Fluid Mosaic Model

Question 1

Cell Membrane

Answer 1

Semi fluid phospholipid bilayer

Question 2

“Fluid”

Answer 2

Phospholipids can flow past each other
- Too fluid = too many molecules can diffuse in/out
- Not fluid enough = not enough molecules can diffuse in/out

Question 3

“Mosaic”

Answer 3

Lots of different parts put together

Question 4

Integral Proteins

Answer 4

Proteins that pass through membranes

Question 5

Peripheral Proteins

Answer 5

Proteins that stay on one side of membrane –> may be involved in signalling and communication

Question 6

Protein Channel

Answer 6

Globular protein that allows large or charged molecules (ex. Na+ and glucose) through membrane

Question 7

Receptor Protein

Answer 7

Protein that allows proteins to bind to it, causing a change in shape, resulting in completion or initiation of function inside cell (ex. hormones)

Question 8

Cholesterol

Answer 8

Non-polar lipid that provides stability/rigidity to membrane –> keeps from falling apart in warm environments (organisms in cold environments want less cholesterol)

Question 9

Glycoproteins

Answer 9

Globular proteins with branching carbohydrates that reach out to tell other cells (like white blood cells) this cell is apart of organism - serves as an identifier –> glycolipids do the same

Question 10

Cytoskeleton

Answer 10

Thin, fibrous material that provides structural support and anchors peripheral proteins