Biochem 385 exam 2

Question 1

Fatty acids are amphipathic biomolecules with _ chains and _ head groups.

Answer 1

hydrocarbon, polar carboxyl

Question 2

Saturated Fatty acids contain _ double bonds.

Answer 2

None

Question 3

Unsaturated Fatty acids contain _ double bonds.

Answer 3

Cis or trans.

Question 4

_ consists of three fatty acids esterified to glycerol.

Answer 4

Triacylglycerols

Question 5

Fatty acids and triacylglycerols serve as:

Answer 5

Energy storage molecules

Question 6

Glycerophospholipids and Sphingolipids are:

Answer 6

Membrane lipids

Question 7

Steroid and Eicosanoids serve as:

Answer 7

cell signaling molecules

Question 8

Longer Carbon chain have _ melting point.

Answer 8

Higher

Question 9

Shorter Carbon chain have _ melting point.

Answer 9

Lower

Question 10

What are the 3 saturated fatty acids?

Answer 10

-Myristate
-Polmitate
-Stearate

Question 11

What is the melting point of Stearate?

Answer 11

70 C

Question 12

What is the melting point of Mytistate?

Answer 12

54 C

Question 13

What are the 2 monosaturated fatty acids?

Answer 13

-Palmitoleate
-Oleate

Question 14

what is the melting point of Palmitoleate?

Answer 14

1 C

Question 15

What is the melting point of Oleate?

Answer 15

13 C

Question 16

What are the 3 polyunsaturated fatty acids?

Answer 16

-Linoleate
-a-linolenate
-Arachidonate

Question 17

What is the melting point of linoleate?

Answer 17

3 C

Question 18

what is the melting point of alpha-linolenate?

Answer 18

-11 C

Question 19

what is the melting point of arachidonate?

Answer 19

-50 C

Question 20

Commercial hydrogenation transforms a _ conformation to a _ conformation.

Answer 20

Cis to trans

Question 21

W-3 fatty acid alpha- linolenic acid is converted into:

Answer 21

EPA and DHA

Question 22

W-6 fatty acid linoleic acid is convered into:

Answer 22

arachidonic acid

Question 23

Unsaturated fatty acids in triaglycerols are _ at room temperature because of _ melting point.

Answer 23

liquid, low