BCMB 311 Practice Exam Questions with Verified
Correct Answer
which of the following channels would not be expected to generate a change in voltage by
movement of its substrate across the membrane where it is found
an aquaporin
transporters, in contrast to channels, work by
specific recognition of transport substates
you have generated antibodies that recognize the extracellular domain of the Ca2+- pump.
Adding these antibodies to animal cells blocks the active transport of Ca2+ from the cytosol
into the extracellular environment. What do you expect to observe with respect to
intracellular Ca2+
Ca2+- pumps into the endoplasmic reticulum membrane keep cytosolic calcium levels low
what describes the behavior of a gated channel
it opens more frequently in response to a given stimulus
when the net charge on either side of the plasma membrane is zero, what else is true
the electrochemical potential across the membrane is zero
which of the following stages in the breakdown of the piece of toast you had for breakfast
generates the most ATP
oxidative phosphorylation
, what description describes the function of a kinase
an enzyme that catalyzes the addition of phosphate groups to other molecules
what process does NOT take place in the mitochondria
glycogen breakdown
The oxygen-dependent reactions required for cellular respiration were originally thought to
occur in a linear pathway. By using a competitive inhibitor for one enzyme in the pathway,
investigators discovered that these reactions occur in a cycle. What compound served as the
inhibitor?
malonate
in the final stage of the oxidation of food molecules, a gradient of protons is formed across
the inner mitochondrial membrane, which is normally impermeable to protons. If cells
were exposed to an agent that causes the membrane to become freely permeable to protons,
which of the following effects would you expect to observe?
the ratio of ATP to ADP in the cytoplasm would fall
Pyruvate is an important metabolic intermediate that can be converted into several other
compounds, depending on which enzyme is catalyzing the reaction. What cannot be
produced from pyruvate in a single enzyme-catalyzed reaction
citrate
modern eukaryotes depend on mitochondria to generate most of the cell's ATP. How many
molecules of ATP can a single molecule of glucose generate
Correct Answer
which of the following channels would not be expected to generate a change in voltage by
movement of its substrate across the membrane where it is found
an aquaporin
transporters, in contrast to channels, work by
specific recognition of transport substates
you have generated antibodies that recognize the extracellular domain of the Ca2+- pump.
Adding these antibodies to animal cells blocks the active transport of Ca2+ from the cytosol
into the extracellular environment. What do you expect to observe with respect to
intracellular Ca2+
Ca2+- pumps into the endoplasmic reticulum membrane keep cytosolic calcium levels low
what describes the behavior of a gated channel
it opens more frequently in response to a given stimulus
when the net charge on either side of the plasma membrane is zero, what else is true
the electrochemical potential across the membrane is zero
which of the following stages in the breakdown of the piece of toast you had for breakfast
generates the most ATP
oxidative phosphorylation
, what description describes the function of a kinase
an enzyme that catalyzes the addition of phosphate groups to other molecules
what process does NOT take place in the mitochondria
glycogen breakdown
The oxygen-dependent reactions required for cellular respiration were originally thought to
occur in a linear pathway. By using a competitive inhibitor for one enzyme in the pathway,
investigators discovered that these reactions occur in a cycle. What compound served as the
inhibitor?
malonate
in the final stage of the oxidation of food molecules, a gradient of protons is formed across
the inner mitochondrial membrane, which is normally impermeable to protons. If cells
were exposed to an agent that causes the membrane to become freely permeable to protons,
which of the following effects would you expect to observe?
the ratio of ATP to ADP in the cytoplasm would fall
Pyruvate is an important metabolic intermediate that can be converted into several other
compounds, depending on which enzyme is catalyzing the reaction. What cannot be
produced from pyruvate in a single enzyme-catalyzed reaction
citrate
modern eukaryotes depend on mitochondria to generate most of the cell's ATP. How many
molecules of ATP can a single molecule of glucose generate
