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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
all of the above
B
neutrons
C
electrons
D
protons
2) An atom that gains or loses an electron is called a(n)
A
isotope
B
hydrogen bond
C
ion
D
covalent 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
atom
B
molecule
C
cell
D
element
7) All matter is composed of
A
atoms
B
cells
C
neutrons
D
carbon
8) Nonpolar molecules have
A
one positive pole
B
no negative or positive poles
C
one negative pole
D
a negative and positive 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
results in ion formation
B
occurs in covalent bonds
C
only occurs in water
D
only occurs if both atoms are of the same element
11) Which of the following is NOT a macromolecule?
A
nucleic acid
B
carbohydrate
C
water
D
lipid
12) Polysaccharides are
A
fats
B
lipids
C
carbohydrates
D
proteins
13) Long chains of amino acids are found in
A
nucleic acids
B
proteins
C
fats
D
DNA
14) All organic molecules contain which element?
A
oxygen
B
nitrogen
C
carbon
D
hydrogen
15) The two types of nucleic acids are:
A
monosaccharides
B
polysaccharides
C
DNA and RNA
D
lipids and waxes
16) The two strands of the DNA molecule are held together by
A
ionic bonds
B
hydrogen bonds
C
covalent bonds
D
none of the above
17) What does DNA store?
A
fats
B
carbohydrates
C
proteins
D
hereditary information
18) Chemical reactions that occur in cells are called
A
ionic bonding reactions
B
physical reactions
C
exothermic reactions
D
biochemical 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
isotope
B
proton
C
neutron
D
electron
*select an answer for all questions
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