Biology 2107 Exam II

Last Updated By lshimel on 12/10/2011
0 people took this quiz
  • Share
http%3A%2F%2Fwww.funnelbrain.com%2Fqc-79554-p-classmsolistparagraph-styletext-indent-25inmso-listl0-level1-lfo1span-stylefont-familyquottimes-new-romanquot-thesodium-potassium-pump-in-animal-cells-requires-cytoplasmic-atp-to-pump-ionsacross-the-plasma-membrane-when-the-proteins-of-the-pump-are-first-synthesizedin-the-rough-er-what-side-of-the-er-membrane-will-the-atp-binding-site-be-on-span-p.html

The sodium-potassium pump in animal cells requires cytoplasmic ATP to pump ions across the plasma membrane. When the proteins of the pump are first synthesized in the rough ER, what side of the ER membrane will the ATP binding site be on?

Answer:
a)  It will be on the cytoplasmic side of the ER.
b)  It will be on the side facing the interior of the ER.
c)  It doesn't matter, because the pump is not active in the ER.
d)  It could be facing in either direction because proteins are properly reoriented in the Golgi apparatus.
View as Flashcard Quiz
Related Quiz Content
  • You have a friend who lost 7 kg (about 15 pounds) of fat on a regimen of strict diet and exercise. How did the fat leave her body?
    a)It was converted to urine and eliminated from the body.
    b)It was broken down to amino acids and eliminated from the body.
    c)It was converted to ATP, which weighs much less than fat.
    d)It was released as CO2 and H20
    e)It was converted to heat and then released.
    d)It was converted to heat and then released.
  • Which of the following is one of the ways that the membranes of winter wheat are able to remain fluid when it is extremely cold?
    a)by increasing the percentage of unsaturated phospholipids in the membrane
    b)by cotransport of glucose and hydrogen
    c)by decreasing the number of hydrophobic proteins in the membrane
    d)by using active transport
    e)by increasing the percentage of cholesterol molecules in the membrane
    a)by increasing the percentage of cholesterol molecules in the membrane
  • Glucose diffuses slowly through artificial phospholipid bilayers. The cells lining the small intestine rapidly move large quantities of glucose form the glucose rich food into their glucose poor cytoplasm. Which transport mechanism is most probably functioning in the intestinal cells?
    a)simple diffusion
    b)active transport pumps
    c)phagocytosis
    d)exocytosis
    e)facilitated diffusion
    e)facilitated diffusion
  • Which of the following intermediary metabolites enters the citric acid cycle and is formed, in part, by the removal of a carbon (CO2) from one molecule of pyruvate?
    a)citrate
    b)glyceraldehydes-3-phosphate
    c)oxaloacetate
    d)lactate
    e)acetyl CoA
    e)acetyl CoA
  • What kinds of molecules pass through a cell membrane most easily?
    a)small and hydrophobic
    b)ionic
    c)monosaccharides such as glucose
    d)large polar
    e)large and hydrophobic
    a)large and hydrophobic
  • A cell you are studying has a measured potassium concentration in the cytoplasm of 120 mM and an external potassium concentration of 12. If potassium is in electrochemical equilibrium in this cell, you would expect the membrane potential to be approximately ___.
    a)+58 mV
    b)-10 V
    c)-58 mV
    d)+108 mV
    e)+10 V
    c)+10 V
  • You have measured the membrane potential of a poison gland cell from a new frog species. You find that it is 75 mV (inside negative). You also measure the [Na+] to be 8 mM inside and 145 mM outside. From these date you know that:
    a)Na+ would be drive to passively diffuse from the cytoplasm to the outside of the cell.
    b)There is a large electrochemical gradient for Na+ to enter the cell.
    c)Na+ is in electrochemical equilibrium
    d)The Na+ gradient would assist the Na+-K+- ATPase in moving Na+ out of the cell.
    e)All of the above are true.
    b)All of the above are true.
  • When hydrogen ions are pumped from the mitochondrial matrix across the inner membrane and into the intermembrane space, the result is the
    a)reduction of NAD+.
    b)creation of a proton-motive force.
    c)lowering the pH in the mitochondrial matrix.
    d)formation of ATP.
    e)restoration of the Na+/K+ balance across the membrane.
    b)restoration of the Na+/K+ balance across the membrane.
  • Which of the following occurs in the cytosol of a eukaryotic cell?
    a)oxidative phosphorylation
    b)oxidation of pyruvate to acetyl CoA
    c)fermentation and chemiosmosis
    d)glycolysis and fermentation
    e)citric acid cycle
    d)citric acid cycle
  • When chemical, transport, or mechanical work is done by an organism, what happens to the heat generated?
    a)It is used to generate ADP from nucleotide precursors.
    b)It is used to store energy as more ATP.
    c)It is used to power yet more cellular work.
    d)It is transported to specific organs such as the brain.
    e)It is lost to the environment.
    e)It is lost to the environment.
Discussion Board
Biology 2107 Exam II
Biology 2107 Exam II
Quiz Taken:827 people took this quiz
Rate this Quiz
Quiz Tags
Author Information
lshimel
Free Quiz Question From Biology 2107 Exam II
Question: The sodium-potassium pump in animal cells requires cytoplasmic ATP to pump ions across the plasma membrane. When the proteins of the pump are first synthesized in the rough ER, what side of the ER membrane will the ATP binding site be on?
Answer:
It will be on the cytoplasmic side of the ER.
It will be on the side facing the interior of the ER.
It doesn't matter, because the pump is not active in the ER.
It could be facing in either direction because proteins are properly reoriented in the Golgi apparatus.