Photosynthesis for Dummies

A wonderful revision slide show full of pictures, facts, past exam questions and the answers complete with examiners comments to make you avoid common pitfalls in the exam. This is perfect for last minute cramming.

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Slide 1

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Photosynthesis for dummies.
A nice revision guide for the rest of
us.…read more

Slide 2

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What you will learn/ recap.
· The difference between autotrophic nutrition
and heterotrophic nutrition.
· How to describe the structure of a chloroplast.
· The functions of each part of the chloroplast.
· The stages of photosynthesis and what
happens at each stage.…read more

Slide 3

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What is the difference between autotrophs
and heterotrophs?
· Autotroph: Any organism that can take simple
inorganic substances and can use them to
synthesise organic molecules. I.E. It can make it's
own food.
Heterotrophs: Any organism that must digest organic
substances. I.E. can't make it's own food.…read more

Slide 4

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The Chloroplasts.
The thylakoid membrane contains:
· Chlorophyll and other photosynthetic pigments.
· Lots of thylakoid membranes stack together to form
grana/granum.…read more

Slide 5

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Fabulous Photosystems
· Each photosystem contain a large number of
chlorophyll molecules.
· Photosystem 1 (PS1) absorbs energy of
wavelength 700 nanometres.
· Photosystem (PS2) absorbs energy of
wavelength 6-80-690 nanometres.…read more

Slide 6

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Here is a past exam question from an
OCR paper. You have a minute to
answer it.
· The light-dependent stage of photosynthesis takes place on thylakoid
membranes in chloroplasts. These membranes surround the thylakoid space
(lumen) and are arranged into stacks known as grana. Fig. 2.1 is a diagram
showing the arrangement of photosystems in the thylakoid membrane, and
summarising the processes that take place there. Fig. 2.1 is a diagram
showing the arrangement of photosystems in the thylakoid membrane, and
summarising the processes that take place there.
Name the pigment
represented by P680 and
P700.…read more

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