Notes 6.2

Photosynthesis

Standards

• CLE 3210.3.3 Investigate the relationship between the processes of photosynthesis and cellular respiration.

• SPI 3210.3.3 Compare and contrast photosynthesis and cellular respiration in terms of energy transformation.

Find a Partner

Quick Review

1. Where does photosynthesis happen?

2. Where do the light reactions happen?

3. What are the reactants and products of the light reactions?

Where does it happen?

• Two Stages:– Light Cycle:

– Calvin Cycle:

Takes place in the thylakoid

Takes place in the stroma

Light-Dependent Cycle

• Reactants:

• Products:

H2O and Light energy from the environment

NADP+ and ADP+ from the Calvin cycle.

O2 gas – released through stoma

ATP and NADPH – to Calvin cycle

Calvin Cycle

• Reactants:

• Products:

CO2 – from atmosphere

ATP & NADPH – from light cycle

Sugar & other monomers for macromolecules such as amino acids (proteins) and fatty acids (lipids)

Making Connections

• Look in your book on page 120 and find out what “carbon fixation” is.

• Look up “nitrogen fixation” in your glossary.

• How are these two similar?

Stomata

• Stomata (plural) stoma (singular):Specialized cells that create a pore in the leaves that allow air (CO2, O2, water vapor) to come and go.

Diffusion in Action

With your partner – think/pair/share• Describe why plant cells may want to

close their stoma.

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