Biology 101 test bank

Biology 101
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CHAPTER3
Te stm
B an k
Water and Life
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,Chapter 3 Water
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and Life
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,1. In a single molecule of water, two hydrogen atoms ar
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e bonded to a single oxygen atom by?
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A. hydrogen bonds. m

B. nonpolar covalent bonds. m m

C. polar covalent bonds. m m

D. ionic bonds. m

E. van der Waals interactions.
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2. In a group of water molecules, hydrogen bonds for
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m between?
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A. the oxygen atoms in different water molecules
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B. Two hydrogen atoms in different water molecules
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C. the oxygen atom in one water molecule and
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a hydrogen atom in another water molecule
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D. the hydrogen atoms in a single water molecule
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E. None of the listed responses is Correct
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3. Life on Earth is dependent on all the properties of wat
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er as well as the abundance of water. Which property o
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f water is probably most important for the functioning
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of organisms at the molecular level?
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A. high specific heat m m

B. cohesion and high surface tension m m m m

C. versatility as a solvent m m m


D. expansion upon freezing m m

E. high heat of vaporization
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4. Some substances, such as oil and gasoline, will n
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ot dissolve in water because?
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A. oil and gasoline are organic compounds,
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B. their molecules have no charges or partial charges t
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o which water molecules can adhere
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C. their electrons are so stable that they do not exchang
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e atoms with water molecules
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D. they do not ionize m m m

E. their molecules are so large
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, 5. The partial charges on a water molecule occur becaus
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e of?
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A. widespread ionization m

B. the unequal sharing of electrons between the hydr
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ogen and the oxygen atoms of a water molecule
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C. the high electronegativity of hydrogen
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D. covalent bonding m


E. the achievement of a stable configuration by one atom of
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a bond but not by the other partner
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6. Water molecules have
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than molecules of similar size, such as ammonia and
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methane, reflecting its capacity to absorb large amou
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nts of heat.
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A. less surface tension
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B. a higher boiling point
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C. a lower capacity for forming
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D. lower specific heat hydrogen bonds
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E. a lower melting point
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7. Most of water's unique features (for example, its versa
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tility as a solvent, ability to moderate temperature, and
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cohesive behavior) result from the fact that?
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A. hydrogen is the only element without any neutrons.
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B. oxygen attracts electrons more than hydrogen does.
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C. oxygen has only one stable isotope, but hydrogen ha
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s three.
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D. oxygen has two unfilled electron shells.
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E. More than one of the above is Correct.
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