Biology GCSE
photolysis
What photolysis means in Biology GCSE, as defined for OCR.
Definition of photolysis
Check what you remember
Read the wording for your board, then hide it and explain photolysis in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
In the first light-dependent stage, light energy absorbed by chlorophyll splits water molecules, releasing oxygen gas as a byproduct while generating ATP and hydrogen.
Topics that use photolysis
- Photosynthesis (OCR GCSE)
Related terms
- axis scaling
- Biomass
- bubble counting
- Bunsen burner
- carbon dioxide concentration
- chlorophyll
- chloroplasts
- commercial applications
Using photolysis in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Biology questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Biology GCSE termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge