
a)
prokaryote
b)
eukaryote
c)
plant
d)
animal
7.
This type of cell is thought to be the first organisms on the Earth...
a)
Prokaryote
b)
Eukaryote
c)
plant
d)
animal
8.
If you place a freshwater cell in a salt water solution, what happens to the cell?
a)
nothing
b)
stays the same
c)
swells
d)
shrinks
9.
Which direction does water move in a hypotonic solution?
a)
water moves out of the cell
b)
solutions moves into the cell
c)
water moves into the cell
d)
solution moves out of the cell
10.
Active transport requires the cell to move materials against the concentration gradient, what molecule is required for this to occur?
a)
ADP
b)
ATP
c)
carbohydrates
d)
lipids
11.
During the winter time many plants lose their leaves, what happens to the process of photosynthesis?
a)
stays the same
b)
decrease
c)
no effect 
d)
increase 
12.
Where in the cell does photosynthesis occur?
a)
chloroplast 
b)
mitochondria 
c)
plasma membrane
d)
none of these 
13.
This type of nutrition occurs when organisms make their own food...
a)
heterotroph
b)
autotroph
c)
consumer
d)
primary consumer
14.
The light dependent reaction of photosynthesis occurs where in the chloroplast?
a)
stomata
b)
stroma
c)
thylakoid 
d)
chloroplast membrane
15.
The Light independent reaction of photosynthesis occurs where in the cell?
a)
stroma
b)
thylakoid 
c)
stomata 
d)
none of these 
16.
This stage of cellular respiration does not require oxygen
a)
Kreb's cycle
b)
glycolysis
c)
ETC
d)
fermentation
17.
Which process generates the most amount of ATP?
a)
aerobic respiration
b)
anaerobic respiration
18.
This molecule stores and transmits our genetic information and remains in the nucleus 
a)
rRNA
b)
trna 
c)
DNA
d)
mRNA
19.
The original cell which gave rise to all other cells in evolution had which three parts?
a)
ribosomes, mitochondria, DNA
b)
nucleus, cell membrane, DNA 
c)
chloroplasts, mitochondria, DNA
d)
ribosomes, membrane, DNA
20.
How do molecules move during facilitated diffusion?
a)
With the concentration gradient, using energy
b)
Against the concentration gradient, without using energy
c)
With the concentration gradient, without using energy
d)
Against the concentration gradient, using energy
21.
Which of the following biomolecules provides energy the quickest?
a)
Lipids
b)
Carbohydrates
c)
Nucleic Acids
d)
Proteins
22.
Which of the following biomolecules contains the most energy?
a)
Lipids
b)
Carbohydrates
c)
Nucleic Acids
d)
Proteins
23.
During osmosis
a)
water moves from high to low concentration
b)
large or oddly shaped molecules move across a cell membrane
c)
water moves when energy is used
d)
proteins are built
24.
Permeable means
a)
things can pass through
b)
the concentration levels are different
c)
it is permanent
d)
things are stuck
25.
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)
Diffusion
c)
Equilibrium
26.
In a solution of water and salt, salt is considered the _______.
a)
solvent
b)
solute
c)
solution
27.
In a scenario, salt is placed into a bowl of water.  What is the solvent?
a)
salt
b)
water
c)
saltwater
28.
HYPO means...
a)
Low
b)
High
c)
Equal
d)
Fat
29.
A student noticed that placing wilted lettuce in a bowl of cool water caused the lettuce to become more crisp and firm. What is the best explanation for his observation?
a)
Water moved into the lettuce cells by active transport.
b)
Water moved into the lettuce cells by osmosis.
c)
Salt moved into the lettuce cells by diffusion.
d)
Water moved out of the lettuce cells by osmosis.
30.
What does “high concentration area” mean?
a)
Spread out
b)
Tightly packed together
c)
Uncrowded
d)
Spacious
31.
 If the volume of a cell increases when it is placed in a solution, that solution is said to be __________ to the cell
a)
 hypertonic
b)
subatomic
c)
 isotonic
d)
 hypotonic 
32.
An animal cell placed in a hypertonic (salty) solution will
a)
Shrink
b)
Swell
c)
Stay the same
33.

If a cell containing 5% salt is placed into a glass of water with 20% salt, the solution is _______ compared to the cell.

