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Biology Semester 1 Exam Review

Total questions: 57

Worksheet time: 29mins

Name
Class
Date
1.
Non-living factor that affects an ecosystem
a)
biotic factor
b)
abiotic factor
c)
food chain 
d)
biome
2.
A collection of organisms that belong to different populations but all live in the same area and interact with one another.
a)
Population
b)
Ecosystem
c)
Community
d)
Ecosphere
3.
Which is an example of a parasitic relationship?
a)
a bee pollinates a flower
b)
a tapeworm takes nutrients from a dog
c)
an orchid lives in a tree but does not harm the tree
4.
In which type of relationship do both species benefit?
a)
parasitism
b)
mutualism
c)
commensalism
5.
Barnacles grow on whales.  Whales give the barnacles a place to live but the barnacles do not help or harm the whale.  Which type of relationship is this?
a)
commensalism
b)
mutualism
c)
parasitiesm
6.
An organism that needs to eat other organisms to obtain energy is known as a:
a)
Autotroph
b)
Producer
c)
Consumer
d)
Mutualist
7.
What does a food web represent?
a)
All connections of energy flow throughout all organisms in a habitat.
b)
The specific ways that mutualism is carried out.
c)
A single pathway or energy flow between organisms. 
d)
How carnivores get their food. 
8.
Examples of a producer
a)
frog
b)
algae
c)
worm
d)
mouse
9.
In the energy pyramid here, which organisms have the most energy available?
a)
Producers
b)
Carnivores
c)
Herbivores
d)
Top Predator
10.
If there is 1000 Kcal available in the producers in trophic level 1, how much energy is available in the herbivores in trophic level 2?
a)
10 Kcal
b)
1 Kcal
c)
100 Kcal
d)
1000 Kcal
11.
Which organism recieves the least amount of energy from the producer?
a)
Owl
b)
Grasshopper
c)
Lilypad
d)
Mouse
12.
The largest group of organisms found in a food web would be:
a)
Primary Consumers
b)
Producers
c)
Decomposers
d)
Tertiary Consumers
13.

What amount of percentage does the energy decrease as it goes up the pyramid?

a)

100%

b)

1000%

c)

10%

d)

1%

14.
What would most likely happen if the rabbit population was removed from the food chain grass —› rabbit —› fox?
a)
their would be more grass
b)
there would be less rabbits
c)
there would be more fox
15.

The nucleus of an atom contains which subatomic particles?

a)

protons and electrons

b)

protons and neutrons

c)

electrons and neutrons

d)

protons, electrons, and neutrons

16.

Which subatomic particle is counted to determine the type of element the atom represents?

a)

proton

b)

neutron

c)

electron

d)

boron

17.

Isotopes of the same element have different ____.

a)

numbers of protons

b)

numbers of neutrons

c)

atomic numbers

d)

numbers of electrons

18.

What type of bond is found BETWEEN water molecules?

a)

hydrogen bonds

b)

ionic bonds

c)

nonpolar covalent bonds

d)

polar covalent bonds

19.

Cohesive force between water molecules and adhesive force between water molecules and other molecules enable this phenomenon __________________ occur.

a)

surface tension

b)

capillary action

c)

float on water

d)

photosynthesis

20.
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
21.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
22.
When water molecules stick easily to other water molecules, this is called what?
a)
cohesion
b)
adhesion
c)
solution
d)
polar molecule
23.
Water beads up on the surface of a penny because of what property?
a)
Adhesion
b)
High Surface Tension
c)
Universal Solvent
d)
Changes in Density
24.
The fact that ice floats on liquid water is due to the fact that water's solid is ___________ than it's liquid form
a)
less polar
b)
more polar
c)
less dense
d)
more dense
25.
The tightness across the surface of water that enables paper clips to float is ____________.
a)
adhesion
b)
capillary action
c)
surface tension
d)
polarity
26.
Which statement explains why water molecules stick together?
a)
both sides are negative
b)
one side has a positive charge and the other side has a negative charge
c)
one side has a negative charge adn the other side has a neutral charge
d)
both sides are positive
27.

Hydrogen bond

a)

weak attraction between two molecules (ex: water to water) that is formed due to positive and negative charges attracting

b)

Strong attraction between two molecules.

c)

Weak attraction between two molecules that is formed due to charges repelling.

d)

Strong attraction due to repelling of charges.

28.

What is a polar covalent bond.

a)

An ionic bond in which electrons are not shared equally.

b)

A covalent bond in which electrons are not shared equally within a molecule

c)

A covalent bond where protons are not shared equally within a molecule

d)

An ionic bond where protons are not shared equally within a water molecule.

