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Bio 117 Exam 2 Quiz Questions & Answers
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Bio 117 Exam 2 Quiz Questions & Answers
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Bio 117 Exam 2 QuizQuestions & Answers
Why does ADP have less potential energy than ATP?
A. Because ADP has only one phosphate group.
B. Because ATP has adenine in it.
C. Because ATP has ribose as a sugar.
D. Because ADP has only two phosphate groups. - answer D.
Because ADP has only two phosphate groups.
Which one of the following is considered an integral membrane
protein?
a. a protein with its N-terminus in the cytoplasm and its C-terminus
in the extracellular space
b. a protein attached to a transmembrane protein via hydrogen
bonding
c. a protein attached to a phospholipid via ionic bonding with the
head group of the lipid molecule
d. a protein capable of diffusing throughout the cytoplasm of a cell -
answer a. a protein with its N-terminus in the cytoplasm and its C-
terminus in the extracellular space
If FRAP is performed on two membranes, one at 25ºC and the other
at 40ºC, which one of the following results would most likely be
observed?
a. Both membranes would recover fluorescence in the bleached area
at the same rate.
, b. Only the membrane at the lower temperature would recover
fluorescence in the bleached area.
c. Both membranes would recover fluorescence in the bleached
area, but the membrane at the colder temperature would recover
more rapidly.
d. Only the membrane at the higher temperature would recover
fluorescence in the bleached area.
e. Both membranes would recover fluorescence in the bleached
area, but the membrane at the warmer temperature would recover
more rapidly. - answer e. Both membranes would recover
fluorescence in the bleached area, but the membrane at the warmer
temperature would recover more rapidly.
A phospholipid molecule in a membrane can:
a. both spin (rotate around its vertical axis) and move side to side
(lateral movement).
b. spin (rotate around its vertical axis).
c. move side to side (lateral movement).
d. flip (rotate between the two halves of the bilayer). - answer a.
both spin (rotate around its vertical axis) and move side to side
(lateral movement).
In response to seasonal changes in temperature, many organisms
must alter the composition of their plasma membranes to maintain
the proper degree of fluidity. As summer turns to fall and eventually
into winter, which of the following would you predict you would
observe in the plasma membranes of organisms that are unable to
regulate their body temperature?
a. a decrease in phospholipid fatty acid side chain length and a
decrease in side chain saturation
b. an increase in phospholipid fatty acid side chain length and an
increase in side chain saturation
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