Photosynthesis

Question 1

Photosynthesis

Answer 1

Is the production of glucose from carbon dioxide and water using light energy trapped by chlorophyll

Question 2

Chemical equation
Word equation

Answer 2

Carbon dioxide + water —>glucose +oxygen
Chlorophyll
6co2 + 6H2o—————-> c6H12o6 + 6o2

Question 3

Role of photosynthesis

Answer 3

Plants use it to make food
Animals get there food from plants
Produces oxygen for aerobic respiration
Removed carbon dioxide from the air

Question 4

Human methods of increasing the rate of photosynthesis

Answer 4

Artificial light - used in greenhouses
Increased temp - increase the enzymes activity

Question 5

Light stage

Answer 5

-dependent on the energy provided by light to carry out reactions
- requires light
-takes place in chloroplast
-7 pigments including chlorophyll
-plants absorb all colours of white light except green and yellow
-each pigment absorbs different coloured light which allowed the chloroplast to absorb much light as possible
-light energy is transferred to electrons which energies the electrons
- energised electron leaves the chlorophyll and enter two pathways
Pathway 1 (cyclic electron flow)
Pathway 2 ( non cyclic electron flow )