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Flashcards in Phospholipid Deck (20):
1

Define hydrophilic

Water loving

2

Define hydrophobic

Water fearing

3

Define amphipathic

describing a molecules which has both hydrophobic and hydrophilic properties

4

Outline the amphipathic properties of phospholipids

Phospholipids contain hydrophilic heads and hydrophobic tails

5

Explain why phospholipids form bilayers in water, with reference to hyrdrophillic phosphate heads and two hydrophobic hydrocarbon tails

There is water both outside the cell and inside the cell.

So, phospholipids will arrange themselves in a bilayer so that the hydrophilic head associates with the water and the hydrophobic tails face each other (away from the water)

6

Head of a phospholipid is made up of

Phosphate bounded to glycerol

7

Tails of a phospholipids are

chains of hydrogen and carbon atoms (AKA a hydrocarbon chain)

8

How is the head of a phospholipid hydrophilic?

head is exposed to water

9

How are the tails of phospholipids hydrophobic?

tails are oriented inside the bilayer

10

"P" means

phosphate group

11

"O" means

glycerol

12

how to know if fatty acids are present in a diagram?

it is everything else except P or O

13

Unsaturated hydrocarbon tail

not tightly packed and there is atleast one double bond between the carbons

14

hydrogens in an Unsaturated hydrocarbon tail

have fewer hydrogens present that can bond to the carbons (so there is a double bond between the carbons)

15

What do Unsaturated hydrocarbon tails cause?

kinked chains (which increases fluidity in the membrane, and hinders close packaging of phospholipids)

16

saturated hydrocarbon tail

all tightly packed and there are no double bonds between the carbons

17

hydrogens in a saturated hydrocarbon tail

-have as many hydrogens present as can bond to the carbons (So they lack double bonds)

18

Structure of saturated hydrocarbon tail

chain is always straight!

19

Watery environment on top of a phospholipid

Extracellular fluid

20

Watery environment on the bottom of a phospholipid

Cytosol