Photosynthesis

Question 1

Uses of glucose

Answer 1

Energy in respiration, join together with cellulose to provide strength in cell walls, combine with nitrate ions to produce amino acids, stored as insoluble starch and stored in seeds as fats and oils

Question 2

How is heat optimised in greenhouses

Answer 2

Glass structure traps heat, windows can be opened to provide ventilation and heaters can be used in winter

Question 3

How is light optimised in greenhouses

Answer 3

Glass panes allow light, artificial lamps for night

Question 4

How is CO2 optimised in greenhouses

Answer 4

Paraffin heaters can be used to increase temp and amount of carbon dioxide

Question 5

How can the presence of starch in a plant be measured

Answer 5

Heat to remove waxy cuticle, heat in ethanol to remove colour, rinse in hot water to soften, add iodine solution and if it turns black/ blue starch is present

Question 6

Why must colour be removed before testing with iodine

Answer 6

It Masks colour change

Question 7

Why are some algal cells being considered as a biofuel

Answer 7

They are rich in oil

Question 8

Example of lipid store in plants

Answer 8

Seeds