LIPIDS<3

Question 1

what are lipids?

Answer 1

essencial macromolecules of all living organisms

Question 2

lipids have a widley varied structure which include?

Answer 2

1. FATS (trigylceride)
2. OILS (triglyceride)
3. PHOSPHOLIPIDS ( cell membrane)
4. STERIODS (chemical signalling)
5. CARATENIODS (pigments)

Question 3

what are lipids soluble in?

Answer 3

non polar organic solvent

Question 4

can all cells use fatty acids?

Answer 4

NO

Question 5

when do fatty acids have an increased use?

Answer 5

during starvation, exercise, in suckling period and diabetes millitus

Question 6

what do elcosanoid actions include?

Answer 6

mediation of pain and inflamation

Question 7

what are 20 carbon atoms called?

Answer 7

elcosanoid

Question 8

A fatty acid is SATURATED when it has?

Answer 8

single bonds

Question 9

A fatty acid is UNSATURATED when it has?

Answer 9

one or more double bond

Question 10

fatty acids consist of ——- —- group at head and —- —-

Answer 10

carboxylic acid (COOH) and carbon chain

Question 11

properties of fatty acids depend on?

Answer 11

number of double bonds in hydrocarbon chain

Question 12

An unsaturated configuration of double bonded carbon atoms are either — or —–

Answer 12

CIS or TRANS

Question 13

a saturated fatty acid has what properties at 22 degrees

Answer 13

waxy solid

Question 14

a unsaturated fatty acid has what properties at 22 degrees

Answer 14

liquid

Question 15

what influences melting point?

Answer 15

length of hydrocarbon chain and degree of saturation

Question 16

what interactions between neighbouring tails increase with length

Answer 16

vanderwaals

Question 17

how to name fatty acids

Answer 17

number of carbon atoms in chain ; number of double bonds

Question 18

how to identify full name?

Answer 18

identify first carbon involved in double bond

Question 19

triglycerides transport what around the body

Answer 19

dietry and synthesised fatty acids

Question 20

what is a triglyceride?

Answer 20

fatty acid storage in adipose tissue

Question 21

what does triglyceride consist of?

Answer 21

glycerol with fatty acid attached to each OH group

Question 22

is triglyceride hydrophobic or hydrophilic

Answer 22

hydrophobic

Question 23

what are MICELLES, LIPOSOMES, BILAYERS

Answer 23

semi permanent barrier

allows for diffusion and transport across bilayer

Question 24

micelles, liposomes and bilayers use what transport to get across proteins using transport proteins?

Answer 24

passive and active

Question 25

phosphoglycerides key component in what

Answer 25

membranes and special roles such as lung surfacant or digestion