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The science of Biology: Small molecule and Chemistry of life.,Life The Science of Biology 11th Edition Sadava Test Bank
Test Bank to
accompany
Life: The Science of Biology, Eleventh Edition
Sadava • Hillis • Heller • Hacker
Chapter 2: Small Molecules and the Chemistry of Life
TEST BANK QUESTIONS
Multiple Choice
1. An atom with _______ has an atomic mass of 14.
a. 14 neutrons
b. 14 electrons
c. 7 neutrons and 7 electrons
d. 7 protons and 7 electrons
e. 6 protons and 8 neutrons
Answer: e
Learning Outcome: 2.1.1.a Describe the structure of an atom. Bloom’s
Level: 3. Applying
2. Which statement about an atom is true?
a. Only protons contribute significantly to the atom’s mass.
b. Only neutrons contribute significantly to the atom’s mass.
c. Only electrons contribute significantly to the atom’s mass.
d. Both protons and neutrons together contribute significantly to the atom’s mass.
e. Both protons and electrons together contribute significantly to the atom’s mass.
Answer: d
Learning Outcome: 2.1.1.a Describe the structure of an atom. Bloom’s
Level: 1. Remembering
3. What is the difference between an atom and an element?
a. An atom is made of protons, electrons, and (most of the time) neutrons; an element is
composed of only one kind of atom.
b. An element is made of protons, electrons, and (most of the time) neutrons; an atom is
composed of only one kind of element.
c. An atom does not contain electrons, whereas an element does.
d. An atom contains protons and electrons, whereas an element contains protons,
electrons, and neutrons.
e. All atoms are the same, whereas elements differ in structure and properties.
Answer: a
,Learning Outcome: 2.1.1.a Describe the structure of an atom. Bloom’s
Level: 2. Understanding
© 2017 Sinauer Associates, Inc.
4. In the history of the discovery of the parts of an atom, the neutron was discovered after
the proton and electron. What property of a neutron made it more difficult than the proton
or electron to discover? a. Diameter
b. Location in the nucleus
c. Mass
d. Lack of charge
e. Presence in isotopes
Answer: d
Learning Outcome: 2.1.2.a Compare and contrast the properties of protons, neutrons, and
electrons.
Bloom’s Level: 3. Applying
5. The number of protons in a neutral atom equals the number of
a. electrons.
b. neutrons.
c. electrons plus neutrons.
d. neutrons minus electrons.
e. isotopes.
Answer: a
Learning Outcome: 2.1.3.a Explain why atoms typically have no overall electrical charge.
Bloom’s Level: 1. Remembering
6. Which of the following statements about the atom is true?
a. There are usually more protons than electrons in an atom because the negative charge
of an electron is larger than the positive charge of a proton.
b. The negative charge of an electron adds mass to an atom without influencing other
properties.
c. In an atom with a neutral charge, the number of electrons is equal to the number of
protons.
d. The number of electrons determines whether an atom of an element is radioactive.
e. The energy level of electrons is higher in shells close to the nucleus of the atom.
Answer: c
Learning Outcome: 2.1.3.a Explain why atoms typically have no overall electrical charge.
Bloom’s Level: 2. Understanding
7. A lithium atom contains three protons. For this atom to remain inert in an electric field,
it must also contain a. three neutrons.
b. three electrons.
c. two neutrons and two electrons.
d. no electrons.
e. no neutrons.
Answer: b
© 2017 Sinauer Associates, Inc.
, Learning Outcome: 2.1.3.a Explain why atoms typically have no overall electrical charge.
Bloom’s Level: 3. Applying
8. Refer to the table below.
Four samples taken from an underground geologic site were analyzed in a chemistry lab.
The table summarizes the elements found in greatest abundance in each sample. Which
sample(s) could have originated from living sources? a. C only
b. A and B
c. B and C
d. A and C
e. B, C, and D
Answer: c
Learning Outcome: 2.1.4.a Compare the elements found in living tissue with elements
found in nonliving matter. Bloom’s Level: 4. Analyzing
9. The six elements most common in organisms are
a. calcium, iron, hydrogen, phosphorus, potassium, and oxygen.
b. water, carbon, hydrogen, nitrogen, sodium, and oxygen.
c. carbon, oxygen, hydrogen, phosphorus, sulfur, and nitrogen.
d. nitrogen, carbon, iron, sulfur, calcium, and hydrogen.
e. phosphorus, helium, carbon, potassium, hydrogen, and oxygen.
Answer: c
Learning Outcome: 2.1.4.a Compare the elements found in living tissue with elements
found in nonliving matter.
Bloom’s Level: 1. Remembering
10. The number of different natural elements found in the universe is closest to a.
18.
b. 54.
c. 86.
d. 94.
e. 146.
Answer: d
Learning
Outcome:
2.1.4.a
Compare the
© 2017 Sinauer Associates, Inc.
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