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Worksheetsthe plasma membrane
Total questions: 20
Worksheet time: 13mins
Which type of biological macromolecule is the main component of the plasma membrane?
carbohydrate
lipid
protein
nucleic acid
What is the function of cholesterol in a plasma membrane?
To make the membrane flexible
To control the effect of temperature changes
To attract water molecules
To allow nutrients and other essential molecules into the cell
Which is NOT a function of the membrane?
it forms a selective barrier, allowing some things in while keeping others out
maintains homeostasis
it is the control center of the cell
boundary between the inside of the cell and its environment
Plasma membranes are selectively permeable. This means
anything can pass in and out
the membrane regulates the passage of the material in and out of the cell
glucose cannot enter the cell
cholesterol cannot enter
Identify a cholesterol molecule
structure A
structure B
structure C
structure D
identify a glycolipid
structure A
structure B
structure C
structure D
Identify a glycoprotein.
structure A
structure B
structure C
structure D
A major function of glycoproteins and glycolipids in the membane is to
glue cells together to form tissues
allow cells to identify each other
attach membrane to cytoskeleton
help retain shape
Which of these is NOT embedded in the hydrophobic portion of the lipid bilayer at all?
peripheral proteins
transmembrane proteins
integral proteins
all of these are embedded
If a cell is in an extremely hot environment, what is the function of cholesterol in the plasma membrane?
the cholesterol will increase the fluidity of the plasma membrane by making sure the phospholipids don't stick together
the cholesterol will do nothing
the cholesterol will decrease the fluidity of the plasma membrane by holding the phospholipids together
the cholesterol will increase the fluidity of the plasma membrane by increasing the number of cholesterol molecules in the plasma membrane
If a cell is in an extremely COLD environment, what is the function of cholesterol in the plasma membrane?
the cholesterol will increase the fluidity of the plasma membrane by making sure the phospholipids don't stick together
the cholesterol will do nothing
the cholesterol will decrease the fluidity of the plasma membrane by holding the phospholipids together
the cholesterol will increase the fluidity of the plasma membrane by increasing the number of cholesterol molecules in the plasma membrane
Transport proteins move substances and wastes through the plasma membrane that cannot get through because they are too big.
True
False
Which is NOT a function of the membrane?
it forms a selective barrier
it has receptors for chemical messages
it is the control center of the cell
it is involved in self recognition
This image is an example of a phospholipid. Which part of a phospholipid is HYDROPHOBIC?
the phosphate "head"
the lipid "tails"
This image is an example of a phospholipid. Which part of a phospholipid is HYDROPHILIC?
the phosphate "head"
the lipid "tails"
What does "hydrophilic" mean?
water loving, associates with water
water fearing, does not associate with water
a world war II submarine
an example would be solutes like oil or fat
In the plasma membrane, polar heads face the _________ outside of the membrane where the non-polar tails face the ________________ of the membrane.
inside, outside
outside, inside
Which type plasma membrane structure allows substances and wastes to move through the membrane?
transport proteins
carrier proteins
movement proteins
elimination proteins
chose the correct option for labelling the mitochondria
a. outer membrane
b. inner membrane
c. matrix
d. cristae
a. inner membrane
b. outer membrane
c. cristae
d. matrix
a. inner membrane
b. envelope
c. lamellae
d. cytoplasm
a. outer membrane
b. inner membrane
c. lumen
d. matrix
chose the correct option for the labelled parts
a. golgi apparatus
b. cell membrane
c. cellulose
d. vacuole
e. chloprophyll
a. mitochondria
b. cell wall
c. outer membrane
d. gas vacuole
e. chloroplast
a. mitochondria
b. cytoplasm
c. cell wall
d. vacuole
e. chloroplast
a. mitochondria
b. plasma membrane
c. cell wall
d. vacuole
e. chloroplast
