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WorksheetsCellular Transport
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
Which of the following are not components of the cell membrane?
a)
cell surface markers
b)
transmembrane proteins
c)
interior protein network
d)
plasmodesmata
2.
To cross the cell membrane, water must _____.
a)
squeeze between phospholipid molecules
b)
pass through aquaporins
c)
be transported at the expense of ATP
d)
be moved by a cotransport system
3.
The sodium-potassium pump passes _______.
a)
more Na+ out than K+ in
b)
K+ out and Na+ in on a one-for-one basis
c)
Na+ out and K+ in on a one-for-one basis
d)
K+ and Na+ in the same direction
4.
Exocytosis is a process by which cells _______.
a)
pass substances out of the cell in vesicles
b)
pass substances out of the cell through the membrane by osmosis
c)
release substances directly into the extracellular fluid through a pore
d)
release substances directly into the extracellular fluid through a pit
5.
In each cycle the sodium-potassium pumps transfer _______.
a)
two potassium ions in and two sodium ions out
b)
one sodium ion out and one potassium ion in
c)
three sodium ions out and two potassium ions in
d)
one potassium ion out and two sodium ions in
6.
____________________ are transported by a particular carrier or pass through a particular channel.
a)
All water soluble ions or molecules
b)
Certain water soluble molecules or ions
c)
All insoluble molecules or ions
d)
Certain insoluble ions or molecules
7.
A lipid bilayer is held together by ______.
a)
surface tension
b)
double bonds in their fatty acid tails
c)
the attraction of the phospholipid heads to each other
d)
the hydrogen bonding with water
8.
The net movement of uncharged, polar molecules across a semipermeable membrane from a low concentration to a high concentration occurs by facilitated diffusion.
a)
True
b)
False
9.
ATP is required in the transport of ________.
a)
water molecules
b)
all molecules across a membrane
c)
molecules to areas of higher concentrations
d)
molecules to areas of lower concentrations
10.
The methods of membrane transport that don't require protein channels or carriers are
a)
osmosis
b)
diffusion
c)
exocytosis
d)
all of the above
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