starch

Question 1

what is starch made of

Answer 1

polymer of alpha glucose molecules linked by glycosidic bonds

Question 2

what shape does starch make

Answer 2

coils into spring shape because of shape of monomer and angle of glycosidic bonds that join c1 to c4 of next monomer

Question 3

what are the two molecules of starch

Answer 3

-amylose
-amylopectin

Question 4

amylose

Answer 4

-long unbranched chain of alpha glucose
-angles of glycosidic bonds give coiled structure (like cylinder)
-makes compact so good for storage

Question 5

amylopectin

Answer 5

-long branched chain of alpha glucose
-side branches means enzyme that break glycosidic bond down has better access
-mean glucose can be released fast

Question 6

what does starch mainly store

Answer 6

major carbohydrate store in plants

Question 7

how is starch usually stored

Answer 7

intracellular starch grains in organelles called plastids

Question 8

when is starch broken down

Answer 8

-respiration for energy
-source of carbon used to make other molecules

Question 9

is starch soluble

Answer 9

insoluble in water

Question 10

why is it important that starch is insoluble

Answer 10

water can’t enter the cells by osmosis which would make them swell