BS 161 MSU - Exam 1 questions with verified answers
_____ are the subunits of nucleic acids, and _____ are the subunits of proteins.
a. Nucleotides; amino acids
b. Nucleotides; amino acids
c. Nucleoli; amino acids
d. Amino acids; nucleic bases
e. Polypeptides; sugars Ans✓✓✓ a. Nucleotides; amino acids
1. Based on the primer on scale and approximation, the length of a ribosome is
approximately ____ orders of magnitude smaller than the length of a eukaryotic
cell and approximately ____ orders of magnitude larger than the length of an
amino acid.
a. 3, 2
b. 100, 10
c. 1, 5
d. 0,1 Ans✓✓✓ a. 3, 2
14C is an isotope of carbon that possesses:
a. 8 protons, 6 neutrons, and 2 electrons.
b. 6 protons, 6 neutrons, and 2 electrons.
c. 6 protons, 8 neutrons, and 6 electrons.
,d. 6 protons, 8 neutrons, and 2 electrons.
e. 6 protons, 2 neutrons, and 6 electrons. Ans✓✓✓ c. 6 protons, 8 neutrons, and
6 electrons.
A major difference between eukaryotic cells and prokaryotic cells is that:
a. neither eukaryotic cells nor prokaryotic cells have a nucleus.
b. both eukaryotic cells and prokaryotic cells have a nucleus.
c. prokaryotic cells have a nucleus and eukaryotic cells do not.
d. eukaryotic cells have a nucleus and prokaryotic cells do not. Ans✓✓✓ d.
eukaryotic cells have a nucleus and prokaryotic cells do not.
A mutation in _____ results in a change in _____ that sometimes produces a(n)
_____ with altered structure and function.
a. protein; RNA; DNA
b. protein; DNA; RNA
c. DNA; RNA; protein
d. RNA; DNA; protein
e. RNA; protein; DNA Ans✓✓✓ c. DNA; RNA; protein
,A pair of atoms joined by a polar covalent bond:
a. has the charge spread evenly across both atoms.
b. mixes well with nonpolar solvents.
c. has a slight positive charge on one atom and a slight negative charge on the
other.
d. is unlikely to form hydrogen bonds with water. Ans✓✓✓ c. has a slight positive
charge on one atom and a slight negative charge on the other.
A pair of shared valence electrons is referred to as a(n):
a. hydrophobic effect
b. ionic bond
c. covalent bond
d. van der Waals interaction
e. hydrogen bond Ans✓✓✓ c. covalent bond
A water molecule contains what type of bond?
a. van der Waals interaction
b. polar covalent
, c. ionic
d. hydrogen Ans✓✓✓ b. polar covalent
A woman's doctor tells her to gargle with salt water. She stirs a tablespoon of salt
into a cup of warm water and watches it dissolve. Why does the salt dissolve in
water?
a. The positive hydrogen atoms in water molecules are attracted to chlorine ions,
and the negative oxygen atoms in water molecules are attracted to sodium ions.
b. The positive hydrogen atoms in water molecules are attracted to sodium ions.
c. The positive hydrogen atoms in water molecules are attracted to chlorine ions.
d. The negative oxygen atoms in water molecules are attracted to sodium ions.
e. The negative oxygen atoms in water molecules are attracted to chlorine ions.
Ans✓✓✓ a. The positive hydrogen atoms in water molecules are attracted to
chlorine ions, and the negative oxygen atoms in water molecules are attracted to
sodium ions.
A young girl is staring at the raindrops running down her window. She notices that
the raindrops remain more or less intact, even as they cascade down the
windowpane. This is a result of:
a. polar covalent bonds between water molecules.
_____ are the subunits of nucleic acids, and _____ are the subunits of proteins.
a. Nucleotides; amino acids
b. Nucleotides; amino acids
c. Nucleoli; amino acids
d. Amino acids; nucleic bases
e. Polypeptides; sugars Ans✓✓✓ a. Nucleotides; amino acids
1. Based on the primer on scale and approximation, the length of a ribosome is
approximately ____ orders of magnitude smaller than the length of a eukaryotic
cell and approximately ____ orders of magnitude larger than the length of an
amino acid.
a. 3, 2
b. 100, 10
c. 1, 5
d. 0,1 Ans✓✓✓ a. 3, 2
14C is an isotope of carbon that possesses:
a. 8 protons, 6 neutrons, and 2 electrons.
b. 6 protons, 6 neutrons, and 2 electrons.
c. 6 protons, 8 neutrons, and 6 electrons.
,d. 6 protons, 8 neutrons, and 2 electrons.
e. 6 protons, 2 neutrons, and 6 electrons. Ans✓✓✓ c. 6 protons, 8 neutrons, and
6 electrons.
A major difference between eukaryotic cells and prokaryotic cells is that:
a. neither eukaryotic cells nor prokaryotic cells have a nucleus.
b. both eukaryotic cells and prokaryotic cells have a nucleus.
c. prokaryotic cells have a nucleus and eukaryotic cells do not.
d. eukaryotic cells have a nucleus and prokaryotic cells do not. Ans✓✓✓ d.
eukaryotic cells have a nucleus and prokaryotic cells do not.
A mutation in _____ results in a change in _____ that sometimes produces a(n)
_____ with altered structure and function.
a. protein; RNA; DNA
b. protein; DNA; RNA
c. DNA; RNA; protein
d. RNA; DNA; protein
e. RNA; protein; DNA Ans✓✓✓ c. DNA; RNA; protein
,A pair of atoms joined by a polar covalent bond:
a. has the charge spread evenly across both atoms.
b. mixes well with nonpolar solvents.
c. has a slight positive charge on one atom and a slight negative charge on the
other.
d. is unlikely to form hydrogen bonds with water. Ans✓✓✓ c. has a slight positive
charge on one atom and a slight negative charge on the other.
A pair of shared valence electrons is referred to as a(n):
a. hydrophobic effect
b. ionic bond
c. covalent bond
d. van der Waals interaction
e. hydrogen bond Ans✓✓✓ c. covalent bond
A water molecule contains what type of bond?
a. van der Waals interaction
b. polar covalent
, c. ionic
d. hydrogen Ans✓✓✓ b. polar covalent
A woman's doctor tells her to gargle with salt water. She stirs a tablespoon of salt
into a cup of warm water and watches it dissolve. Why does the salt dissolve in
water?
a. The positive hydrogen atoms in water molecules are attracted to chlorine ions,
and the negative oxygen atoms in water molecules are attracted to sodium ions.
b. The positive hydrogen atoms in water molecules are attracted to sodium ions.
c. The positive hydrogen atoms in water molecules are attracted to chlorine ions.
d. The negative oxygen atoms in water molecules are attracted to sodium ions.
e. The negative oxygen atoms in water molecules are attracted to chlorine ions.
Ans✓✓✓ a. The positive hydrogen atoms in water molecules are attracted to
chlorine ions, and the negative oxygen atoms in water molecules are attracted to
sodium ions.
A young girl is staring at the raindrops running down her window. She notices that
the raindrops remain more or less intact, even as they cascade down the
windowpane. This is a result of:
a. polar covalent bonds between water molecules.
