1.1

Question 1

draw alpha glucose

Answer 1

from C1-4: OH,OH,H,OH

Question 2

draw beta glucose

Answer 2

from C1-4: H,OH,H,OH

Question 3

draw pentose ribose

Answer 3

beta glucose - C3

Question 4

monosaccharides 3

Answer 4

single sugar monomer
glucose
galactose
fructose

Question 5

disaccharide

Answer 5

glucose + glucose = maltose
glucose + galactose = lactose
glucose + fructose = sucrose

Question 6

how r monosaccharides joined tg

Answer 6

by condensation reactions, 1-4 glycosidic bonds

Question 7

structure of starch

Answer 7

amylose + amylopectin
amuse = unbranched chain - long, coiled - only 1-4} so v compact + stores lots of energy
amylopectin = 1,4+1,6 - shorter branched chains - can be rapidly hydrolysed back to glucose - for resp - quickly releases energy

Question 8

structure of glycogen

Answer 8

• highly branched molecule - main energy store in animals
• many alpha glucose molecules joined by 1,4+ 1,6 -> large no side branches - animals move so req more energy
• also relatively large + compact structure so maximises energy storage

Question 9

structure of cellulose

Answer 9

beta glucose - 1,4
long unbranched chains - line up parallel
each chain held by many H bonds
microfibres + microfibrils = strong threads of long cellulose chains joined by many H bonds - provide structural support

Question 10

are polysaccharides insoluble ? effect of this ?

Answer 10

YES ALL ARE
cant leave cell as theyre too large
so they won’t affect water potential as they dont dissolve - have no effect on osmosis