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GeneralStructures

and Processes

Products Review the main Review the main concepts of concepts of

photosynthesis photosynthesis before your exam!before your exam!

Get a group and Get a group and play this lifeline-play this lifeline-jeopardy game!jeopardy game!

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In photosynthesis, _?_ energy is converted to _?_ energy.

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Light energy Light energy of the sun is of the sun is converted into converted into chemical energychemical energy

in organic molecules.in organic molecules.

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What’s the formula of photosynthesis?

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6CO2 + 6H2O => C6H12O6 + 6O2

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What are plant organelles responsible for photosynthesis?

Where are they located?

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ChloroplastsLocated in mesophyll cells

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What are the two major pigments within chloroplasts that are

responsible for the colored hues we see in plants?

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*Chlorophyll A & B = green *Carotenoids: carotene = orange and xanthophyll = yellow

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What are main structures in the chloroplast? What are their

functions?

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* Thylakoid Disk: a flattened membrane sack inside chloroplast that is used to convert light energy to chemical energy*Lumen: interior space of thylakoid disks *Grana: columns of thylakoid disks*Stroma: thick fluid that surrounds Grana

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What are the two parts (reactions) of photosynthesis?

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*Part 1: light dependent reaction*Part 2: light independent reaction(also called the Calvin cycle)

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Describe light dependent reaction Describe light dependent reaction and light independent reactionand light independent reaction

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*Part 1: light dependent reaction requires light to *Part 1: light dependent reaction requires light to provide the energy to start the process of provide the energy to start the process of breaking and making bonds. Breaks water into breaking and making bonds. Breaks water into oxygen, hydrogen, and electrons. Makes ATP and oxygen, hydrogen, and electrons. Makes ATP and NADPH.NADPH.

*Part 2: light independent reaction uses Calvin *Part 2: light independent reaction uses Calvin Cycle to make carbohydrates (sugar) for energy. Cycle to make carbohydrates (sugar) for energy. Requires ATP and NADPH for energy.Requires ATP and NADPH for energy.

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Cyclic photophosphorylation of Cyclic photophosphorylation of the light-dependent reaction the light-dependent reaction

occurs in which photosystem?occurs in which photosystem?

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Photosystem I (P700)

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How many turns of the Calvin cycle does it take to produce

the 3-carbon molecules?

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3 turns

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Light delivers packets of Light delivers packets of energy called _?_ to energy called _?_ to

Photosystem II (PS2)Photosystem II (PS2)

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Photons

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Energy is absorbed and dispersed Energy is absorbed and dispersed in a “domino effect” by the in a “domino effect” by the

pigments in PS2 until it reaches pigments in PS2 until it reaches PS2’s _?_PS2’s _?_

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Reaction Center

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ATP and NADPH products of ATP and NADPH products of Photosystem 1 are ready to enter Photosystem 1 are ready to enter

the _?_the _?_

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Calvin cycle (light-Calvin cycle (light-independent)independent)