Molecular Biology Exam queries and
answers graded A+
Which of the following would most likely happen to a cell in a hypotonic solution? -
ANS✅✅nothing
What type of protein secondary structure is characterized as being highly extensible because of its
coiled structure? - ANS✅✅alpha helix
Which amino acid is most likely to be found in the core of a protein? - ANS✅✅Methionine
Who is generally credited with the discovery of cells? - ANS✅✅Hooke
People who have the O blood type possess - ANS✅✅No enzymes capable of attaching galactose or
N-acetylgalactosamine to the end of the oligosaccharide chain on RBC membrane glycolipids
From what is the lipid containing outer envelope surrounding the viral capsid of animal viruses
derived? - ANS✅✅plasma membrane
Sodium dodecyl sulfate is a known denaturant but not a reducing agent. A protein sample is treated
with SDS and is denatured. What is the effect of SDS on any disulfide bridges that may be present in
the protein? - ANS✅✅The disulfide bridges are not broken because SDS does not affect the
disulfide bridges
Enzymes work by - ANS✅✅Lowering the activation energy of a reaction and thus speeding up the
reaction
Which polysaccharide bond cannot be broken by mammalian enzymes that normally digest
polysaccharides - ANS✅✅Beta (1-4) glycosidic linkages
Phospholipids and fatty acids, and their degree of saturation, have far reaching implications for
membrane transport and fluidity. Which of the following is a correct statement? - ANS✅✅A
species in a cold environment will tend to have more double bonds in the fatty acids of their
phospholipids compared to a species in a warm environment
, Metabolic pathways that make available raw materials from which other molecules can be
synthesized and that provide chemical energy required for many cell activities are known as -
ANS✅✅catabolism
Where are hydrophobic interactions most likely to occur? - ANS✅✅The core of a water soluble
protein
You are conducting an experiment by trying to reproduce the work performed in 1891 by Hans
Driesch, a German embryologist. You are working with a fertilized sea urchin egg and allow it to
complete the first cell division after fertilization. You then carefully separate the two cells of the
embryo and allow their development to continue. Based on Driesch's experiment, which result
below would you expect to happen? - ANS✅✅Both cells develop into complete and normal
embryos that are somewhat smaller
Lab results from a protein analysis reveal the protein's complete structure, and that it catalyzes the
breakdown of a larger substrate. Moreover, there are two binding sites (one for the large substrate,
and one for a small regulatory molecule). Which of the following best describes the mechanism by
which this protein works? - ANS✅✅The protein is likely an enzyme that works through allosteric
inhibition
The effect of a competitive inhibitor can be reversed by - ANS✅✅increasing substrate
concentration
The process by which a relatively unspecialized cell becomes highly specialized is called -
ANS✅✅differentiation
Below are four sets of amino acids. All but one set of these amino acids are structurally and
physiologically similar. Identify the set of amino acids, which contains an amino acid that is NOT
structurally and physiologically similar to, the others in its set.
a. Serine, threonine, methionine
b. Arginine, asparagine, glutamine
c. Tyrosine, phenylalanine, histidine
d. Valine, alanine, leucine - ANS✅✅a
answers graded A+
Which of the following would most likely happen to a cell in a hypotonic solution? -
ANS✅✅nothing
What type of protein secondary structure is characterized as being highly extensible because of its
coiled structure? - ANS✅✅alpha helix
Which amino acid is most likely to be found in the core of a protein? - ANS✅✅Methionine
Who is generally credited with the discovery of cells? - ANS✅✅Hooke
People who have the O blood type possess - ANS✅✅No enzymes capable of attaching galactose or
N-acetylgalactosamine to the end of the oligosaccharide chain on RBC membrane glycolipids
From what is the lipid containing outer envelope surrounding the viral capsid of animal viruses
derived? - ANS✅✅plasma membrane
Sodium dodecyl sulfate is a known denaturant but not a reducing agent. A protein sample is treated
with SDS and is denatured. What is the effect of SDS on any disulfide bridges that may be present in
the protein? - ANS✅✅The disulfide bridges are not broken because SDS does not affect the
disulfide bridges
Enzymes work by - ANS✅✅Lowering the activation energy of a reaction and thus speeding up the
reaction
Which polysaccharide bond cannot be broken by mammalian enzymes that normally digest
polysaccharides - ANS✅✅Beta (1-4) glycosidic linkages
Phospholipids and fatty acids, and their degree of saturation, have far reaching implications for
membrane transport and fluidity. Which of the following is a correct statement? - ANS✅✅A
species in a cold environment will tend to have more double bonds in the fatty acids of their
phospholipids compared to a species in a warm environment
, Metabolic pathways that make available raw materials from which other molecules can be
synthesized and that provide chemical energy required for many cell activities are known as -
ANS✅✅catabolism
Where are hydrophobic interactions most likely to occur? - ANS✅✅The core of a water soluble
protein
You are conducting an experiment by trying to reproduce the work performed in 1891 by Hans
Driesch, a German embryologist. You are working with a fertilized sea urchin egg and allow it to
complete the first cell division after fertilization. You then carefully separate the two cells of the
embryo and allow their development to continue. Based on Driesch's experiment, which result
below would you expect to happen? - ANS✅✅Both cells develop into complete and normal
embryos that are somewhat smaller
Lab results from a protein analysis reveal the protein's complete structure, and that it catalyzes the
breakdown of a larger substrate. Moreover, there are two binding sites (one for the large substrate,
and one for a small regulatory molecule). Which of the following best describes the mechanism by
which this protein works? - ANS✅✅The protein is likely an enzyme that works through allosteric
inhibition
The effect of a competitive inhibitor can be reversed by - ANS✅✅increasing substrate
concentration
The process by which a relatively unspecialized cell becomes highly specialized is called -
ANS✅✅differentiation
Below are four sets of amino acids. All but one set of these amino acids are structurally and
physiologically similar. Identify the set of amino acids, which contains an amino acid that is NOT
structurally and physiologically similar to, the others in its set.
a. Serine, threonine, methionine
b. Arginine, asparagine, glutamine
c. Tyrosine, phenylalanine, histidine
d. Valine, alanine, leucine - ANS✅✅a
