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Unit 1 and 2 Review

Total questions: 60

Worksheet time: 36mins

Name
Class
Date
1.
What two elements make up water?
a)
Helium and oxygen
b)
Hydrogen and oxygen
c)
helium and carbon
d)
oxygen and carbon
2.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
3.
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.
4.
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
5.
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.
6.
 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
7.
The tightness across the surface of water that enables paper clips to float is ____________.
a)
adhesion
b)
capillary action
c)
surface tension
d)
polarity
8.
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
9.
When a molecule has an opposite electrical charge on each end, it is known as what?
a)
cohesion
b)
polar molecule
c)
hydrogen bond
d)
solution
10.
When water molecules stick easily to other water molecules, this is called what?
a)
cohesion
b)
adhesion
c)
solution
d)
polar molecule
11.
A _____ is something in the environment that causes an organism to respond.
a)
stimulus
b)
response
c)
cause
d)
effect
12.
When a baby kitten becomes an adult cat, this is an example of...
a)
energy metabolism
b)
growth and development
c)
response to stimuli
d)
having cells
13.

Maintaining a stable internal

environment is called

a)

homeostasis

b)

equilibrium

c)

balance

d)

evenness

14.
A reaction to a stimulus is a ______________.
a)
hiccup
b)
response
c)
metabolism
d)
homeostasis
15.

Identify the characteristic: A camel has eyelashes that work to keep the dust and sand out of its eyes.

a)

All living things adapt/respond to their environment

b)

All living things grow

c)

All living things have cells

d)

All living things use energy

16.

Which of the following shows the levels of organization in order from simple to complex?

a)

1. Cell

2. Tissue

3. Organ

4. Organ System

5. Organism

b)

1. Cell

2. Tissue

3. Organelle

4. Organ

5. Organ System

c)

1. Tissue

2. Organelle

3. Cell

4. Organ

5. Organism

d)

1. Organ

2. Tissue

3. Cell

4. Organism

5. Organ System

17.

Cells combine to form...

a)

tissue

b)

organs

c)

organ systems

d)

organisms

18.

Which level of organization is the smallest and simplest?

a)

Cell

b)

Tissue

c)

Organ

d)

Organ System

e)

Organisms

19.

This picture represents which of the levels of organization?

a)

tissue

b)

organism

c)

organ

d)

organ system

20.

Cell Membrane

a)

maintains homeostasis by controlling what enters and leaves the cell

b)

suspends the organelles and provides an environment for chemical reactions within the cell

c)

makes proteins

d)

provides structure for cells and movement of organelles

21.

Cytoplasm

a)

maintains homeostasis by controlling what enters and leaves the cell

b)

suspends the organelles and provides an environment for chemical reactions within the cell

c)

makes proteins

d)

provides structure for cells and movement of organelles

22.

Ribosome

a)

maintains homeostasis by controlling what enters and leaves the cell

b)

suspends the organelles and provides an environment for chemical reactions within the cell

c)

makes proteins

d)

provides structure for cells and movement of organelles

23.

Nucleus

a)

stores genetic information (DNA)

b)

makes and transports proteins

c)

makes lipids and membranes (also detoxifies and stores calcium)

d)

modifies, sorts, and ships proteins

24.

Rough Endoplasmic Reticulum

a)

stores genetic information (DNA)

b)

makes and transports proteins

c)

makes lipids and membranes (also detoxifies and stores calcium)

d)

modifies, sorts, and ships proteins

25.

Smooth Endoplasmic Reticulum

a)

stores genetic information (DNA)

b)

makes and transports proteins

c)

makes lipids and membranes (also detoxifies and stores calcium)

d)

modifies, sorts, and ships proteins

26.

Lysosome

a)

creates energy (ATP) from food; site of cellular respiration

b)

stores food, water, or wastes with the cell; plant cells have a special vacuole

c)

uses enzymes to digest bacteria, viruses, and old organelles (old cell parts are recycled)

d)

create special structures called spindle fibers that are used in cell division

27.

Chloroplast

a)

provides shape, structure, and protection for the cell

b)

site of photosynthesis; uses the sun's energy to produce food

c)

stores water in order to maintain plant shape (if a plant needs water, it wilts)

d)

site of cellular respiration

28.

Cell Wall

a)

provides shape, structure, and protection for the cell

b)

site of photosynthesis; uses the sun's energy to produce food

c)

stores water in order to maintain plant shape (if a plant needs water, it wilts)

d)

site of cellular respiration

29.
Bean-shaped organelle that supplies energy to the cell and has its own ribosomes and DNA. 
a)
mitochondria
b)
nucleus
c)
cell wall 
d)
smooth endoplasmic reticulum 
30.
A rigid structure that gives protection, support, and shape to plants, algae, fungi and some bacteria. 
a)
cell wall
b)
cell membrane 
c)
cytoskeleton 
d)
cytoplasm 
31.

