BIOLOGY 180 UPDATED EXAM SCRIPT QUESTIONS AND
ANSWERS RATED A+
✔✔The interaction between two non-polar molecules involves the following: -
✔✔Induced dipole attraction to an induced dipole.
✔✔In which of the following shells would an electron have the lowest potential energy? -
✔✔1
✔✔Sodium has an atomic number of 11. How many valence electrons are there in Na?
- ✔✔1
✔✔Neutrons are _______________ electrons. - ✔✔heavier than
✔✔After which checkpoint is the cell first committed to continue the cell cycle through
M? - ✔✔G1
✔✔Which of the following is a protein maintained at constant levels throughout the cell
cycle that requires cyclin to become catalytically active? - ✔✔CDK
✔✔The centromere is a region in which: - ✔✔Chromatids remain attached to one
another until anaphase.
✔✔Kinase - ✔✔*Action of this enzyme leads to a conformational shift in substrate which
usually activates the protein substrate's enzymatic function.
*Transfers a phosphate from ATP to substrate generating ADP and a phosphorylated
substrate.
✔✔Phosphatase - ✔✔*Removes phosphate from substrate generating inorganic
phosphate (Pi) and dephosphorylated substrate.
*Usually this enzyme's action will lead to Inactivation of protein substrates.
✔✔A major group of G protein-linked receptors contain seven transmembrane alpha
helices. The amino terminus of the protein lies at the exterior of the plasma membrane.
Loops of amino acids connect the helices either at the exterior face or on the cytosol
face of the membrane. The loop on the cytosol side between helices 5 and 6 is usually
substantially longer than the others. Where would you expect to find the carboxyl
terminus? - ✔✔at the cytosol surface
✔✔Which of the following processes would be utilized to release insulin from the beta
cells of the pancreas? - ✔✔Exocytosis
, ✔✔An organism that needs only CO2 from the air as a carbon source is called a/an: -
✔✔Autohgraph
✔✔Mitochondria and chloroplasts are similar in that - ✔✔They are both found in all
plants.
They both contain their own DNA.
✔✔When a membrane is freeze-fractured, the bilayer splits down the middle between
the two layers of phospholipids. In an electron micrograph of a freeze-fractured
membrane, the bumps seen on the fractured surface of the membrane are: - ✔✔Integral
proteins
✔✔Which of the following monolayers is called a cytosolic leaflet? - ✔✔Outer layer of
the organellular membrane.
✔✔_________________ structure is the assembly of two or more protein subunits into
a functional protein. - ✔✔Quaternary
✔✔Alpha helices and beta sheets are associated with which level of protein
organization? - ✔✔Secondary structure
✔✔The 5' end of a nucleic acid is considered the
________(head). It is characterized by the presence of
a________(phosphate)functional group. While the 3' end is considered
the________(tail). It is characterized by the presence of a________(hydroxyl)functional
group. - ✔✔nucleic acid
✔✔Grouping of the lipids together because: - ✔✔They all share the same property of
being hydrophobic
✔✔What is the bond between two simple sugars called? - ✔✔A glycosidic linkage
✔✔Which functional group is found in both alcohols and carbohydrates? - ✔✔Hydroxyl
✔✔Which of the following would not have a real impact on variation in carbon
skeletons? - ✔✔Isotopes of carbon in the chain
✔✔Which of the following produces ATP? - ✔✔Cyclic electron flow
Non-cyclic electron flow
✔✔The reaction centers in photosystem I and II get their names from the wavelength of
light that is optimally needed to excite their electrons. Which of the following statements
ANSWERS RATED A+
✔✔The interaction between two non-polar molecules involves the following: -
✔✔Induced dipole attraction to an induced dipole.
✔✔In which of the following shells would an electron have the lowest potential energy? -
✔✔1
✔✔Sodium has an atomic number of 11. How many valence electrons are there in Na?
- ✔✔1
✔✔Neutrons are _______________ electrons. - ✔✔heavier than
✔✔After which checkpoint is the cell first committed to continue the cell cycle through
M? - ✔✔G1
✔✔Which of the following is a protein maintained at constant levels throughout the cell
cycle that requires cyclin to become catalytically active? - ✔✔CDK
✔✔The centromere is a region in which: - ✔✔Chromatids remain attached to one
another until anaphase.
✔✔Kinase - ✔✔*Action of this enzyme leads to a conformational shift in substrate which
usually activates the protein substrate's enzymatic function.
*Transfers a phosphate from ATP to substrate generating ADP and a phosphorylated
substrate.
✔✔Phosphatase - ✔✔*Removes phosphate from substrate generating inorganic
phosphate (Pi) and dephosphorylated substrate.
*Usually this enzyme's action will lead to Inactivation of protein substrates.
✔✔A major group of G protein-linked receptors contain seven transmembrane alpha
helices. The amino terminus of the protein lies at the exterior of the plasma membrane.
Loops of amino acids connect the helices either at the exterior face or on the cytosol
face of the membrane. The loop on the cytosol side between helices 5 and 6 is usually
substantially longer than the others. Where would you expect to find the carboxyl
terminus? - ✔✔at the cytosol surface
✔✔Which of the following processes would be utilized to release insulin from the beta
cells of the pancreas? - ✔✔Exocytosis
, ✔✔An organism that needs only CO2 from the air as a carbon source is called a/an: -
✔✔Autohgraph
✔✔Mitochondria and chloroplasts are similar in that - ✔✔They are both found in all
plants.
They both contain their own DNA.
✔✔When a membrane is freeze-fractured, the bilayer splits down the middle between
the two layers of phospholipids. In an electron micrograph of a freeze-fractured
membrane, the bumps seen on the fractured surface of the membrane are: - ✔✔Integral
proteins
✔✔Which of the following monolayers is called a cytosolic leaflet? - ✔✔Outer layer of
the organellular membrane.
✔✔_________________ structure is the assembly of two or more protein subunits into
a functional protein. - ✔✔Quaternary
✔✔Alpha helices and beta sheets are associated with which level of protein
organization? - ✔✔Secondary structure
✔✔The 5' end of a nucleic acid is considered the
________(head). It is characterized by the presence of
a________(phosphate)functional group. While the 3' end is considered
the________(tail). It is characterized by the presence of a________(hydroxyl)functional
group. - ✔✔nucleic acid
✔✔Grouping of the lipids together because: - ✔✔They all share the same property of
being hydrophobic
✔✔What is the bond between two simple sugars called? - ✔✔A glycosidic linkage
✔✔Which functional group is found in both alcohols and carbohydrates? - ✔✔Hydroxyl
✔✔Which of the following would not have a real impact on variation in carbon
skeletons? - ✔✔Isotopes of carbon in the chain
✔✔Which of the following produces ATP? - ✔✔Cyclic electron flow
Non-cyclic electron flow
✔✔The reaction centers in photosystem I and II get their names from the wavelength of
light that is optimally needed to excite their electrons. Which of the following statements
