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level: Photosynthesis

Questions and Answers List

level questions: Photosynthesis

QuestionAnswer
Why can Photosynthesis be the Basis of All Life on Earth?-Plants use the Suns, or another Source that gives out Light, to make Glucose -This Glucose is used to Develop the Plant's Ability to Grow - adding onto the Biomass of the Organism -Energy is then Stored in the Biomass, that is Consumed through the Food Chain [Primary Consumer then to Secondary Consumer...] -So no Photosynthesis means no Biomass for the Primary Consumers to Feed on, which will Eventually Knock on to Us.
State the Formula for Photosynthesis and What is Happening?Carbon Dioxide + Water --[Light]--> Glucose + Oxygen 6CO² + 6H²O --> C6H12O6 + 6O² -This is an Endothermic Reaction, so Energy is Taken From the Environment [Surroundings get Colder] -Also, 2 Stages are seen. The First is the Light Energy Splits up the Water and Oxygen into Hydrogen + Oxygen Ions [Photolysis] and the Second Stage is Carbon Dioxide reacting with the Ions to make Glucose and Oxygen Gas.
How can the Rate of Photosynthesis be Affected by?-Light Intensity -Concentration of Carbon Dioxide -Temperature -pH
State a Practical that can be Used to See how the Rate of Photosynthesis can be Affected.-Using Pondweed, to see how much Oxygen it makes in a Given Time is Excellent for finding out how Factors affect the Rate. -Have the Pondweed submerged in Water, that's all in a Glass Thin Cylinder. Then have a Tube that will take the Oxygen made to a Gas Syringe. [Remember not ALL the Oxygen will be there - some will be for Respiration] -Then, do the Experiment Normally with no Factors taking Place - to get a Base, Normal Result. -Then change one of the Factors and Repeat the Experiment with the SAME TIME.
Describe a Graph of Light Intensity against Rate of Photosynthesis and Explain why that is the Case.-Light Level Increases will Increase the Rate of Photosynthesis Linear, until it won't and just stay at a Constant Rate -Why? Because the Limiting Factor will be the Carbon Dioxide Level or the Temperature [or other Factors]
What is the Formula for Light Intensity?Light Intensity ∝ 1/distance²
Describe and Explain a Graph of Rate of Photosynthesis against Concentration of Carbon Dioxide-Carbon Dioxide is Needed for Photosynthesis -And as the Level goes up, so does the Rate in a Linear Fashion -However, it will Level and Stay at a Constant Rate -This is due to the Limiting Factor most probably being the Temperature and so therefore Stopping the Rate of Photosynthesis going Faster and Faster.
Describe and Explain a Graph of Rate of Photosynthesis against Temperature-Enzymes are Involved in Photosynthesis so it has its Own Optimum Temperature -Go to Low and the Graph will Illustrate that the Rate is Slow as well -However, go Past the Optimum Temperature and you have made the Graph take a Sharp Drop due to the Enzyme Denaturing and being Useless.