1.3Membrane structure

Question 1

Learning objective 1._ learn to draw a plasma membrane structure.

Answer 1

Success criteria:
_Diagram must show phospholipid bilayer 
_cholesterol
_glycoproteins
_glycolipids
_integral and peripheral proteins
_Use the term plasma membrane
_membrane surrounding the cytoplasm

Question 2

Learning objective 2._ Explain how hydrophobic and hydrophilic properties of phospholipids helps to maintain structure.

Answer 2

Success criteria:
Clear drawing of phospholipids.
Clear discription hydrophilic and hydrophobic means.

Question 3

Plasma membrane_Objective_

Answer 3

Describe:
_structure
_Arrangement of phospholipids

Question 4

What are membranes?_Function

Answer 4

_keeping cellular components inside the cell.
_Allowing selected molecules to move in and out the cell.
_Isolating organelles_Cytoplasm-allowing processes to occur separately.
_A site for biochemical reactions.
_Allows cells to change shape.

Question 5

Disproven_Modal: Davson-Danielli modal

Answer 5

Problems:
_Membrane proteins vary greatly between different cells.\
_Unclear how proteins would allow for change in shape -without breaking bonds.
_Membrane proteins are hydrophobic and should not be found in aqueous cytoplasm or extracellular environment.

Question 6

What membranes contain.

Answer 6

Phospholipids
Proteins
Carbohydrates
Cholesterol

Question 7

Phospholipid

Answer 7

Type of Lipid

Lipid Groups_Oils_Fats_Triglycerides

Question 8

Phosphate_The Head

Answer 8

Properties:

Phosphate _(Has a negative charge and is attracted to water)
Glycerol

Characteristic:
Hydrophilic(water loving)
Polar(Uneven distribution)
Soluble(Mixes with water)

Question 9

Phospholipid_The Tail

Answer 9

Properties:

Fatty acid

Characteristics:

Hydrophobic(Water hating)
insoluble(Will not mix with water)