Ch. 5 Biology Quiz

Front 1

The membrane is a fluid phospholipid bilayer in which protein molecules are either partially or wholly embedded.

Back 1

Fluid Mosaic Model

Front 2

Purposes of Plasma Membrane:

Back 2

1.) Protects the cell from outside environment by forming a barrier.
2.) Regulates passage of substances into and out of the cell.
3.)Marks the cell as belonging to that particular organism.
4.)Forms cell-to-cell junction s in multicellular organisms so that cells can communicate with each other and coordinate activities.

Front 3

Heads facing out on both surfaces of membrane

Back 3

Hydrophilic Polar Heads

Front 4

Heads facing inside the membrane

Back 4

Hydrophobic Polar Heads

Front 5

These are randomly embedded in the membrane and some span the entire membrane and some do not.

Back 5

Protein

Front 6

This certain thing gives strength to animal cell membranes: other steroids found in plant cell membrane.

Back 6

Cholesterol

Front 7

AKA sugar coat

Back 7

Glycocalyx

Front 8

What forms a glycocalyx?

Back 8

Carbohydrate Chains

Front 9

Carbohydrate Chains form a glycocalyx that:

Back 9

1.) Protects the Cell
2.) Aids in adhesion between cells
3.) Receives signal molecules(communicate)
4.)Helps cells recognize each other

Front 10

Functions of Membrane Proteins:

Back 10

1.) Transport substances across membrane
2.) Act as enzymes
3.)As as receptors for extra cellular substances
4.)Cell Recognition
5.)Adhesion

Front 11

Allows a particular molecule or ion to cross the plasma membrane freely.

Back 11

Channel Protein

Front 12

Selectively interacts with a specific molecule or ion so that it can cross the plasma membrane

Back 12

Carrier Protein

Front 13

The MHC (major histocompatibility complex) glycoproteins are different for each person, so organ transplants are difficult to achieve.

Back 13

Cell Recognition