GBIO 200 STILLER EXAM 4 SELU NEWEST UPDATED
ACTUAL WITH COMPLETE QUESTIONS AND
CORRECT ANSWERS// VERIFIED/GRADED A+/
Phospholipids are...
amphipatic
The most common phospholipid(s) on the extracellular side of plasma
membranes is/are ...
phosphatidylcholine
The most common phospholipid(s) on the cytosolic side of plasma
membranes is/are ...
both c and d
(phosphatidylcholine, phosphatidylethanolamine)
Which of the following is NOT a type of membrane protein?
all of these are membrane proteins
(transporters, anchors, receptors enzymes)
True or false? Channels are transmembrane proteins.
true
True or false? Transmembrane proteins are integral proteins.
true
"Porins" are formed by ....
B and C
(multi-pass alpha helices, beta barrels)
Exocytosis ...
, moves molecules out of the cell.
Which of the following is MOST LIKELY to cross a membrane by simple
diffusion?
oxygen gas
The following factors will influence the rate of diffusion (from point A to
point B) EXCEPT?
all of the above are correct - no exceptions!
Active transport involves:
all the above
Bacteriorhodopsin ....
is energized by sunlight
A large integral protein with a few small sugar side chains is a ....
glycoprotein
A small integral protein with a several large sugar side chains is a ....
proteoglycan
In a laboratory activity, red-labeled glucose, blue-labeled water, and
green-labeled ethanol are added to a solution placed over an artificial,
pure phospholipid membrane. Which colors will be observed on the other
side of the membrane after 30 minutes?
b and c
(blue, green)
Aquaporins are ...
water channels.
When calculating the osmotic pressure of a glucose solution that must be
used instead of KCl, what glucose concentration is the osmotic equivalent
of 1 M KCl?
ACTUAL WITH COMPLETE QUESTIONS AND
CORRECT ANSWERS// VERIFIED/GRADED A+/
Phospholipids are...
amphipatic
The most common phospholipid(s) on the extracellular side of plasma
membranes is/are ...
phosphatidylcholine
The most common phospholipid(s) on the cytosolic side of plasma
membranes is/are ...
both c and d
(phosphatidylcholine, phosphatidylethanolamine)
Which of the following is NOT a type of membrane protein?
all of these are membrane proteins
(transporters, anchors, receptors enzymes)
True or false? Channels are transmembrane proteins.
true
True or false? Transmembrane proteins are integral proteins.
true
"Porins" are formed by ....
B and C
(multi-pass alpha helices, beta barrels)
Exocytosis ...
, moves molecules out of the cell.
Which of the following is MOST LIKELY to cross a membrane by simple
diffusion?
oxygen gas
The following factors will influence the rate of diffusion (from point A to
point B) EXCEPT?
all of the above are correct - no exceptions!
Active transport involves:
all the above
Bacteriorhodopsin ....
is energized by sunlight
A large integral protein with a few small sugar side chains is a ....
glycoprotein
A small integral protein with a several large sugar side chains is a ....
proteoglycan
In a laboratory activity, red-labeled glucose, blue-labeled water, and
green-labeled ethanol are added to a solution placed over an artificial,
pure phospholipid membrane. Which colors will be observed on the other
side of the membrane after 30 minutes?
b and c
(blue, green)
Aquaporins are ...
water channels.
When calculating the osmotic pressure of a glucose solution that must be
used instead of KCl, what glucose concentration is the osmotic equivalent
of 1 M KCl?
