Wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Unit 1: Biomolecules, water bonds

Total questions: 73

Worksheet time: 1hrs 15mins

Name
Class
Date
1.

What are the four main biological molecules?

4 lines
2.

Which biomolecule is also known as an enzyme?

a)

Lipids

b)

Carbohydrates

c)

Proteins

d)

Nucleic Acids

3.

Carbohydrates are

a)

Starches

b)

Fats

c)

Fibers

d)

DNA

4.

What are two examples of nucleic acid

(a)  

5.

Biomolecule responsible for insulation and energy storage

a)

proteins

b)

carbohydrates

c)

lipids

d)

nucleic acids

6.

What does a chain of amino acids form

a)

lipids

b)

carbohydrates

c)

nucleic acids

d)

proteins

7.

The biomolecule responsible for quick energy

a)

lipids

b)

nucleic acid

c)

carbohydrates

d)

proteins

8.

The biomolecule that plays a major role in genetics

a)

protein

b)

carbohydrates

c)

nucleic acid

d)

lipids

9.

Enzymes produce a specific reaction

a)

True

b)

False

10.

Once an enzyme does it's work, the enzyme is

a)

duplicated

b)

changed

c)

unchanged

d)

destroyed

11.

If you want a reaction to speed up you need an

a)

carbohydrates

b)

nucleic acid

c)

enzyme

d)

heat

12.

The conditions for an enzyme to work need to

a)

normal

b)

specific

c)

variable

d)

any condition

13.

Why do elements bond?

4 lines
14.

What is a valence electron?

4 lines
15.

Ionic bonds are between

a)

metals

b)

hydrogen

c)

nonmetals

d)

carbons

16.

Covalent bonds

a)

share electrons

b)

Take electrons

17.

Positive ion charge is called

a)

cation

b)

onion

c)

anion

d)

pion

18.

Negatively charged ions are called

a)

non-ions

b)

cations

c)

pions

d)

anions

19.

What kind of bond forms when atoms exchange electrons?

a)

covalent

b)

metal

c)

ionic

d)

hydrogen

20.

The octet rule states that most elements wants to have ____ valence electrons.

a)

10

b)

2

c)

8

d)

3

21.

What are 3 types of chemical bonds?

(a)  

22.

Which most directly controls the rate at which food is broken down to release energy?

a)

enzymes

b)

hormones

c)

nucleic acids

d)

vitamins

23.

Some individuals are unable to digest the lactose found in the milk of cows. The digestive systems of these individuals MOST likely lack which?

a)

a lipid that coats lactose molecules

b)

an ability to produce lactose internally

c)

an enzyme that catalyzes lactose breakdown

d)

a tolerance to lactose developed during childhood

24.

Illustration 1 shows sugar that has formed a bond by the action of an enzyme. Illustration 2 shows the enzyme, and Illustration 3 shows the enzyme after the addition of heat.

How does the addition of heat affect the ability of an enzyme to help the sugar molecules form a bond?

a)

Heat allows the sugar molecules to bond more quickly.

b)

Heat provides places on the enzyme for other molecules to bond.

c)

Heat changes the enzyme so that the sugar molecules can no longer bond.

d)

Heat changes the chemical composition of the sugar molecules so they no longer need the enzyme.

25.

Which of the following foods is highest in polysaccharides?

a)

broccoli

b)

potatoes

c)

cheese

d)

fish

26.
This biomolecule is used to make energy for our cells. The simplest is glucose, a monosaccharide.
a)
Carbohydrates
b)
Lipids
c)
Nucleic Acids
d)
Proteins
27.

How many valence electrons does Oxygen (O) have?

a)

6

b)

8

c)

15

d)

16

28.

Which statement best describes the relationship between atoms & molecules.

a)

molecules are made of atoms that are chemically bonded together.

b)

atoms are made of molecules that are chemically bonded together.

c)

molecules are made of a mixture of atoms and compounds.

d)

atoms are made of protons, neutrons & electrons.

29.
Freezing point of water is
a)
100 degrees Celsius
b)
0 degrees Celcius
c)
0 degrees Fahrenheit
30.
Melting Point of water is
a)
100 degrees Celsius
b)
0 degrees Celsius
c)
0 degrees Fahrenheit
31.
Boiling point of water is 
a)
0 degrees Celsius
b)
100 degrees Celsius
32.
Physical change in matter from a gas to a liquid - 
a)
condensation
b)
evaporation
c)
precipitation
33.
Molecules in a gas are
a)
packed tightly
b)
close together but move freely
c)
are spread far apart
34.
Molecules in a solid are
a)
packed tightly
b)
close together but move freely
c)
are spread far apart
35.
Molecules in a liquid are
a)
packed tightly
b)
close together but move freely
c)
are spread far apart. 
36.

Surface tension of water is the cohesive force between water molecule and other molecule.

a)

True

b)

False

37.

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

38.

Water exists in this forms :

a)

Gas

b)

Plasma

c)

Liquid

d)

Solid

39.

The chemical process to separate water into hydrogen atoms and oxygen atom is called _____________________

a)

photosynthesis

b)

electrolysis

c)

electrosynthesis

d)

composition

40.

water is attracted to substances OTHER than water

a)

adhesion

b)

cohesion

c)

nuclear fusion

d)

erosion

41.

water is attracted to water

a)

adhesion

b)

cohesion

c)

nuclear fusion

d)

erosion

42.

the specific amount of heat needed to raise a substance's temperature by one degree Celsius

a)

surface tension

b)

polarity

c)

specific heat

d)

solubility

43.

the ability of a substance (solute) to dissolve into a liquid (solvent)

a)

density

b)

solubility

c)

cohesion

d)

adhesion

44.

