You just need to know the inputs, outputs, location (and a bit about chloroplasts) and factors that affect the rate of photosynthesis (e.g. temperature)
Yes you need to know the exact number of molecules, however you don't need to know the number of ATP produced in photosynthesis (but you do need to know how many are produced in each stage in respiration).
Study design dot pointsPhotosynthesis
• the purpose of photosynthesis
• chloroplasts as the site of photosynthesis, an overview of their structure and evidence of their bacterial origins
• inputs and outputs of the light dependent and light independent (Calvin cycle) stages of photosynthesis in C3
plants (details of the biochemical pathway mechanisms are not required)
• factors that affect the rate of photosynthesis, including light, temperature and carbon dioxide concentration.
When it refers to the purpose of photosynthesis, you just need to understand that oxygen is just a waste product, and that the glucose is intended to be used by the plant in its own cellular respiration.
We definitely don't expect you to read through all of these pages. Having said that I recently compiled all the questions that I thought are still relevant
here. Your question isn't on there anyway though so don't worry about it
Also welcome
the bio section is the best section of the forums