Lecture 15 - Lipids Flashcards Preview

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Flashcards in Lecture 15 - Lipids Deck (28):
1

The _____ portion of a phospholipid is caused by the FA tail

Hydrophobic

2

The ______ portion of a phospholipid is caused by the polar head group.

Hydrophilic

3

Fatty acids are stored as _____, a fuel molecule.

Triacylglycerols

4

12 carbon fatty acid without double bonds.

???anoic acid

5

18 carbon FA with 1 double bonds

Octadecenoic acid

6

18 carbon FA with two double bonds

Octadecedienoic acid

7

What is represented here? 12:3

A 12 carbon FA with 3 double bonds

8

Delta with superscript number indicates ______

Location of double bond

9

The distal carbon in a fatty acid is called the ______.

Omega carbon

10

How does one number a double bond from the distal carbon?

Omega carbon is 1; # is location of double bond Ex: omega-4 is the 4th carbon from the distal end with a double bond

11

Most unsaturated FAs are in what steric configuration?

cis

12

In two fatty acids of the same length, the melting point will be_____ in the unsaturated chain.

Lower (double bonds increase melting points)

13

Melting points _____ with increasing chain length in unsaturated FAs

Increase

14

Three essential FAs

Linolic - ω6 - C18

Linoleneate - ω-3 - C18

Arachidonic - ω-6 - C20

15

Lipids are ______ in water.

Insoluble

16

What is this structure?

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Triacylglycerol

17

One or more fatty acid chains, a glycerol/sphingosine backbone, and a phosphorylated alcohol

Phospholipid

18

Glycerol backbone, fatty acid, and phosphorylated alcohol

a phospholipid

19

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Phosphatidate; the simplest of phospholipids and a KEY INTERMEDIATE to the synthesis of complex phospholipids

20

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Sphingosine; specialized phospholipid - contains an amino alcohol and an UNSATURATED fatty acid tail

21

Sphingosine backbone with sugar facing ECF.

glycosphingolipid

22

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Phosphatidylserine; important in cognition/learning

23

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Phosphytidalinositol; important in cell signalling

24

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Phosphatidylcholine; important in lung surfactant

25

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Phosphatidylethanolamine; found in the white matter of the CNS

26

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diphosphatidylglyercol; important in the mitochondrial membrane; note the phosphatidyle group attached to a GLYCEROL!!!!!

27

Sphingomyelin and phosphatidylcholamine are both found in the CNS.

What differentiates them?

Sphingomyelin is not a true sphingolipid derivative, as it has an amide bond in one of the FA side chains.

28

Cerebrosides are the simplest _____.

A. Ganglioside

B. Glycolipid

C. Phospolipid

D. Spingolipid

B. Glycolipid. They are derived from sphingolipids, but contain only one sugar.