Lecture Set 5

Question 1

What are 3 other functions of nucleic acids?

Answer 1

1) energy storage (ATP)
2) co enzymes (coA)
3) signalling (cAMP)

Question 2

What are the 6 types of glycosidic bonds?

Answer 2

1) O-glycosidic
2) N-glycosidic
3) alpha (1 and 6 hydroxyls on opposing side)
4) beta (1 and 6 hydroxyls on same side)
5) 1-4 –> regular
6) 1-6 –> branch points

Question 3

What is the carrier for sucrose synthesis?

Answer 3

UDP glucose

Question 4

What are the different types of polysaccharides and examples?

Answer 4

Starch (amylose, amylopectin), glycogen
amylose –> linear, alpha 1-4 linkage
amylopectin, glycogen –> branched, alpha 1-4 and 1-6

Question 5

Why are amylopectin and glycogen branched?

Answer 5

glucose can only be removed from non-reducing ends, which are the terminal glucose molecules at the end of branches. More branches = more glucose that can be released at once, so it is more efficient

Question 6

What changes when there is an unsaturated fatty acid

Answer 6

reduces van der waals, reduces melting point

Question 7

What are the different types of lipids?

Answer 7

Storage (triacylglycerol)

Membrane (phospho or glycolipids) –> glyercophospholipid, sphingomyelin, sphingolipids

Question 8

Examples of glycerophospholipid

Answer 8

phosphotidylcholine,

Question 9

Difference between ganglioside and cerebroside

Answer 9

types of sphingolipids, cerebroside has one sugar, ganglioside has 3