BIL 150 - Mallery Practice test 1 || 100% CORRECT
ANSWERS
The tertiary level of 3D protein structure is stabilized by
a) ester bonds only
b) hydrogen bonds only
c) interaction with the molecular environment
d) glycosidic bonds
e) none of these is correct correct answers c) interaction with the molecular environment
Which one of these chemical bonds is planar?
a) C-C
b) peptide bond
c) glycosidic bond
d) hydrogen bond
e) ionic bond correct answers b) peptide bond
in the figure the protein structure depicted by the letter D can be best described as which of
the following?
a) an alpha helix
b) a quaternary structure
c) a beta sheet
d) the enzyme's substrate
e) none of these is correct correct answers c) a beta sheet
protein that has the same catalytic reactivity as another protein, but has a different amino acid
sequence is referred to as a(n)
a) homologous protein
b) contractile protein
c) ubiquitin
d) polymorphic protein
e) none of these is correct correct answers d) polymorphic protein
the 3D shape most often seen in proteins, especially enzymes, is
a) linear
b) globular
c) tetrahedral
d) fibrous
e) helical correct answers b) globular
A protein fingerprint produced by 2 dimensional gel electrophoresis involves which of the
following techniques?
a) gel filtration and affinity chromatography
, b) ion exchange and gel filtration chromatography
c) isoelectric focusing & SDS electrophoresis
d) affinity chromatography & isoelectric focusing
e) none of these is correct correct answers c) isoelectric focusing & SDS electrophoresis
a 20,000g centrifugation spin that results in pelleting of mitochondria and small organelles is
done by
a) differential centrifugation
b) affinity chromatography
c) isoelectric focusing
d) 2D electrophoresis correct answers a) differential centrifugation
The pH where there is no net charge on an ionizable molecule is known as its
a) zwitterion
b) ionization point (pK)
c) isoelectric point
d) D-optical isomer
e) none of these is correct correct answers c) isoelectric point
the movement of water to the top of very tall trees is due to which of the following properties
of the water molecules
a) its specific heat
b) its heat of fusion
c) its heat of vaporization
d) its surface tension
e) none of these is correct correct answers d) its surface tension
e) none of these is correct
which of the following substances is characteristic of "all" phospholipid molecules, but is not
found in ordinary triglycerides (triacylglycerol)?
a) glycerol
b) fatty acids
c) inorganic phosphate
d) ester bonds
e) all of the above correct answers c) inorganic phosphate
suppose that the pH within a cell's nucleus is 6.25 and the pH within its cytoplasm is 7.25.
choose the correct statement
a) the nucleus has a greater number of OH ions than the cytoplasm
b) the cytoplasm is more basic than the nucleus
c) the concentration of [H+] is greater in the cytoplasm
d) the nucleus is more basic than cytoplasm
e) none of these is correct correct answers b) the cytoplasm is more basic than the nucleus
"glycosidic bond" is to "monosaccharide" as "____" is to "amino acid"
ANSWERS
The tertiary level of 3D protein structure is stabilized by
a) ester bonds only
b) hydrogen bonds only
c) interaction with the molecular environment
d) glycosidic bonds
e) none of these is correct correct answers c) interaction with the molecular environment
Which one of these chemical bonds is planar?
a) C-C
b) peptide bond
c) glycosidic bond
d) hydrogen bond
e) ionic bond correct answers b) peptide bond
in the figure the protein structure depicted by the letter D can be best described as which of
the following?
a) an alpha helix
b) a quaternary structure
c) a beta sheet
d) the enzyme's substrate
e) none of these is correct correct answers c) a beta sheet
protein that has the same catalytic reactivity as another protein, but has a different amino acid
sequence is referred to as a(n)
a) homologous protein
b) contractile protein
c) ubiquitin
d) polymorphic protein
e) none of these is correct correct answers d) polymorphic protein
the 3D shape most often seen in proteins, especially enzymes, is
a) linear
b) globular
c) tetrahedral
d) fibrous
e) helical correct answers b) globular
A protein fingerprint produced by 2 dimensional gel electrophoresis involves which of the
following techniques?
a) gel filtration and affinity chromatography
, b) ion exchange and gel filtration chromatography
c) isoelectric focusing & SDS electrophoresis
d) affinity chromatography & isoelectric focusing
e) none of these is correct correct answers c) isoelectric focusing & SDS electrophoresis
a 20,000g centrifugation spin that results in pelleting of mitochondria and small organelles is
done by
a) differential centrifugation
b) affinity chromatography
c) isoelectric focusing
d) 2D electrophoresis correct answers a) differential centrifugation
The pH where there is no net charge on an ionizable molecule is known as its
a) zwitterion
b) ionization point (pK)
c) isoelectric point
d) D-optical isomer
e) none of these is correct correct answers c) isoelectric point
the movement of water to the top of very tall trees is due to which of the following properties
of the water molecules
a) its specific heat
b) its heat of fusion
c) its heat of vaporization
d) its surface tension
e) none of these is correct correct answers d) its surface tension
e) none of these is correct
which of the following substances is characteristic of "all" phospholipid molecules, but is not
found in ordinary triglycerides (triacylglycerol)?
a) glycerol
b) fatty acids
c) inorganic phosphate
d) ester bonds
e) all of the above correct answers c) inorganic phosphate
suppose that the pH within a cell's nucleus is 6.25 and the pH within its cytoplasm is 7.25.
choose the correct statement
a) the nucleus has a greater number of OH ions than the cytoplasm
b) the cytoplasm is more basic than the nucleus
c) the concentration of [H+] is greater in the cytoplasm
d) the nucleus is more basic than cytoplasm
e) none of these is correct correct answers b) the cytoplasm is more basic than the nucleus
"glycosidic bond" is to "monosaccharide" as "____" is to "amino acid"
