BIOLOGY 180 COMPREHENSIVE EXAM QUESTIONS AND
ANSWERS RATED A+
✔✔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
is true then about these excitation wavelengths? - ✔✔They are found in the violet range
of the visible light spectra.
✔✔Which of the following terms is NOT associated with photosystem II? - ✔✔cyclic
electron flow
✔✔products produced when a single NADH delivers electrons to the electron transport
chain - ✔✔
✔✔Where are the enzymes for the citric acid cycle found? - ✔✔In the matrix of the
mitochondria.
✔✔How does pyruvate enter the matrix of the mitochondrion? - ✔✔Active transport
✔✔In human muscle cells, what are the end products of fermentation? - ✔✔Lactate and
NAD+
✔✔In order to attach a particular amino acid to the tRNA molecule that will transport it,
an enzyme, an aminoacyl-tRNA synthetase, is required, along with ATP. Initially, the
enzyme has an active site for ATP and another for the amino acid, but it is not able to
attach the tRNA. What must occur in order for the final attachment to occur? - ✔✔The
binding of the first two molecules must cause a 3-dimensional change that opens
another active site on the enzyme.
✔✔Most electronegitave to least - ✔✔Oxygen
Nitrogen
Carbon
Hydrogen
Potassium
✔✔ The longer the wavelength the higher the energy of an electromagnetic wave -
✔✔False
✔✔Which of the following elements has a valence of two? - ✔✔Oxygen and Sulfur
, ✔✔What type of bond is formed by the equal sharing of valence electrons? - ✔✔A non-
polar covalent bond
✔✔Polar molecules, such as water, will commonly participate in which of the following
intermolecular interactions - ✔✔Hydrogen bonding with polar molecules.
Electrostatic interaction with ionic compounds.
✔✔Which of the following compounds would have the capability of forming a hydrogen
bond? - ✔✔A molecule formed by polar covalent bonds.
✔✔What is the concentration of a solution with a volume of 300 mL containing 24 grams
of sucrose (C12H22O11)? - ✔✔8%
✔✔A weak acid like acetic acid: - ✔✔Will resist changes in pH so long as the pH is near
the pKa.
✔✔Which of the following are true regarding pKa? - ✔✔pKa is the negative logarithm of
the Ka.
pKa is the pH when the conjugate base and weak acid are at the same concentration.
pKa is physical characteristic of each unique buffering system
pH = pKa + log ([A-] / [HA])
✔✔A certain channel protein in the cell membrane is equally permeable to both Na+
and K+. Na+ concentrations are high on the outside of the cell (which is positive), while
K+ concentrations are high on the inside of the cell (which is negative). Assuming equal
concentration gradients for both Na+ and K+, which of the following statements is true
regarding the movement of these ions through this channel? - ✔✔More Na+ ions will be
transported.
✔✔Which of the following types of transport can use the electrochemical gradient of
sodium to move a solute against its concentration gradient? - ✔✔Secondary Active
Transport
✔✔Which of the following membrane activities require energy from ATP hydrolysis? -
✔✔Na+ ions moving out of the cell.
✔✔Which of the following processes would enable a cell to take in large quantities of a
specific molecules such as LDL cholesterol? - ✔✔Phagocytosis
Receptor mediated endocytosis
✔✔A drug designed to inhibit the response of cells to testosterone would almost
certainly result in which of the following? - ✔✔A decrease in transcriptional activity of
certain genes.
ANSWERS RATED A+
✔✔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
is true then about these excitation wavelengths? - ✔✔They are found in the violet range
of the visible light spectra.
✔✔Which of the following terms is NOT associated with photosystem II? - ✔✔cyclic
electron flow
✔✔products produced when a single NADH delivers electrons to the electron transport
chain - ✔✔
✔✔Where are the enzymes for the citric acid cycle found? - ✔✔In the matrix of the
mitochondria.
✔✔How does pyruvate enter the matrix of the mitochondrion? - ✔✔Active transport
✔✔In human muscle cells, what are the end products of fermentation? - ✔✔Lactate and
NAD+
✔✔In order to attach a particular amino acid to the tRNA molecule that will transport it,
an enzyme, an aminoacyl-tRNA synthetase, is required, along with ATP. Initially, the
enzyme has an active site for ATP and another for the amino acid, but it is not able to
attach the tRNA. What must occur in order for the final attachment to occur? - ✔✔The
binding of the first two molecules must cause a 3-dimensional change that opens
another active site on the enzyme.
✔✔Most electronegitave to least - ✔✔Oxygen
Nitrogen
Carbon
Hydrogen
Potassium
✔✔ The longer the wavelength the higher the energy of an electromagnetic wave -
✔✔False
✔✔Which of the following elements has a valence of two? - ✔✔Oxygen and Sulfur
, ✔✔What type of bond is formed by the equal sharing of valence electrons? - ✔✔A non-
polar covalent bond
✔✔Polar molecules, such as water, will commonly participate in which of the following
intermolecular interactions - ✔✔Hydrogen bonding with polar molecules.
Electrostatic interaction with ionic compounds.
✔✔Which of the following compounds would have the capability of forming a hydrogen
bond? - ✔✔A molecule formed by polar covalent bonds.
✔✔What is the concentration of a solution with a volume of 300 mL containing 24 grams
of sucrose (C12H22O11)? - ✔✔8%
✔✔A weak acid like acetic acid: - ✔✔Will resist changes in pH so long as the pH is near
the pKa.
✔✔Which of the following are true regarding pKa? - ✔✔pKa is the negative logarithm of
the Ka.
pKa is the pH when the conjugate base and weak acid are at the same concentration.
pKa is physical characteristic of each unique buffering system
pH = pKa + log ([A-] / [HA])
✔✔A certain channel protein in the cell membrane is equally permeable to both Na+
and K+. Na+ concentrations are high on the outside of the cell (which is positive), while
K+ concentrations are high on the inside of the cell (which is negative). Assuming equal
concentration gradients for both Na+ and K+, which of the following statements is true
regarding the movement of these ions through this channel? - ✔✔More Na+ ions will be
transported.
✔✔Which of the following types of transport can use the electrochemical gradient of
sodium to move a solute against its concentration gradient? - ✔✔Secondary Active
Transport
✔✔Which of the following membrane activities require energy from ATP hydrolysis? -
✔✔Na+ ions moving out of the cell.
✔✔Which of the following processes would enable a cell to take in large quantities of a
specific molecules such as LDL cholesterol? - ✔✔Phagocytosis
Receptor mediated endocytosis
✔✔A drug designed to inhibit the response of cells to testosterone would almost
certainly result in which of the following? - ✔✔A decrease in transcriptional activity of
certain genes.
