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Source: photosynthesis-notes.pdf · p.1
Quiz
Four quick questions
Pick an answer and you'll see straight away whether it's right, and why.
1.Which gas is produced by photosynthesis?
2.Which pigment absorbs the light energy used in photosynthesis?
3.Which of these is NOT a limiting factor for photosynthesis?
4.Plants store glucose for later as…
Tutor
Answers from the notes, with the page they came from
The tutor answers from what you uploaded and points to where it found it. When your material doesn't cover something, it says so.
You
Why does the rate of photosynthesis stop going up when I keep increasing the light?Tutor
Because another factor has become the limiting one. At low light, light intensity is what holds the rate back, so more light means a faster rate. Once there's plenty of light, the plant is now limited by something else, usually carbon dioxide concentration or temperature, so adding even more light makes no difference. Your notes show this as the graph levelling off into a plateau.You
What is the Calvin cycle?Tutor
Your notes don't cover the Calvin cycle, so this isn't from them. In general terms, it is the set of reactions inside the chloroplast that uses the energy captured from light to turn carbon dioxide into sugar. At GCSE you're not expected to know its steps; the word equation and the limiting factors in your notes are what the exam asks for.