BIOC 3110 Exam 1 Solved Papers -
Questions with Complete Solutions
The central dogma of molecular biology teaches us that
a. DNA replicates itself and RNA is translated into protein
b. RNA is typically the genetic material
c. RNA contains information, which is translated into amino
acid sequences
d. Proteins are not needed to replicate DNA or transcribe RNA
e. RNA is made of the same monomers as DNA - Correct
Answers ✅c. RNA contains information, which is translated
into amino acid sequences
Cell membranes are
a. Aqueous partitions to keep the outside out and the inside
in
b. Entirely greasy bilayers that allow proteins to be localized
to particular
compartments
c. Composed of amphipathic molecules with hydrophilic
surfaces facing outside and
inside
d. Found objects assembled by membranase
e. Polymers of alternating carbohydrate and lipid monomers -
Correct Answers ✅c. Composed of amphipathic molecules
with hydrophilic surfaces facing outside and
,BIOC 3110 Exam 1 Solved Papers -
Questions with Complete Solutions
inside
Hydrogen bonds are
a. Weak associations in which protons are donated from a
polar group to a
hydrophobic group
b. Irreversible associations in which hydronium maximizes its
entropy
c. Found in fluid water but not in DNA base pairs
d. Donated, for example, from the C-alpha carbon of an
amino acid to the carbonyl
oxygen of another amino acid
e. Donated, for example, from the amide proton of an amino
acid to the carbonyl
oxygen of another amino acid - Correct Answers ✅e.
Donated, for example, from the amide proton of an amino
acid to the carbonyl
oxygen of another amino acid
At pH 4
a. There are 4000 hydronium molecules per liter of solution
b. There are 1000 times more hydronium molecules per liter
than at neutral pH
,BIOC 3110 Exam 1 Solved Papers -
Questions with Complete Solutions
c. There are 3 times more hydronium molecules per liter than
at neutral pH
d. There are 1000 times more hydroxide ions per liter than at
neutral pH
e. There are 4 times fewer hydroxide ions per liter than at
neutral pH - Correct Answers ✅b. There are 1000 times
more hydronium molecules per liter than at neutral pH
At neutral pH, tyrosine has
a. A protonated amino group, a deprotonated alcohol group
and a deprotonated
carboxylic acid group
b. A deprotonated amino group, a deprotonated alcohol group
and a protonated
carboxylic acid group
c. A net charge of -1
d. A net charge of zero
e. A net charge of +1 - Correct Answers ✅d. A net charge
of zero
The missing amino acid in the series Gly, _____, Ser is
a. Met, because all have sulfur
b. Ala, because it is a size series
, BIOC 3110 Exam 1 Solved Papers -
Questions with Complete Solutions
c. Asn, because the amino acids are carboxamides
d. Lys, because they are the positively charged amino acids
e. Arg, because they are the carbohydrate group of amino
acids - Correct Answers ✅b. Ala, because it is a size series
Alpha helices
a. Are the gene-rich regions of DNA
b. Are always double stranded
c. Have their side chains on the inside
d. Are glycine and proline-rich
e. Have 3.6 amino acid residues per turn - Correct Answers
✅e. Have 3.6 amino acid residues per turn
Beta sheets have all of the properties below EXCEPT
a. The property of twisting rather than lying in a flat plane
b. Strands that can run either parallel or anti-parallel
c. Location of side chains on alternating sides of the strand
d. Regular patterns of backbone hydrogen bonding between
residues in the same strand
e. Excluding proline from most positions - Correct Answers
✅d. Regular patterns of backbone hydrogen bonding
between residues in the same strand
Questions with Complete Solutions
The central dogma of molecular biology teaches us that
a. DNA replicates itself and RNA is translated into protein
b. RNA is typically the genetic material
c. RNA contains information, which is translated into amino
acid sequences
d. Proteins are not needed to replicate DNA or transcribe RNA
e. RNA is made of the same monomers as DNA - Correct
Answers ✅c. RNA contains information, which is translated
into amino acid sequences
Cell membranes are
a. Aqueous partitions to keep the outside out and the inside
in
b. Entirely greasy bilayers that allow proteins to be localized
to particular
compartments
c. Composed of amphipathic molecules with hydrophilic
surfaces facing outside and
inside
d. Found objects assembled by membranase
e. Polymers of alternating carbohydrate and lipid monomers -
Correct Answers ✅c. Composed of amphipathic molecules
with hydrophilic surfaces facing outside and
,BIOC 3110 Exam 1 Solved Papers -
Questions with Complete Solutions
inside
Hydrogen bonds are
a. Weak associations in which protons are donated from a
polar group to a
hydrophobic group
b. Irreversible associations in which hydronium maximizes its
entropy
c. Found in fluid water but not in DNA base pairs
d. Donated, for example, from the C-alpha carbon of an
amino acid to the carbonyl
oxygen of another amino acid
e. Donated, for example, from the amide proton of an amino
acid to the carbonyl
oxygen of another amino acid - Correct Answers ✅e.
Donated, for example, from the amide proton of an amino
acid to the carbonyl
oxygen of another amino acid
At pH 4
a. There are 4000 hydronium molecules per liter of solution
b. There are 1000 times more hydronium molecules per liter
than at neutral pH
,BIOC 3110 Exam 1 Solved Papers -
Questions with Complete Solutions
c. There are 3 times more hydronium molecules per liter than
at neutral pH
d. There are 1000 times more hydroxide ions per liter than at
neutral pH
e. There are 4 times fewer hydroxide ions per liter than at
neutral pH - Correct Answers ✅b. There are 1000 times
more hydronium molecules per liter than at neutral pH
At neutral pH, tyrosine has
a. A protonated amino group, a deprotonated alcohol group
and a deprotonated
carboxylic acid group
b. A deprotonated amino group, a deprotonated alcohol group
and a protonated
carboxylic acid group
c. A net charge of -1
d. A net charge of zero
e. A net charge of +1 - Correct Answers ✅d. A net charge
of zero
The missing amino acid in the series Gly, _____, Ser is
a. Met, because all have sulfur
b. Ala, because it is a size series
, BIOC 3110 Exam 1 Solved Papers -
Questions with Complete Solutions
c. Asn, because the amino acids are carboxamides
d. Lys, because they are the positively charged amino acids
e. Arg, because they are the carbohydrate group of amino
acids - Correct Answers ✅b. Ala, because it is a size series
Alpha helices
a. Are the gene-rich regions of DNA
b. Are always double stranded
c. Have their side chains on the inside
d. Are glycine and proline-rich
e. Have 3.6 amino acid residues per turn - Correct Answers
✅e. Have 3.6 amino acid residues per turn
Beta sheets have all of the properties below EXCEPT
a. The property of twisting rather than lying in a flat plane
b. Strands that can run either parallel or anti-parallel
c. Location of side chains on alternating sides of the strand
d. Regular patterns of backbone hydrogen bonding between
residues in the same strand
e. Excluding proline from most positions - Correct Answers
✅d. Regular patterns of backbone hydrogen bonding
between residues in the same strand
