Notes about the Photosynthesis Topic from Bioenergetics in the GCSE Biology Higher course. These notes are for revision and understanding. They are made using the specification and CGP revision guide.
Photosynthesis
Carbohydrates Chlorophyll
Light energy Without chlorophyll there would be no
Chlorophyll photosynthesis
Carbon dioxide + water --------->oxygen + glucose
Enzymes Variegated plants(green and white) will only store
starch where the plant was green
6CO2 + 6H2O -----> 6O2 + C6H12O6
Is an endothermic reaction Chlorophyll - to make chlorophyll the plant needs
magnesium ions from the soil and carbohydrates
Photosynthesis can be carried out if a plant has: (glucose)
→ light, CO2 and chlorophyll
Magnesium + glucose → chlorophyll
Once photosynthesis is carried out glucose will be
produced which is converted to starch through the Glucose
polymerization process which is then stored in the
leaves. Polymerization process
Glucose -----------------------> starch
Starch is:
- Bigger molecule than glucose Is used to:
- Insoluble in water - Respire - reacts with oxygen which releases
- So it is easier to store. energy for the cells to live and grow
- Made into sucrose
Starch is often stored in seeds of plants - Made into starch - it is a food store
For example starch is stored in potatoes in the winter - Made into cellulose - to strengthen plants
so the plant can survive but also so more potato - Made into other substances such as plant
plants can be grown in spring. oils
Most of the carbohydrates produced are used in Energy released from glucose in respiration:
respiration which can the provide the energy to - Changes sugars, nitrate & other mineral
produce large molecules like starch ions into amino acids which are then used to
make proteins
Plants need mineral ions to make amino acids & - Changes sugars into lipids & starch for
chlorophyll storage in seeds
- Changes sugars into cellulose for cell walls
Mainly used to turn smaller molecules into bigger
ones
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller josephinemcguinness. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $4.15. You're not tied to anything after your purchase.
