Exam (elaborations)
Bio 344 Cellular Molecular Biology - Exam 1 Questions answers latest update
- Course
- Bio 344
- Institution
- University Of Texas - Austin
Bio 344 Cellular Molecular Biology - Exam 1 Questions answers latest update
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Bio 344: Cellular Molecular Biology -Exam 1
For an uncharged molecule, the direction of passive transport across a membrane
is determined solely by its _______ gradient. On the other hand, for a charged
molecule, the _______ must also be considered - Concentration, membrane
potential
The net driving force for a charged molecule across a membrane therefore has
teon components and is referred as the __________ gradient - Electrochemical
When this transporter moves both ions in the same direction across the
membrane, it is considered a(n) ______; if the ions move in opposite direction,
the transporter is considered a(n) ________ - Symport, antiport
Membranes lipids are _________ molecules, composed of a hydrophilic portion
and a hydrophobic portion. - amphiphilic
The ________ the phospho -
Which of the following statements about biological membrane are FALSE? -
Charged ions and macromolecules rapidly diffused across them
, Transporting a charged molecule against its electrochemical gradient occurs via
process known as - Active transport
In an aqueous environment, which of the following will spontaneously form
bilayers? - Phospholipids
Which of the following is True concerning movement of phospholipids in the
membrane? - The lateral diffusion of phospholipids in the membrane is fast
relative to transverse ("flip-flop") diffusion
The sodium potassium pump is an example of a - An antiport
Which type of enzyme will reverse the action of a kinase enzyme - Phosphatase
Which of the following is not a phospholipid - Phospholipase C
An enzyme that transfers a phosphate group from ATP to a site a protein is called
a - Protein Kinase
The resting potential of a nerve cell is -70 mV. Opening a chlorine (Cl-) channel
would shift the membrane potential towards - A more negative value
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