PHOTOSYNTHESIS

What is the word equation for photosynthesis

water + carbon dioxide - glucose + oxygen

What is the symbol equation for photosynthesis

6H2O + 6C2O - C6H12O6 + 6O2

What affects the rate of photosynthesis

light, temperature, carbon dioxide concentration, chlorophyll concentration

Explain rate of photosynthesis with increased temperature

Rate of photosynthesis increase: particles move quicker with more energy: react more quickly
Rate increases until optimum temperature
Rate falls until zero as the enzymes denature and the substrate can no longer fit

Why does the rate of photosynthesis plateau at a point

one other factor becomes limited

What is glucose used as from photosynthesis

produce starch, make cellulose, produce amino acids, converted to fats, cellular respiration

How is energy needed for photosynthesis gained

Light energy is absorbed by the chlorophyll inside chloroplasts and used for photosynthesis

How is water gained

taken up soil by roots and to leaves via xylem

How is carbon dioxide gained

diffuses into leaf by stomata

How is glucose used to make cellulose

Glucose bind together to make cellulose

How is glucose used to make amino acids

glucose and nitrate ions combine to make amino acids

How is glucose used to make protein

amino acids join to make protein which can make oils/fats which are stored as energy stores in seeds

How is glucose used to make starch

many glucose combine to make starch

What is starch used for

long term storage

Why is starch used for long term storage

its compact, insoluble and easily broken down when needed

Why do most plants keep a good store of starch

When photosynthesis can't occur efficiently, in the night or winter, starch is broken down into glucose for respiration

What type of reaction is photosynthesis

endothermic

How can a plant contain both starch and glucose

Glucose made from photosynthesis and excess glucose is stored as starch

How can a leaf contain glucose but not starch

No light to make more glucose by photosynthesis, starch is broken down into glucose so glucose can be used for respiration

What do farmers usually use for their plants

greenhouses, paraffin heaters, artificial lighting

How do greenhouses help with farming

Trap heat from sunlight
Keep out pests

How does artificial lighting help with farmings

Ensures there's light 24/7
Light energy is used for photosynthesis

How do paraffin heaters help with farming

When the paraffin is burnt it releases lots of heat and carbon dioxide