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WorksheetsCMB_Unit 2: Cell Membrane Structure and Function
Total questions: 16
Worksheet time: 9mins
The ability to allow only certain molecules into or out of the cell is called __________.
Unpermeable
Selectively permeable or semipermeable
Impermeable
Permeable
The following are functions of the cell membrane, except
Breaks down waste and other compounds.
Regulates the passage of compounds in and out of the cell.
Allows cells to communicate and interact with other cells.
Protects the cell from its environment.
A phospholipid has two parts. What are they called?
Hydrophilic head, Hydrophobic tail
Hydrophobic head, Hydrophilic tail
The image represents the fluid mosaic model. Which of the following best describes the fluid mosaic model?
The cell membrane is constantly moving, bendable and has various proteins embedded in it.
The cell membrane components are stuck in place. It is critical to get the placement right.
The cell membrane is not flexible at all and cannot expand.
The cell membrane allows fluids with sodium to pass through easily.
_____________ is the free movement of particles or molecules across the membrane to spread out evenly into the available space.
diffusion
facilitated diffusion
active transport
fusion
The general name for movement of substances across cell membranes without need of energy input.
passive transport
active transport
Some cells move large particles out of the cell through the process of:
Protein Synthesis
Endocytosis
Exocytosis
Cytoplasmic Streaming
A ______________ is composed of a phosphate and glycerol head and 2 fatty acid chain tails.
cholesterol
glycoprotein
phospholipid
glucose
What does amphipathic means?
contains water-loving and water-fearing parts
contains various proteins embedded to it
contains semipermeable membrane
contains sodium and potassium molecules
What term is used to describe the ability of a surrounding solution to cause a cell to gain or lose water?
Hypertonic
Hypotonic
Equilibrium
Tonicity
How are osmosis and diffusion similar processes?
both move low to high concentrations
both move solute molecules
both move high to low concentrations
both move water molecules
What happens to an animal cell when it is placed in HYPERTONIC solution?
cell swells and bursts
shrinks from water loss
nothing happens
solute moves in and out
A cell containing 80% water and 20% solute, and a solution containing 60% water and 40% solute. What type of solution is this?
hypertonic
isotonic
equilibrium
hypotonic
Plant cells will become turgid when placed in this type of solution.
hypertonic
isotonic
equilibrium
hypotonic
What is the difference between active and passive transport?
cells only do active when they move
only cells with mitochondria carry out active transport
active transport require ATP, passive transport does not
eukaryotes do active transport, prokaryotes do passive transport
For 5 points:
In your own words, explain briefly what happens to a cell with 70% water when it is immersed in a 30% water 70% salt solution.
