Summary
Biology A-Level - Photosynthesis Summary
- Institution
- PEARSON (PEARSON)
Succinct summary of photosynthesis for A-level biology!
[Show more]
Seller
Follow
Content preview
lightenergy
6002 + 6H20 - CGH,z06 +602
Chlorophyll
Photosynthesis is the process where energy
is
from light used to break apartthe strong
bonds in A.O.
It forms glucose and oxygen
waste
It is a series of chemical reactions product
controlled enzymes in 2 main stages:
by
1. The lightdependentreaction
2. The
lightindependentreaction
Limiting factors: Photosynthesis also relies
Light on
coenzymes which aids
SA
Temperature the function of an enzyme.
⑱2 levels chemical great
they transfera to another.
is
coenzyme in photosynthesis
transfers it from one
NADP. It
molecule to another in REDOX
reactions.
structure of chloroplasts:
They are flattered organelles thatare also
double membraned (chloroplast envelope)
found in thylaloid membrane by
I keeps photosynthesis reactants
to reaction sites
-contain chlorophyll which close
absorbs photons
of light (blue/red) for photosynthesis.
- sugars, organic acids,
oil droplets.
where the dependent
light
->
reaction takes place
, photosynthetic pigments in chlorophyll:chlorophyla,
chrophyll b, carotene. - in
thylakoid membrane +
attached to proteins.
2 photosystems to capture lightenergy:
Photosystem 1 (PSI) absorbs bestat 700nm
· -
·photosystem 11 (PSID absorbs best 680nm
at
-
M
A LightDependent Reaction ⑪①
① nee
Lightabsorbed used for:photophosphorylation
NOT USED IN photolysis
reduced NADP
making
LCHTDEP,
~
6C02 +6H20-CoH,Op+ 602
A
used in light
dep
reaction
made in light
dep reaction-wask
NowCychPhoto
phosphorylation product lost try
starte
the
1. Lightenergy (photons, blue-red spectrum) is absorbed
by PSII in chlorophyll. This excitedze- to a
higher energy level.
2. These le-leave the
chlerophyll, oxidising it, and
enter the election carrier molecule, reducing it.
This continues along the e-transfer chain.
3. The e-leaving ps1I must
be replaced - thus
occurs
through photolysis. Light energy splits He0 into
protons, e- and 202
4. As ze- move through e-transfer chain, they
rose
energy. This energy is useda to movecone.
Ht
into the thylaboids so ithas higher
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 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 alwinantony. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £5.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
52510 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now