a)

hypertonic

b)

hypotonic

c)

isotonic

34.
The cell below is in a _________ solution.
a)
Hypotonic
b)
Hypertonic
c)
Isotonic
35.
The cell below is in a _____________ solution.
a)
Hypertonic
b)
Hypotonic
c)
Isotonic
36.
You put a cell into a solution, the cell grows. Is the solution hypotonic or hypertonic to the cell? 
a)
hypertonic
b)
hypotonic
c)
isotonic
d)
not enough information
37.
What type of solution allows water to enter the plant cell?
a)
hypotonic solution
b)
hypertonic solution
c)
isotonic solution
d)
active transport
38.
An ISOTONIC solution has a(n) ______________ concentration of solute (dissolved stuff) than inside the cell.
a)
lower
b)
equal
c)
higher
39.
A HYPOTONIC solution has a ______________ concentration of solute (dissolved stuff) than inside the cell.
a)
lower
b)
equal
c)
higher
40.
If a cell is placed in a HYPOTONIC solution, water will move _________ of the cell, causing it to ___________.
a)
into, swell
b)
out of, shrivel
c)
in and out of the cell, stay the same
41.
What type of solution is this cell in?
a)
Isotonic
b)
Hypertonic
c)
Hypotonic
d)
diffused
42.
Which biomolecule is this a picture of?*
a)
Protein
b)
Nucleic Acid
c)
Lipid
d)
Carbohydrate
43.
Which biomolecule is this a picture of?
a)
Protein
b)
Nucleic Acid
c)
Lipid
d)
Carbohydrate
44.
All of the following are parts of a nucleotide except?
a)
Phosphate Group
b)
Nitrogen Base
c)
Amino Group
d)
Deoxyribose/Ribose sugar
45.
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.
46.
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 .
47.
Which part of a plant captures the light energy used in photosynthesis?
a)
guard cells
b)
chlorophyll
c)
roots
48.

Negatively charged particles found outside of the nucleus of an atom are called ______.

a)

protons

b)

neutrons

c)

electrons

49.

Positively charged particles found in the nucleus of an atom

a)

Neutron

b)

Proton

c)

Electron

50.

A neutral particle found in the nucleus of an atom

a)

neutron

b)

proton

c)

electron

51.

How many protons are in carbon?

a)

12

b)

6

c)

0

d)

7

52.

Calculate the number of neutrons for potassium.

a)

20

b)

19

c)

39

d)

58

53.

The atomic number of an element is equal to the number of

a)

protons and electrons

b)

protons

c)

electrons

d)

electrons and neutrons

54.

The number of protons is equal to the number of electrons.

a)

True

b)

False

55.

Protons + __________ = atomic mass

a)

electrons

b)

neutrons

c)

neither

56.

An atom of carbon has 6 protons and 7 neutrons in its nucleus. If the atom is neutral, how many electrons does it have?

a)

0

b)

7

c)

6

d)

13

57.

A certain atom of oxygen contains 8 protons, 8 neutrons, & 8 electrons. Another atom of unknown identity contains 9 protons. Which of the following MUST be true about this unidentified atom?

a)

It has 9 neutrons in its nucleus.

b)

It is an isotope of oxygen.

c)

Its atomic mass is a decimal number.

d)

It cannot be an atom of oxygen.

58.

What type of bond is formed when atoms share electrons?

a)

Covalent

b)

Ionic

c)

Hydrogen

d)

Polyatomic

59.

How are ionic and covalent bonds alike?

a)

They both form organic molecules.

b)

They both fill outer electron shells.

c)

They both transfer electrons from one atom to another.

d)

They both transfer protons from one atom to another.

60.

A substance with a pH of 8 is a

a)

acid

b)

base

c)

neutral

61.

Carbon has 4 valence electrons which means

a)

it can only form bonds with carbon

b)

it is stable

c)

it can make ionic bonds

d)

it wants to make 4 covalent bonds

62.

The electrons in the outermost energy level are called

a)

valence

b)

ions

c)

covalent

d)

farthest out

63.

This reaction is showing energy being _____________

a)

Absorbed

b)

Released

c)

There is no change in energy shown

64.

Activation energy is

a)

The energy to start a car

b)

The energy needed to break down CO2

c)

The energy needed to start a reaction

d)

The energy used to digest food

65.

An example of a carbohydrate would be

a)

meat

b)

milk

c)

eggs

d)

bread

66.

Which of the following would be considered most acidic?

a)

1

b)

3

c)

7

d)

13

67.

The image shows the periodic grid for SODIUM. What is Sodium's atomic mass?

a)

11

b)

12

c)

23

d)

Impossible to tell

68.
What two elements make up water?
a)
Helium and oxygen
b)
Hydrogen and oxygen
c)
helium and carbon
d)
oxygen and carbon
69.

A substance that changes the rate of a chemical reaction without being used up in the reaction is called a ________________.

a)

bond

b)

catalyst

c)

acid

d)

ion

70.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
71.
Attractions between the negative Oxygen atom of one water molecule and the positive Hydrogen atom of another water molecule are called
a)
Covalent bonds
b)
Ionic bonds
c)
Polar bonds
d)
Hydrogen bonds
72.
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.
73.
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
74.
Water is a universal solvent because it...
a)
It can be found anywhere
b)
It freezes when it gets cold
c)
floats when frozen
d)
Dissolves most substances
75.
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
76.
 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
77.
Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature. What is the reason for this phenomenon?
a)
Water is an acid.
b)
Water is a versatile solvent.
c)
Water has a high heat capacity.
d)
 Water acts as a buffer.
78.
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

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