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WorksheetsChemistry and Energy of Life
Total questions: 49
Worksheet time: 40mins
Name
Class
Date
1.
What is the smallest unit of life?
a)
Organism
b)
Nucleus
c)
Cell
d)
Tissue
2.
This type of bond is formed when atoms transfer electrons.
a)
ionic
b)
covalent
3.
The electrons found on the outermost energy level of an atom are called ______________ electrons.
a)
Outside
b)
valence
c)
special
d)
hyper
4.
The positively charged particle in the atom is called...
a)
proton
b)
electron
c)
neutron
d)
megatron
5.
Two or more different different atoms combined together is a
a)
element
b)
isotope
c)
suspension
d)
compound
6.
What contains the negative charge in a atom?
a)
Proton
b)
Electron
c)
Neutron
d)
isotope
7.
If an atom loses an electron, it forms a _____ ion.
a)
positive
b)
negative
c)
radioactive
d)
neutral
8.
Which bonding shares electrons
a)
Hydrogen
b)
Covalent
c)
Ionic
d)
Van der Waals
9.
If Carbon has an atomic number of 6. What is the number protons it has?
a)
8
b)
12
c)
7
d)
6
10.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
11.
Hydrogen needs _____ electrons in its valence shell to be stable.
a)
4
b)
6
c)
8
d)
2
12.
What is the use/function of carbohydrates?
a)
transmit genetic information
b)
source of energy
c)
to make proteins
d)
to build body structures
13.
Which of the following are types of carbohydrates?
a)
fats, waxes, and oils
b)
DNA & RNA
c)
sugars & starches
d)
enzymes & hormones
14.
What is the use/function of lipids?
a)
transmit genetic information
b)
make carbohydrates
c)
store energy, insulation
d)
builds DNA
15.
Which of the following are examples of lipids?
a)
DNA & RNA
b)
sugars & starches
c)
fats, oils, waxes
d)
enzymes & antibodies
16.
Which particles are found in an atom's nucleus?
a)
protons, neutrons and electrons
b)
protons and neutrons
c)
protons and electrons
d)
electrons and neutrons
17.
Which of the following is NOT an organic compound?
a)
C6H12O6
b)
H2O
c)
CH4
d)
C2H4O2
18.
When atoms gain or lose electrons they become
a)
Isotopes
b)
Ions
c)
Molecules
d)
Compounds
19.
Why does carbon work so well as the "element of life"?
a)
Small atom
b)
Has only 2 electron shells
c)
Its not acidic
d)
It is able to form 4 covalent bonds
20.
Products are on which side of a chemical reaction?
a)
Right
b)
Left
c)
Both
d)
Neither
21.
Which property of water allows water to resist changes in temperature?
a)
high specific heat
b)
cohesion
c)
adhesion
d)
polarity
22.
Which property of water helps plants to transports water from their roots to their leaves?
a)
high specific heat
b)
cohesion
c)
adhesion
d)
polarity
23.
In this Bohr model of Neon, how many valence electrons (electrons in the last shell) are there?
a)
10
b)
20
c)
8
d)
16
24.
Which are the four most abundant elements in living cells?
a)
carbon, oxygen, nitrogen, sulfur
b)
carbon, oxygen, hydrogen, nitrogen
c)
carbon, oxygen, sulfur, phosphorus
d)
carbon, sulfur, hydrogen, magnesium
25.
Lemurs in Madagascaa store energy when food is scarce. Which macromolecule is used for long-term energy storage?
a)
Carbohydrate
b)
Lipid
c)
Protein
d)
Nucleic Acid
26.
The building block of a macromolecule is called a
a)
polymer
b)
monomer
c)
compound
d)
block
27.
If a lipid has a double bond between carbons on the fatty acid chain. It is known as
a)
saturated fat
b)
unsaturated fat
28.
This picture shows what type of lipid?
a)
unsaturated fat
b)
wax
c)
saturated fat
d)
steroid
29.
What are all of the chemical reactions that occur within an
organism referred to?
organism referred to?
a)
Enzymes
b)
Macromolecules
c)
Metabolism
d)
Activation Energy
30.
REVIEW: A scientist analyzing an unknown substance has determined that it consists of carbon, hydrogen and oxygen. During experimentation, she determines that the substance is soluble in oil but not in water. Which of the following macromolecules is the unknown substance most likely to be?
a)
carbohydrate
b)
nucleic acid
c)
lipid
d)
protein
31.
In a water molecule, shared electrons spend more time around the oxygen atom than the hydrogen atoms. As a result, the oxygen atom is
a)
slightly negative.
b)
very negative.
c)
slightly positive.
d)
very positive.
32.
Describe a chemical reaction.
a)
carbohydrates are polymers
b)
Products yield reactants
c)
Reactants yield products
d)
activation energy
33.
What kind of bond is this: C-C?
a)
Single
b)
Double
c)
Triple
d)
James
34.
What kind of bond is this: C=C?
a)
Single
b)
Double
c)
Triple
d)
James
35.
Illustration
a)
This illustration is of a nucleic acid.
b)
This illustration is of a protein.
c)
This illustration is of a carbohydrate.
d)
This illustration is of a lipid.
36.
How many electrons should Chlorine have around its Lewis dot model?
a)
5
b)
6
c)
7
d)
8
37.
How many electrons should Phosphorus have around its Lewis dot model?
a)
2
b)
4
c)
5
d)
7
38.
Which of the following is an ionic bond?
a)
H3N
b)
CaCl2
c)
NO2
d)
SCl
39.
A fatty acid is unsaturated if it
a)
contains hydrogen
b)
contains carbon--carbon double bonds
c)
contains a carboxyl (acid) group
d)
bonds to a nucleotide
40.
What are the four biological molecules?
a)
proteins, carbohydrates, lipids, nucleic acids
b)
A, T, C, G
c)
water, air, earth, and fire
d)
Joe, Nick, and Kevin Jonas
41.
Which is NOT one of the three types of carbohydrates?
a)
Sugars
b)
Fats
c)
Fibers
d)
Starches
42.
Hydrolysis literally means
a)
To join with water
b)
To split with oil
c)
To split with water
d)
To join with oil.
43.
Also known as simple sugars, these carbohydrate monomers.
a)
lipids
b)
nucleotide
c)
monosaccharide
d)
monomer
44.
What is the building block of life?
a)
Hydrogen
b)
Carbon
c)
Nitrate
d)
Plutonium
45.
When atoms combine, they may gain, lose, or share:
a)
protons
b)
electrons
c)
neutrons
d)
nuclei
46.
Water molecules require a lot of energy to separate one from the others. This gives water a high
a)
density
b)
polarity
c)
solvency
d)
specific heat
47.
The property of water that allows water molecules to stick to another substance is
a)
adhesion
b)
cohesion
c)
density
d)
specific heat
48.
The cell membrane is selectively permeable, which means...
a)
All materials can enter and leave the cell
b)
Certain things can enter while others cannot
c)
The cell manually sorts through all materials
d)
Only certain cells can interact with the cell.
49.
When looking at the cell membrane, where are the lipid heads located?
a)
Floating between bilayer levels
b)
Outer part of the bilayer
c)
Inner part of the bilayer
d)
Located at different parts throughout the bilayer
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