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WorksheetsTRANSPORTATION ACROSS THE PLAMA MEMBRANE
Total questions: 24
Worksheet time: 6hrs 0mins
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
Identify a cholesterol molecule
structure A
structure B
structure C
structure D
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 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
Cell membranes are described as selectively permeable.
Four students were asked to explain what this means. Which one is correct?
Student 1: Cell membranes prevent all materials from entering the cell.
Student 2: Cell membranes only provide structural support for the cell.
Student 3: Cell membranes regulate which substances can enter and exit the cell.
Student 4: Cell membranes allow water and water-soluble substances to enter the cell.
Which one does not belong with the others
No energy
Molecules move from high to low concentration
Passive transport
Energy needed
What biomolecule is number one pointing to?
Lipid
Protein
Nucleic Acid
Carbohydrate
Which type of transport can get rid of cellular wastes?
Protein Pumps
Endocytosis
Exocytosis
Facilitated Diffusion
In which solution will water move into a cell?
Hypertonic
Hypotonic
Isotonic
Equilibrium
In the given scenario, what will happen? An egg with a dissolved shell is placed in pure water for 48 hours.
Water will move in and out of the cell equally, and the cell with neither shrink nor swell.
The egg will gain water and swell.
The egg will lose water and shrink.
Ideally, your cells should be in a(n) _______ solution to maintain equilibrium.
isotonic
hypertonic
hypotonic
isometric
