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Science exam 50 multiple choice, science homework help

QUESTION 1

What drives the global atmospheric circulation?

a.
ocean circulation

b.
radioactive decay of nuclear particles

c.
energy of the Sun

d.
convection cells within the mantle

e.
tides

2 points

QUESTION 2

Weather is defined as the state of the atmosphere with regard to

a.
temperature.

b.
humidity.

c.
pressure.

d.
cloudiness.

e.
all of these are correct.

2 points

QUESTION 3

Which of the following are both sedimentary rocks?

a.
shale and limestone

b.
quartz and marble

c.
sandstone and basalt

d.
quartzite and salt

e.
slate and marble

2 points

QUESTION 4

Which of the following is an example of the law of unintended consequences in action at Lake Victoria, Africa?

a.
clear cutting of old growth pine trees

b.
building jetties on the Lake Victoria shore

c.
introducing the Nile perch

d.
growing algae for a aquaculture

e.
constructing lake-front apartments

2 points

QUESTION 5

Which term refers to the particular way an organism obtains matter and energy?

a.
ecosystem

b.
environment

c.
ecology

d.
ecological niche

e.
habitat

2 points

QUESTION 6

The importance of the ozone layer to Earth’s inhabitants is

a.
protection from ultraviolet rays.

b.
to neutralize the NOx molecules in acid rain.

c.
to prevent acid rain.

d.
to mediate temperatures in the stratosphere.

e.
all of these are correct.

2 points

QUESTION 7

Which of the following is not true about all living things?

a.
They are subject to the laws of thermodynamics.

b.
They are made from more than one cell.

c.
They respond to their environments.

d.
They need energy to live.

e.
They are dependent upon chemical reactions.

2 points

QUESTION 8

“Cold-blooded” is a term that can refer to

a.
insects and spiders.

b.
snakes and crabs.

c.
frogs and turtles.

d.
turtles and lobsters.

e.
all of these are correct.

2 points

QUESTION 9

What is NOT a function of the cell membrane?

a.
reproduction

b.
separates inside from outside

c.
transmits materials outside to inside

d.
protection

e.
isolation

2 points

QUESTION 10

Which pair of organelles transfers energy in cells?

a.
cytoskeleton and nucleus

b.
mitochondria and chloroplasts

c.
chloroplasts and nucleus

d.
cell wall and vacuoles

e.
cell membrane and nucleus

2 points

QUESTION 11

In the process of photosynthesis

a.
electromagnetic radiation is converted to electric and magnetic energy.

b.
electromagnetic radiation is converted to lipids.

c.
light energy is metabolized.

d.
light energy is converted to atomic energy.

e.
light energy is converted to chemical energy.

2 points

QUESTION 12

Which is not an example of a lipid?

a.
candle wax

b.
hair

c.
petroleum jelly

d.
cell membrane

e.
butter

2 points

QUESTION 13

One difference between carbohydrates and proteins is

a.
the carbohydrate molecule lacks nitrogen.

b.
the protein molecule contains more stored energy.

c.
the carbohydrate molecule is in butter.

d.
only the protein molecule contains iron.

e.
only the carbohydrate molecule can form long chains.

2 points

QUESTION 14

What is the cellular function of deoxyribonucleic acid?1) provides structure to the nucleus2) governs all chemical functions3) carries inheritance information4) serves as an antibiotic for bacteria

a.
1

b.
2

c.
3

d.
4

e.
Both 2 and 3

2 points

QUESTION 15

Which statement about viruses is false?

a.
Viruses kill the cell.

b.
Viruses are RNA segments coated with protein.

c.
Viruses can metabolize.

d.
Viruses are DNA segments coated with protein.

e.
Viruses use the cell’s enzymes.

2 points

QUESTION 16

DNA fingerprinting works to identify criminals because

a.
all individuals have the same DNA.

b.
no two individuals, except for identical twins, have the same DNA.

c.
all individuals have unique DNA.

d.
DNA samples are readily available from suspects.

e.
DNA can be used to create a criminal profile.

