Starch, glycogen and cellulose

Question 1

Starch is made of…

Answer 1

Amylose + amylopectin and only of alpha glucose

Question 2

Amylose is formed by

Answer 2

Condensation between alpha molecules

Question 3

Amylose has long..

Answer 3

Unbranching chain of 1,4 carbon bonding

Question 4

Amylose chains are curved and…

Answer 4

Coiled up to helical structures.

Question 5

Amylopectin has shorter

Answer 5

Chains than amylose

Question 6

Amylopectin branch…

Answer 6

Out to the sides

Question 7

Amylopectin branches are formed by

Answer 7

1,6 links

Question 8

Amylose + amylopectin build up into…

Answer 8

large starch grains, found in chloroplast and in storage organs(seeds of cereals, potato tubers)

Question 9

Starch is never found in…

Answer 9

animal cells.

Question 10

Glycogen is like…

Answer 10

amylopectin.

Question 11

Glycogen is made of…

Answer 11

1,4 and 1,6 alpha glucose linkages.

Question 12

Glycogen is more…

Answer 12

branched than amylopectin molecules.

Question 13

Glycogen molecules clump…

Answer 13

together to form granules which are visible in liver cells and muscle cells.

Question 14

Glycogen is form of…

Answer 14

energy reserve.

Question 15

Cellulose is most…

Answer 15

abundant organic molecule on the planet.

Question 16

Cellulose is used in…

Answer 16

plant cell walls.

Question 17

Cellulose has a slow…

Answer 17

rate of breakdown in nature.

Question 18

Cellulose is mechanically….

Answer 18

strong.

Question 19

Cellulose is polymer of…

Answer 19

beta glucose.

Question 20

In cellulose the successive glucose units are linked at…

Answer 20

180 degrees. It forms a strong molecule as atoms of OH are attracted to oxygen atoms in the same cellulose molecule (hydrogen bonds).

Question 21

Microfibrils

Answer 21

60-70 cellulose molecules become tightly cross-linked to form bundles.

Question 22

Fibres

Answer 22

Microfibrils are held together in bundles by hydrogen bonding.