Photosynthesis Flashcards
What is photosynthesis?
Photosynthesis is an autotrophic means of nutrition for plants that uses the energy from the sun to produce glucose for the plant.
What are the requirements for photosynthesis to occur?
The requirements for photosynthesis to occur are:
-radiant light energy (the sun)
-water (the soil)
-CO₂ (the atmosphere / the stomata)
-chloroplasts (contain chlorophyll / trap sunlight)
-enzymes.
What are the products of photosynthesis?
The products of photosynthesis are glucose (stored as starch) and O₂ (a by-product).
What is the word equation for photosynthesis?
The word equation for photosynthesis is “Carbon Dioxide + Water →(Sunlight, Chlorophyll, Enzymes)→ Glucose + Oxygen.”
What is the chemical equation for photosynthesis?
The chemical equation for photosynthesis is “6CO₂ + 6H₂O →(Sunlight, Chlorophyll, Enzymes)→ C₆H₁₂O₆ + 6O₂.”
What happens in the Light / Light Dependent Phase of photosynthesis?
In the Light / Light Dependent Phase of photosynthesis, light enters into the grana, water enters the double membrane, radiant energy is absorbed and used to split the water molecules into H and O in a process called Photolysis, oxygen is released into the atmosphere as a bi-product, NADPH takes the hydrogen to the next phase in the chloroplast (also carries energy in the form ADP).
What happens in the Dark / Light Independent Phase / Calvin cycle of photosynthesis?
In the Dark / Light Independent Phase / Calvin cycle of photosynthesis, carbon dioxide enters the chloroplast, the energy from the light dependent phase is used to combine the CO₂ with the energised hydrogen (NADPH) to form glucose.
What is the role of ATP?
ATP is the energy carrier in the cell. It also comes in the form ADP (Adenosine Diphosphate). The difference is 1 more or 1 less atom of phosphorus which is the actual energy in the molecule. When energy is needed, ATP is broken down into ADP and the energy is released from the bond of phosphorus and the Adenosine, in a process called dephosphorylation.
What are some factors affecting photosynthesis?
carbon dioxide concentration
light intensity
temperature
How does carbon dioxide concentration affect photosynthesis?
Carbon dioxide concentration is essential for photosynthesis and will increase the rate of photosynthesis until it reaches its optimum amount at which point the rate of photosynthesis will decrease. This is due to the excess CO₂ binding with the H₂O and forming Carbonic Acid and raising the pH of the plant and denaturing photosynthesis requiring enzymes.
How does light intensity affect photosynthesis?
Light intensity will benefit photosynthesis as it increases and will also reach an optimum level. Increase past the optimum level does not affect photosynthesis. The light optimum level also depends on the environmental temp (as the temp ↑, the light optimum level also ↑).
How does temperature affect photosynthesis?
Temperature is directly linked to the enzymes of photosynthesis and also has an optimum level (25℃). Too low a temp leaves the enzymes inactive and too high a temperature causes the enzymes to denature and are rendered useless.
What is the importance of photosynthesis?
The importance of photosynthesis is that glucose and starch are the basis of energy for all heterotrophic organisms
all the excess CO₂ in the atmosphere caused by burning fossil fuels, decomposition, and cellular respirationand O₂ released as a by-product is very useful for cellular respiration and replenishes the O₂ in the atmosphere.
what are green houses
Green houses are buildings used to protect plants from birds and the sort and provide them with perfect photosynthesis conditions. CO₂ levels can be ↑ through burning fossil fuels or adding organic material to decompose, or other ways that produce CO₂. Artificial lighting can be adjusted and shade cloths are used to lower the intensity. Temp is controlled, in winter with heaters, and in the summer with fans