2 points

QUESTION 17

What is cancer?

a.
a potentially fatal bacterial infection

b.
a disease characterized by rampant cell growth

c.
a genetic defect expressed in bone or tissue

d.
a condition in which cell membranes disintegrate

e.
a disease caused by an injury to the mitochondria

2 points

QUESTION 18

Which of the following is found in a fossil record?

a.
documented changes in a species

b.
all fossils found, catalogued, and analyzed since the early sixteenth century

c.
10,000 unique phyla

d.
more reptiles than insects

e.
all of these are correct

2 points

QUESTION 19

The “primordial soup” of the Miller-Urey experiments contained

a.
a dark brown liquid.

b.
lipids.

c.
amino acids.

d.
fossil fuel

e.
a dark-brown liquid, lipids, and amino acids.

2 points

QUESTION 20

The first cell on Earth was remarkable because it

a.
was quite frugal in using chemical resources.

b.
developed effective defense mechanisms.

c.
probably contained the same essential amino acids of cells today.

d.
required tenacity to seek out the organic molecules it needed to survive and replicate.

e.
all of these are correct

2 points

QUESTION 21

Earth’s surface has about 10% more water now than it didbefore the volcanic outgassing period of Earth’s early history.

True

False

2 points

QUESTION 22

Sedimentary rocks may become metamorphic rocks, but metamorphic rocks never become sediments.

True

False

2 points

QUESTION 23

Volcanic rock and extrusive rock are two names for rocks that aremade when molten material solidifies on the Earth’s surface.

True

False

2 points

QUESTION 24

Chlorofluorocarbons replaced Freon as a coolant in airconditioners and refrigerators.

True

False

2 points

QUESTION 25

The United States did not sign the international Kyoto accord.

True

False

2 points

QUESTION 26

Sugar molecules are the building blocks of cell membranes.

True

False

2 points

QUESTION 27

The cell membrane is made from amino acids.

True

False

2 points

QUESTION 28

Cytoplasm is the fluid that takes up spaces between the organelles of a cell.

True

False

2 points

QUESTION 29

The primary difference between a prokaryote cell and a eukaryote cell is the nuclear membrane in the latter.

True

False

2 points

QUESTION 30

The “unit of inheritance” is the cell.

True

False

2 points

QUESTION 31

Three types of RNA are used in protein assembly.

True

False

2 points

QUESTION 32

Genetic engineering is based in part on the study of how viruses manipulate the cell replication processes.

True

False

2 points

QUESTION 33

Totipotent cells are valuable to research because of their ability to become any tissue.

True

False

2 points

QUESTION 34

The first animal cloned was a fruit fly.

True

False

2 points

QUESTION 35

Farmers understood natural selection concepts before CharlesDarwin ever sailed to the Galapagos Islands.

True

False

2 points

QUESTION 36

Darwin’s Origin of the Species is important because it presents asingle theory that unifies all of biology.

True

False

2 points

QUESTION 37

Virtually all contemporary scientists accept evolution true.

True

False

2 points

QUESTION 38

Natural selection would be impossible without genetic diversity.

True

False

2 points

QUESTION 39

Computer designed drugs will greatly decrease the time andincrease the efficiency of drug research and development.

True

False

2 points

QUESTION 40

Viruses depend upon the host cell mechanisms to reproduce.

True

False

2 points

QUESTION 41

Any change in the DNA is called a/an

2 points

QUESTION 42

An organism that always produces offspring having the same form of a certain trait is said to be

2 points

QUESTION 43

The disease known as AIDS is caused by the virus.

2 points

QUESTION 44

Any structure that helps an animal survive and pass on its genes is called a/an

2 points

QUESTION 45

is the term used to describe the division of one cell into two.

2 points

QUESTION 46

Humans have pairs of chromosomes.

2 points

QUESTION 47

A/an is a molecule that facilitates bonding between two other molecules.

2 points

QUESTION 48

The branch of science that gives names to organisms is

2 points

QUESTION 49

The kingdom that contains multicellular organisms that get their energy and nutrients by eating other organisms is

2 points

QUESTION 50

A/an includes the plants, animals and microorganisms that live in a given area together with their physical surroundings.

2 points

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