Cellular Respiration 1

Photosynthesis - Chapter 8

Topics you are responsible forThis chapter goes into much more detail than for what you will be responsible. Thus, the outline of these powerpoint slides and the question bank will be guides to what you should understand. You won’t be responsible for the details of bacterial photosynthesis, energy processing in reaction centers, the enhancement effect, or the specific steps of the electron transport. However, be sure to read about the properties of light and the absorption properties of different pigments.

End of Chapter questions:Understand: all Apply: allSynthesize: all

Do all mQuiz questions

Cellular Respiration 2

Where does photosynthesis occur?

Chloroplast structure

Inner and outer membranes

Thylakoids -- granna

Cellular Respiration 3

What are the characteristics of the photosynthetic pigments?

Chlorophyll and carotenoids

Light harvesting complexes-- light absorbing pigments-- Reactions Centers

e- Resonation

Cellular Respiration 4

What are the two stages of Photosynthesis?

Light dependent reactionsvs

Light independent reactions= “Calvin- Bensen cycle”

Cellular Respiration 5

The L-D reactions

2 “Photosystems”PSII & PSI

Electron transportplastoquinonecytochrome b6-fplastocyanin

ATP synthesis via Photo-phosphorylation

Cellular Respiration 6

What do different depictions of the L-D reactions show?

Z-scheme

Membrane arrangement

Virtual Cell Photosynthesis

Cellular Respiration 7

How are ATP and NADPH used to convert (fix) CO2 into organic molecules?

Calvin-Bensen Cycle-- 3 stages

Calvin cycle

CO2 Fixation Carbon Reduction RUBP Regeneration

RUBP carboxylase/Oxygenase -- “Rubisco”

“C3” photosynthesis

Cellular Respiration 8

What is photorespiration?

“RUBP carboxylase/oxygenase”

Why does it reduce PS carbohydrate yield?

Under which conditions is it most problematic?

Cellular Respiration 9

‘C4’ photosynthesis

How does it differ from C3?

How does it address photorespiration?

In which plants?

Cellular Respiration 10

Why do some plants carry out ‘CAM’ photosynthesis?

“Crassulacean Acid Metabolism”

Which plants?

Why is this beneficial?

-- Water conservation