3.1.3 Lipids Flashcards

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1
Q

Draw out the structure of a lipid

A

Check it online

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2
Q

What happens when you mix lipids with water

A

They are in insoluble in water
Lipids are nonpolar .
They are hydrophobic

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3
Q

What is the carbon area of the lipid called

A

A triglyceride

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4
Q

What is the effect of double bonds in a fatty acid chain

A

Takes up more space so less effect from London forces
Therefore this reduces melting point

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5
Q

What are the different types of fatty acids and give a breaf description of each

A

Saturated - has no double bonds , has max hydrogens bonded

Monounsaturated- has only one double bond.

Polyunsaturated- has more than one double bond

Omega 3/6 - double bonds start after the 3/6 carbon

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6
Q

Forming a ester bond is called

A

Esterification

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7
Q

What type of reaction is esterification

A

A condensation reaction

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8
Q

Name three features of saturated lipids

A

Has single bonds between carbons and is fully saturated with hydrogens

Strong attraction between chains

Closely packed so has high boiling and melting temperature

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9
Q

name three features about unsaturated lipids

A

Has double bonds and are unsaturated

Link does not allow for optimal storage therefor has low melting and boiling point

Kinks mean that they have low attraction between chains

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10
Q

Describe lipids role in water proofing

A

Hydrophobic so repels water and can act as a barrier e.g cutical in plants upper epidermis

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11
Q

Describe lipids role in thermal insulation

A

Provide thermal insulation from the extra layers

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12
Q

Describe lipids roles in protection

A

Reduces blunt force by spreading the impact across the adipose tissue reducing damage to organs

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13
Q

Describe a test for lipids

A
  1. Mix test substance to ethanol
    2.shake
    3.add water
    4.milky colour indicates lipids
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