29.

Acid

a)

any substance that forms H+ ions in solution (pH less than 7)

b)

Any substance that forms H+ ions in solution (pH greater than 7)

c)

Neutral on the pH system

30.

Base

a)

A substance that is neutral on a pH system

b)

a substance that produces hydroxide ions in solution (pH more than 7)

c)

a substance that produces less hydroxide ions in a solution (pH less than 7)

d)

What you step on in baseball.

31.

Which property of carbon is important in the forming of many types of organic compounds

a)

carbon has 6 electrons

b)

carbon has 6 protons

c)

carbon has 4 valence electrons

d)

carbon can only bond with hydrogen

32.

Because carbon has 4 valence electrons

a)

it can form up to 4 covalent bonds

b)

it can form ionic bonds

c)

it can form only double bonds

d)

it can form covalent bonds with H only

33.

How many covalent bonds does each carbon have in the molecule shown?

a)

4

b)

2

c)

8

d)

6

34.
Proteins are made of monomers called ___________
a)
Nucleotides
b)
Monosaccharides
c)
Amino Acids
d)
Glycerol and fatty acids
35.
The element _______is found in all of the organic compounds.
a)
Iron
b)
Nitrogen
c)
Carbon
d)
Oxygen
36.
DNA and RNA are examples of 
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
37.
Nucleotides are monomers of
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
38.
Monosaccharides are monomers of
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
39.
Waxes, oils and fats are examples of
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
40.
Glycerol and fatty acids are the monomers of
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
41.
The organic compounds that have many structural purposes and are used in many processes within the
cell are called ____________________.
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
42.
What is the function of nucleic acids?
a)
store genetic information
b)
store energy (long-term)
c)
store energy (short-term)
d)
build skin, hair, nails, muscles
43.
What type of macromolecule are enzymes?
a)
Protein
b)
Carbohydrate
c)
Lipid
d)
Nucleic Acid
44.
Which of the following organic compounds is the main source of energy for living things?
a)
carbohydrates
b)
lipids
c)
nucleic acids
d)
proteins
45.
Which macromolecule stores energy, insulates us, and makes up the cell membrane?
a)
lipids
b)
proteins
c)
carbohydrates
d)
nucleic acids
46.
What are the single sugars that are the building blocks of carbohydrates?
a)
monosaccharides
b)
disaccharides
c)
polysaccharides
d)
amino acid
47.
Which of the following decreases the activation energy necessary to initiate the chemical change within the body?
a)
nucleotides
b)
enzymes
c)
amino acids
d)
fatty acids
48.
The graph below shows how the activity of an enzyme changes over a range of pH values. 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 continually increases as pH increases from 5.0 to 9.0
d)
The enzyme’s activity is greater around pH of 8.0 than around pH of 5.0.
49.
The diagram below illustrates a biochemical process that occurs in organisms. What is another name for the substance labeled "catalyst"?
a)
Enzyme
b)
inorganic compound
c)
Hormone
d)
Antibody
50.
The human body maintains a temperature of around 98.6 degrees at all times. Enzymes are involved in almost every chemical reaction in the body. Which of the following describes the connection between these two statements? 
a)
 Enzymes function best at a specific temperature.
b)
The body needs to be warm to prevent hypothermia.
c)
The body is kept relatively warm to prevent too much enzyme action.
d)
 There is no connection between the two statements. 
51.
As food travels through the digestive system, it is exposed to a variety of pH levels. The stomach has a pH of 2 due to the presence of hydrochloride acid (HCl), and the small intestine has a pH ranging from 7 to 9. HCl converts pepsinogen into pepsin, an enzyme that digests proteins in the stomach. Which of the following most likely happens to pepsin as it enters the small intestine?
a)
 It becomes inactive.
b)
It begins to replicate.
c)
 It's shape changes to engulf large proteins.
d)
It's activity increases to digest more proteins.
52.

A is the

a)

substrate

b)

enzyme-substrate complex

c)

products

53.

B is the

a)

substrate

b)

enzyme-substrate complex

c)

products

54.

C is the

a)

substrate

b)

enzyme-substrate complex

c)

products

55.

An enzyme ________ the activation energy needed for a reaction to occur.

a)

decreases

b)

increases

c)

does nothing to

d)

increases then decreases

56.

Which color line represent a reaction with an enzyme present?

a)

Blue

b)

Red

c)

Both

d)

Neither

57.

The enzyme and substrates have

a)

adverse shapes

b)

complementary shapes

c)

contrary shapes

d)

similar shapes

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