Past Paper 1.1

Question 1

Isomer in cellulose

Answer 1

Beta

Question 2

Structure of starch related to it’s function

Answer 2

Amylose in starch which are joined by 1,4 glycosidic bonds create a helix which means starch is very compact, meaning starch can store a lot of glucose molecules for it’s size.

Question 3

Structure of cellulose in regard to it’s function

Answer 3

Chain of cellulose joines together by hydrogen bonds which create microfibrils, giving structural support to plants.

Question 4

Why triglycerides not polymers?

Answer 4

Fatty acids and glycerol have different structures

Question 5

What type of fatty acid is oleic acid?

Answer 5

Unsaturated, at least one C=C double bond.

Question 6

Twi functions of triglycerides in mammal

Answer 6

Protect internal organs and buoyancy

Question 7

Biochemical test for glucose

Answer 7

Add benedicts reagant and heat, if prsetn, blue -> red/orange/green

Question 8

Positive bendict result for glucose but not suctose?

Answer 8

Glucose reducing sugar, sucrose not.

Question 9

Magnesium function in body

Answer 9

ATP must bond with it to be active

Question 10

Iron function body

Answer 10

Hempglobin: essential for transporting oxygen in blood

Question 11

Phosphatefunction body

Answer 11

Synthesis of high energy compounds (ATP)

Question 12

Calcium function body

Answer 12

Bone mineralisation

Question 13

Storage polysaccharide animal

Answer 13

Glycogen

Question 14

Storage polysaccharide plant

Answer 14

Starch

Question 15

Two bonds present to maintain 3D shape of polypeptide chain

Answer 15

Disulphide

Ionic

Question 16

Two ways structure of phospholipids differe from triglycerides

Answer 16

Phospholipids: 2 fatty acids, polar and hydrophilic.
Triglyceride: 3 fatty acids, non polar and hydrophobic.