Ch. 6 Photosynthesis

Mrs. StewartHonors Biology

Central Magnet School

Notes 6.1 - Light Reactions

Page 113

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.

Objectives

•Identify the reactants and products for the light cycle of photosynthesis

•Identify the location of the light cycle

Find a Partner

With your partner

1. Define autotrophs and heterotrophs, and give an example of each.

2. How is photosynthesis and energy related to each of those is number 1?

•Watch the video

•Answer the following questions:• What are the flowers doing?•Why are they doing it?

•Photosynthesis light reaction video

Photosynthesis Basics

Where does photosynthesis take place?

In organelles called chloroplasts.

Chlorophyll

•Chloroplasts contain the pigment known as chlorophyll

Pigments

•Absorb different wavelengths of light (colors)•Reflect (transmit) what they do not

absorb•We see what is reflected back.

The Visible Light Spectrum

Absorption of Light byChlorophyll a and Chlorophyll b

Dogs and Monkeys TogetherThink – pair - share

•Why are leaves (plants) green?

Light Reactions

Reactants:

Products:

Light in the form of photons, water,

NADP+, ADP, Phosphorous

ATP, NADPH, oxygen

What you need to know:

• Where do the light reactions occur?

• What is needed?

• What is created?

In the thylakoids that are inside chloroplasts.

Light (photons), water

ATP & NADPH go on to Calvin cycle; and oxygen that is released.

•Discovery – photosynthesis video

•Identify the reactants and products of the light cycle in the video•Identify the location of the light cycle in

the video

Objectives

•Identify the reactants and products for the light cycle of photosynthesis

•Identify the location of the light cycle

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.

Notes 6.2

Calvin Cycle

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.

Objectives•Compare and contrast the light-

dependent and light-independent cycles of photosynthesis in terms of reactants and products

•Identify the location for the light-independent (Calvin cycle) for photosynthesis

Dogs•Tell your monkey where the reactions

of photosynthesis will occur in relation to a plant cell

Monkeys•Tell your dog the reactants for the

light– dependent reactions of photosynthesis

Dogs•Tell your monkey the products for the

light– dependent reactions of photosynthesis

Monkeys•Tell your dog where the light–

dependent reactions of photosynthesis occur - specifically

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)

Putting it all together

Making ConnectionsTogether

•How do the light-dependent and light-independent cycles of photosynthesis depend on each other?

Making ConnectionsTogether

•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.

•Discovery – photosynthesis video

•Identify the reactants and products of the light-independent (Calvin) cycle in the video•Identify the location of the light-

independent (Calvin) cycle in the video

Objectives•Compare and contrast the light-

dependent and light-independent cycles of photosynthesis in terms of reactants and products

•Identify the location for the light-independent (Calvin cycle) for 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.

Exit Ticket•m.socrative.com•Room: stewart348