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Worksheetsbiology: cell membrane & magnification
Total questions: 12
Worksheet time: 4mins
Name
Class
Date
1.
which letter shows the lipid bilayer?
a)
c
b)
f
c)
h
d)
g
2.
How many nanometers (nm)
= 1 mm?
= 1 mm?
a)
1,000
b)
10,000
c)
100,000
d)
1,000,000
3.
To calculate magnification we use......
a)
image size x actual size
b)
image size ÷ actual size
c)
actual size ÷ image size
4.
at low temperature cholesterol increases the (a) of the membrane
5.
If the image measures 100 mm and the scale bar is is 50 µm, what is the magnification?
a)
2,000 x
b)
150 x
c)
5,000 x
d)
20 x
6.
A ______________ is composed of a phosphate and glycerol head and 2 fatty acid chain tails.
a)
phospholipid
b)
Carbohydrate
c)
Cholesterol
d)
Protein
7.
It forms a boundary between the inside of the cell and the outside of the cell.
a)
Cell Membrane
b)
Lipid Cleric Layer
c)
Membrane Gate
d)
Protein Receptors
8.
Something is ___________ ____________
when some molecules can cross the membrane while others cannot.
when some molecules can cross the membrane while others cannot.
a)
Selectively (or Semi) Permeable
b)
Totally Transparent
c)
Liquid Licorice
d)
Heavily Patrolled
9.
What forms the channels and pumps in the phospholipid bilayer?
a)
carbohydrates
b)
proteins
c)
hydrophilic heads
d)
lipids
10.
Which of the following is NOT part of the cell membrane?
a)
Lipids
b)
Carbohydrates
c)
Proteins
d)
Nucleic Acids
11.
Hydrophobic region of the cell membrane?
a)
E
b)
B
c)
C
d)
A
12.
Which statement best describes the cell membrane?
a)
The protective outer layer that controls what enters and leaves the cell.
b)
Stores information on DNA molecules / Directs and controls the activities of the cell.
c)
A folded membrane that moves materials around inside cells / Also acts as the site of manufacturing materials needed by the cell.
d)
The smallest organelle with a huge job / Makes proteins, which are the building blocks of the body.
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