B8- Photosynthesis Flashcards
What type of reaction is photosynthesis?
Endothermic
What is photosynthesis?
During photosynthesis energy is transferred from the environment to the chloroplast by light. It is used to convert carbon dioxide and water into sugar(glucose). Oxygen is also formed and released as a by-product.
What is the equation for photosynthesis?
Carbon dioxide + water light glucose +oxygen. >
How are leaves adapted to allow the maximum amount of photosynthesis to take place?
Most leaves are broad giving them a big surface area for light to fall on
Thin so diffusion distance for gases are short
They contain chlorophyll in the chloroplasts to absorb light
Have veins, which bring plenty of water in the xylem to the cells of the leaves and remove the products of photosynthesis in the phloem
They have air spaces that allow carbon dioxide to get to the cells and oxygen to leave by diffusion
They have guard cells that open and close the stomata to regulate gas exchange
What are the limiting factors for photosynthesis
Light
Temperature
Carbon dioxide concentration
Chlorophyll levels in the leaf
What is light intensity and the inverse law?
Light intensity =1/distance^2
Light intensity decrease or increase in inverse proportion to the square of the distance. So if you double the distance between the light and your plant light intensity falls by a quarter
How do plants use glucose?
Plant and algal cells use the glucose produced during photosynthesis for respiration to convert into insoluble starch for storage to produce fats or oils for storage to produce cellulose to strengthen cell walls and to produce amino acids for protein synthesis
What to plants and algal sells and need to make amino acids
Nitrate ions absorbed from the soil or water to make the amino acids used to make proteins
Why are limiting factors important in the economics of enhancing conditions in greenhouses?
to gain the maximum rate of photosynthesis while still maintaining profit