The function of the muscular system is to...

a)

regulate all biological processes in the body

b)

move the body, maintain posture and temperature

c)

remove waste from the body

d)

break down food

32.

What is the function of the excretory system?

a)

move the body

b)

remove waste from the body

c)

break down food

d)

bring in oxygen and remove carbon dioxide

33.

The function of the digestive system is to...

a)

support and protection

b)

deliver oxygen to the cells and remove waste

c)

move the body

d)

break down food

34.

What is the function of the respiratory system?

a)

bring in oxygen and remove carbon dioxide

b)

break down food

c)

helps all parts of the body to communicate with other parts

d)

maintain fluid levels in the body

35.

What is the function of the skeletal system?

a)

break down food

b)

helps all parts of the body to communicate with other parts

c)

maintain fluid levels in body

d)

support and protection

36.

The function of the circulatory systems is to...

a)

deliver oxygen to the cells and remove waste from the cells

b)

break down food

c)

support and protection

d)

move the body

37.

What is made up of atoms?

a)

Only living things

b)

Only non-living things

c)

Everything

d)

None of the above

38.

Select the subatomic particles that are found in the nucleus of an atom

a)

protons

b)

electrons

c)

neutrons

d)

none of the above

39.

What is the charge on a proton?

a)

positive

b)

negative

c)

neutral

40.

What is the charge on an electron?

a)

positive

b)

negative

c)

neutral

41.

In this process water is added to break apart a polymer

a)

Dehydration synthesis

b)

Hydrolysis

c)

Hydrogen Bonding

d)

Covalent bonding

42.

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

a)

Carbon has 6 protons

b)

Carbon can only bond with hydrogen

c)

Carbon has 4 valence electrons

d)

Carbon has 6 valence electrons

43.

The image shows which process?

a)

Hydrolysis

b)

Building of a dimer

c)

Photosynthesis

d)

Dehydration Synthesis

44.

Monomers bond to other monomers through this process

a)

Dehydration Synthesis

b)

Hydrolysis

c)

Hydrogen Bonds

d)

Molecule Building

45.

What is the monomer of a carbohydrate?

a)

Disaccharide

b)

Monosaccharide

c)

Glycerol

d)

enzymes

46.

DNA and RNA are examples of...

a)

Carbohydrates

b)

Lipids

c)

Proteins

d)

Nucleic Acids

47.

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.
48.

What is the ratio of carbon to hydrogen to oxygen in carbohydrates?

a)

2:1:2

b)

3:8:3

c)

1:2:1

d)

8:3:8

49.

Pick all of the foods that are an example of proteins.

a)

Beef Jerky

b)

Eggs

c)

Beans

d)

Bagels

50.

Lipids are...

a)

Hydrophobic

b)

Hydrophilic

c)

Found in fats, oils, and waxes

d)

made of glycerol and fatty acids

51.
Lipids are made of... 
a)
C H O
b)
C H O N
c)
C H O N P
d)
C H O N S
52.

Which of the following elements are found in nucleic acids?

a)

CHO

b)

CHON

c)

CHONP

d)

CHOSK

53.

Activation energy

a)

proteins that speed up chemical reactions

b)

Changing substances by breaking and forming bonds (includes hydrolysis and dehydration reactions)

c)

the capacity for doing work

d)

the energy needed to start a chemical reaction

54.

Denature

a)

the region of an enzyme that attaches to a substrate

b)

a change in the shape of a protein (such as an enzyme) that can be caused by changes in temperature or pH (among other things).

c)

substance that can bind to an enzyme and prevent the substrate from properly binding

d)

macromolecules that contain carbon, hydrogen, oxygen, and nitrogen, include enzymes

55.

Letter C...

a)

products

b)

substrate

c)

enzymes

d)

active site

56.

Letter B...

a)

substrate

b)

active site

c)

enzyme

d)

products

57.

Letter D...

a)

enzyme

b)

active site

c)

substrate

d)

products

58.
With what 3 letters do enzymes typically end?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
59.
An enzyme speeds up a reaction by
a)
lowering the activation energy.
b)
raising the activation energy.
c)
releasing energy.
d)
absorbing energy.
60.

Which of the following are macromolecule groups?

a)

Carbohydrates

b)

Lipids

c)

Gases

d)

Liquid

e)

Nucleic Acids

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