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Biology - A level > Lipids and phospholipids > Flashcards

Lipids and phospholipids Flashcards

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1
Q

Are lipids polymers?

A

No

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2
Q

What do all lipids contain?

A

Carbon, oxygen and hydrogen

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3
Q

Why is the proportion of oxygen smaller in lipids than in carbohydrates?

A

because there is more carbon and hydorgen

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4
Q

Are lipids made out of monomers?

A

NO

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5
Q

What sized complex do lipids have?

A

large

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6
Q

What is the lipids complex called?

A

Macromolecules

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7
Q

Are lipids hydrophobic or hydrophilic?

A

Hydrophilic

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8
Q

What are the 3 groups of lipids?

A

Triglycerides, phospholipids, waxes

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9
Q

What do lipids provide in the plasma membrane?

A

flexibility

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10
Q

What d lipids contribute to the transfer of through the cell membrane?

A

Transfer of soluble lipid substances

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11
Q

What kind of source are lipids?

A

Energy

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12
Q

How much more energy do lipids released compared to carbohydrates?

A

Twice

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13
Q

What cause lipids to be waterproof?

A

They’re insoluble

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14
Q

Examples of waterproofing onorganisms

A

Birds - feathers

Plants - Waxy cuticle

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15
Q

Where do lipids provide protection?

A

Around vital organs

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16
Q

What production do lipids help in?

A

Hormone

17
Q

What do lipids provide in aquatic animals?

A

Buyonace

18
Q

What are the 4 parts of a triglyceride?

A

3 fatty acids

1 glycerol

19
Q

What family are fatty acids a part of?

A

Carboxylic

20
Q

WHat family is glycerol a aprt of:

A

Alchol

21
Q

What bond is found i lipids?

A

Ester bond

22
Q

Where is the ester bond found?

A

Oxygen and hydrogen (OH)

23
Q

What reaction happens to cause the ester bond to form?

A

Condensation

24
Q

What uses a condensation reaction to join toghter?

A

Fatty acids and glycerol

25
Q

What can the difference in fatty acids cause?`

A

Rise the proportions of fats and oils

26
Q

What can be the difference in fatty acids? (2)

A

Length

Amount if double carbon bonds

27
Q

What can the doube carbon bond cause?

A

Kinks

28
Q

What happens if there are kinks?

A

They dont fit closely toghter

Biology - A level (18 decks)

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