I achieved a high A* Grade in my final A-Level exams using these notes!!!
I believe you can achieve an A* if you can memorise these notes! Simply use blurting, a method of active recall, to write everything you remember from the notes, then identify the parts you couldn’t remember, then repeat ...
a. light trapping adaptations
leaf
large SA: capture max light
thin: light penetrates through
stomata & air spaces: CO2 diffuse in to photosynthesising cells
transparent cuticle & epidermis: light penetrates through
palisade cell
large vacuoles: chloroplasts form single layer at cell periphery – don’t shade each other
more chloroplasts than spongy mesophyll – near top of cell = more exposed to light: capture max light
chloroplast
thylakoid large SA
move within cell: max light absorption (top) / protect pigments from bleaching (bottom)
rotate within cell
pigments in single layer along thylakoid membrane
b. chloroplasts = transducers: convert light photon energy to chemical energy (ATP)
Photosynthetic pigments – absorb photons at great range of wavelengths of light
Chlorophyll – absorb red & blue-violet Carotenoids – absorb blue-violet
chlorophyll a: yellow-green beta-carotene: orange
chlorophyll b: blue-green xanthophylls: yellow
c. light harvesting by antenna complex to reaction centre to emit e -
Absorption spectra of pigment: how much light absorbed at different wavelengths
Action spectra: rate of photosynthesis at different wavelengths
d. Photosystem 1 (P700) & 2 (P680) – thylakoid membrane: absorb light at range of wavelengths
antenna complex – contains pigments & proteins: energy passed through pigments to reaction centre
reaction centre – 2 chlorophyll a: energy from absorbed light boosts electrons to excited state = emit high-energy e -
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 tnotes. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £2.99. You're not tied to anything after your purchase.
