Chapter 2 Question Preview (ID: 47691)
Chapter 2 Review.
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Atoms are made up of
a) protons
b) neutrons
c) electrons
d) all of the above
An atom that gains or loses an electron is called a(n)
a) ion
b) isotope
c) covalent bond
d) hydrogen bond
Atoms always have a positive charge
a) True
b) False
c)
d)
Adhesion is the attraction between different substances
a) True
b) False
c)
d)
Water molecules attract nonpolar molecules such as oil.
a) True
b) False
c)
d)
A substance that is composed of only one type of atom is called a(n)
a) atom
b) cell
c) element
d) molecule
All matter is composed of
a) cells
b) neutrons
c) carbon
d) atoms
Nonpolar molecules have
a) one negative pole
b) one positive pole
c) a negative and positive pole
d) no negative or positive poles
Due to polarity, substances that dissolve best in water contain
a) nonpolar bonds
b) ionic bonds
c) polar bonds
d) both b and c
Sharing of electrons in the outer energy levels of two atoms
a) results in ion formation
b) occurs in covalent bonds
c) only occurs if both atoms are of the same element
d) only occurs in water
Which of the following is NOT a macromolecule?
a) lipid
b) nucleic acid
c) water
d) carbohydrate
Polysaccharides are
a) carbohydrates
b) lipids
c) fats
d) proteins
Long chains of amino acids are found in
a) fats
b) proteins
c) nucleic acids
d) DNA
All organic molecules contain which element?
a) oxygen
b) hydrogen
c) nitrogen
d) carbon
The two types of nucleic acids are:
a) lipids and waxes
b) DNA and RNA
c) polysaccharides
d) monosaccharides
The two strands of the DNA molecule are held together by
a) ionic bonds
b) covalent bonds
c) hydrogen bonds
d) none of the above
What does DNA store?
a) hereditary information
b) fats
c) carbohydrates
d) proteins
Chemical reactions that occur in cells are called
a) biochemical reactions
b) ionic bonding reactions
c) physical reactions
d) exothermic reactions
Water molecules attract nonpolar molecules such as oil.
a) True
b) False
c)
d)
The negatively charged particle of an atom is called the
a) proton
b) electron
c) neutron
d) isotope
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