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Biochemistry > Week 7 > Flashcards

Week 7 Flashcards

1
Q

What do all lipids have in common?

A

They are all hydrophobic

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2
Q

What are the function of triacylglycerols?

A

Energy storage

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3
Q

What are the function of phospholipids and sterols?

A

Structural elements of biological membranes

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4
Q

What are glycolipids?

A

Contain both sugar and lipid portions

Important for cell membrane

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5
Q

What are lipoproteins?

A

Plasma Lipoproteins that are associated with CVD

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6
Q

What are fatty acids?

A

Carboxylic acid with hydrocarbon chain

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7
Q

What is a saturated fatty acid?

A

No double bonds

Saturated with Hydrogen

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8
Q

What is the function of fatty acids?

A

Building blocks of many complex lipids
Central intermediates in metabolism
Free fatty acids are present in trance amounts

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9
Q

What are some common features of fatty acids?

A

Even number of carbon atoms
Are unbranched
Cis configuration

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10
Q

What kind of structure are PUFA fatty acids in?

A

Methylene-bridged not conjugated

Double-single-double-single

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11
Q

What are the commonly occurring saturated fatty acids?

A 
Laurate 
myristate
Palmitate 
Stearate 
Arachidate
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12
Q

Laurate

A

12

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13
Q

Myristate

A

14

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14
Q

Palmitate

A

16

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15
Q

Stearate

A

18

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16
Q

Arachidate

A

20

17
Q

What form does saturated fatty acids adopt?

A

Extended conformations

ZIg-Zag

18
Q

What happens if chain length increases?

A

Melting point increases

Solubility decreases

19
Q

What are the melting points of unsaturated fatty acids?

A

Lower than saturated fatty acids due to cis bond which creates a kink in the molecule

20
Q

What is the relationship between double bonds and melting point?

A

The more the double bonds, the lower the melting temperature

21
Q

What is partial hydrogenation?

A

Hydrogenating a double bonded substance so it has less double bonds

22
Q

What does partial hydrogenation do to unsaturated fatty acids?

A

Trans double bonds which allows fatty acids to adopt an extended conformation

23
Q

What is the melting point of trans fatty acids?

A

Higher than Cis forms

24
Q

Carboxylic acids + Alcohol

A

Esters

25
Q

Carboxylic acids + Acid

A

Anhydride

Biochemistry (14 decks)

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