True or False: Water is a polar molecule.

a)

True

b)

False

45.

The cohesion of water molecules at the surface of a body of water

a)

adhesion

b)

surface tension

c)

solubility

d)

polarity

46.

The hydrogen end of a water molecule has a _______ charge.

a)

positive

b)

negative

47.

Why does ice float on top of water?

a)

it is less dense than water

b)

it is not soluble

c)

it has a low specific heat

48.

Why does oil float on top of water?

a)

Oil is polar, water is not

b)

Oil is less dense than water

c)

Oil is more dense than water

d)

None of the above

49.
If the different colors represent different elements, what is this structure?
a)
element
b)
allotrope
c)
compound
d)
space alien
50.
What is this?
a)
eyeballs
b)
an oxygen atom
c)
an oxygen molecule
d)
an oxygen compound
51.
These are nobel gases.   They will bond with
a)
oxygen
b)
each other
c)
nothing
d)
anyone they meet
52.
This represents an
a)
the element, Hydrogen
b)
a molecule
c)
a compound
d)
a solar eclipse
53.
True or False:  Atoms can bond to form molecules.
a)
True
b)
False
54.
Choose the correct shape for this molecule:
a)
Trigonal planar
b)
Trigonal pyramidal
c)
Tetrahedral
d)
Linear
55.
 A lone pair is defined as
a)
A pair of bonding electrons
b)
One non-bonding electron
c)
A pair of non-bonding electrons
d)
A pair of electrons on the central atom
56.
Choose the correct shape for this molecule:
a)
Bent
b)
Trigonal pyramidal
c)
Trigonal planar
d)
Linear
57.
Choose the correct shape for this molecule:
a)
Trigonal planar
b)
Trigonal pyramidal
c)
Bent
d)
Tetrahedral
58.
Choose the correct shape for this molecule:
a)
linear
b)
Trigonal pyramidal
c)
Bent
d)
Tetrahedral
59.
Choose the correct shape for this molecule:
a)
linear
b)
Trigonal pyramidal
c)
Bent
d)
Tetrahedral
60.
Choose the correct shape for this molecule:
a)
Bent
b)
Trigonal pyramidal
c)
Tetrahedral
d)
Trigonal planar
61.
Choose the correct shape for this molecule:
a)
Bent
b)
Linear
c)
Tetrahedral
d)
Trigonal pyramidal
62.
What is the measure of a tetrahedral bond angle?
a)
90 Degrees
b)
109.5 Degrees
c)
120 Degrees
d)
180 Degrees
63.
Which of the following molecular shapes would have a bond angle of 180 Degrees?
a)
Bent
b)
Trigonal Planar
c)
Tetrahedral
d)
Linear
64.
The bond angle for a trigonal planar molecule is 
a)
90 Degrees
b)
109.5 Degrees
c)
120 Degrees
d)
180 Degrees
65.

How many unshared pairs of electrons will the central atom of a bent molecule have?

a)

1

b)

2

c)

3

d)

4

66.
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.
67.
How many sugar-phosphate strands exist in each RNA molecule?
a)
4
b)
2
c)
1
d)
None
68.
This diagram shows the molecular structure of glucose.

Simple sugars like glucose can be used to make larger organic molecules. Identify a larger molecule made from simple sugars.
a)
Carbohydrates
b)
Lipids
c)
Monosaccharides
d)
Amino Acids
69.
The molecule in the diagram plays what role in the body?
a)
Releasing Energy
b)
Forming part of the sugar-phosphate backbone of DNA
c)
Storing Fat
d)
Controlling blood glucose levels
70.
The monomers used to synthesize proteins are called ____________.
a)
Nucleotides
b)
Fatty Acids
c)
Amino Acids
d)
Sugars
71.
The four most common elements found in biomolecules are:
a)
Carbon, Nitrogen, Phosphorus, Bromine
b)
Sulfur, Nitrogen, Iron, Carbon
c)
Sulfur, Phosphorus, Carbon, Oxygen 
d)
Carbon, Oxygen, Nitrogen, Hydrogen
72.

Which of the following is a characteristic of carbohydrates?

a)

Provides structure for cells

b)

Provides energy for all cellular activities

c)

Contain complex carbohydrates known as starches

d)

All of the above

73.

Many land plants store energy in starch. When energy is needed, the starch molecules can be broken down quickly. This chemical reaction produces which of the following?

a)

amino acids

b)

lipids

c)

monosaccharides

d)

RNA chains

Similar Resources on Wayground

Mills: Cell Structure & Function

72 questions

Mills: Cell Structure & Function

quiz

Worksheet

•

9th Grade - University

Biology Final Exam S1

70 questions

Biology Final Exam S1

quiz

Worksheet

•

12th Grade

Ashman-Anatomy-Test 1

71 questions

Ashman-Anatomy-Test 1

quiz

Worksheet

•

10th - 12th Grade

Higher Human Biology - Unit 1

75 questions

Higher Human Biology - Unit 1

quiz

Worksheet

•

11th - 12th Grade

MISA Practice!

75 questions

MISA Practice!

quiz

Worksheet

•

9th - 12th Grade

Genetics Review Game

68 questions

Genetics Review Game

quiz

Worksheet

•

9th - 12th Grade

AP Bio Unit 4 Review

75 questions

AP Bio Unit 4 Review

quiz

Worksheet

•

9th - 12th Grade

Bio 1 - Unit 6 - Evolution Unit Review

69 questions

Bio 1 - Unit 6 - Evolution Unit Review

quiz

Worksheet

•

9th - 12th Grade