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Chapter 2
Test Description: Chapter 2 Review
Instructions: Answer all questions to get your test result.
1) Atoms are made up of
A
protons
B
all of the above
C
electrons
D
neutrons
2) An atom that gains or loses an electron is called a(n)
A
covalent bond
B
isotope
C
ion
D
hydrogen bond
3) Atoms always have a positive charge
A
False
B
True
4) Adhesion is the attraction between different substances
A
True
B
False
5) Water molecules attract nonpolar molecules such as oil.
A
False
B
True
6) A substance that is composed of only one type of atom is called a(n)
A
molecule
B
element
C
atom
D
cell
7) All matter is composed of
A
carbon
B
neutrons
C
atoms
D
cells
8) Nonpolar molecules have
A
no negative or positive poles
B
one positive pole
C
a negative and positive pole
D
one negative pole
9) Due to polarity, substances that dissolve best in water contain
A
both b and c
B
nonpolar bonds
C
polar bonds
D
ionic bonds
10) Sharing of electrons in the outer energy levels of two atoms
A
only occurs if both atoms are of the same element
B
occurs in covalent bonds
C
only occurs in water
D
results in ion formation
11) Which of the following is NOT a macromolecule?
A
water
B
lipid
C
nucleic acid
D
carbohydrate
12) Polysaccharides are
A
proteins
B
fats
C
lipids
D
carbohydrates
13) Long chains of amino acids are found in
A
proteins
B
fats
C
nucleic acids
D
DNA
14) All organic molecules contain which element?
A
oxygen
B
nitrogen
C
hydrogen
D
carbon
15) The two types of nucleic acids are:
A
DNA and RNA
B
polysaccharides
C
monosaccharides
D
lipids and waxes
16) The two strands of the DNA molecule are held together by
A
none of the above
B
hydrogen bonds
C
ionic bonds
D
covalent bonds
17) What does DNA store?
A
fats
B
carbohydrates
C
hereditary information
D
proteins
18) Chemical reactions that occur in cells are called
A
exothermic reactions
B
physical reactions
C
biochemical reactions
D
ionic bonding reactions
19) Water molecules attract nonpolar molecules such as oil.
A
True
B
False
20) The negatively charged particle of an atom is called the
A
proton
B
electron
C
isotope
D
neutron
*select an answer for all questions
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