Chloroplasts

Label the diagram of a chloroplast

Explain how the structure of a chloroplast allows it to carry out its function.

Organisms and their energy sources

Autotrophs HeterotrophsDo they respire?Can they synthesis complex organic molecules from simple inorganic molecules?Do they use light energy?Can they hydrolyse complex organic molecules?Examples

Photosystems and pigments

Describe how photosynthetic pigments are arranged into photosystems.

The diagrams below show the absorbance and action spectra of photosynthesis.

Describe the absorbance spectrum.

Describe the action spectrum.

Explain the link between the absorption spectra and the action spectra.

Suggest why it is an advantage for chlorophyll to be a mixture of pigments.

The light dependent stage: Photophosphorylation

Use the diagram above to help you describe how ATP is formed during non-cyclic photophosphorylation.

Describe the process of cyclic photophosphorylation.

Limiting factors

Define the term limiting factor.

State three factors that may limit the rate of photosynthesis.

Describe the pattern shown in the graph.

Explain the pattern shown in the graph

Explain how an increase in light intensity will affect the relative concentrations of:

RuBP GP TP

The light independent stage: The Calvin Cycle

Fill in the blanks.

Describe the role of carbon dioxide in photosynthesis.

Describe the role of rubisco in photosynthesis.

Investigating limiting factors

You are provided with the following equipment: pondweed, small bottles with lids, water baths at 5 different temperatures (20oC, 30 oC, 40 oC, 50 oC, 60 oC), a light source, hydrogencarbonate indicator, a metre ruler, a 30cm ruler.

Write a brief method that would allow another student to investigate how temperature affects the rate of photosynthesis in pondweed.

Describe the expected pattern of results.

Explain the expected pattern of results.