Flashcards in Photosynthesis Chapter 5 Summary Deck (45)
Converts kinetic energy in light to potential energy in the covalent bonds of glucose
3. Some microorganisms
Photosynthesis builds what from what
Builds carbohydrates from carbon dioxide and water
What type of reaction is P/S
REdox reaction of P/S
Water = oxidized ( looses an electron when split by chlorophyll to replace its own lost electron)
Carbon dioxide = reduced ( gains electron from Nadph)
Why do plants need glucose
1. To generate ATP
2. nourish non-photosynthetic parts of the plant.
3. Produce cellulose
4. other biochemicals
Most plants store Excess glucose as
Explain the evolution of Photosynthesis
Before photosynthesis evolved, organisms were heterotrophs that relied on organic molecules as a carbon source.
The first autotrophs developed the ability to produce their own organic molecules from atmospheric Co2.
Oxygen produced by these organism changed the Earth's climate
A small part of the Electromagnetic Spectrum
Packets of energy that move in waves.
Effect of wave length and kinetic energy
The longer the wavelength the less kinetic energy per photon
Photosynthetic pigments do what
Capture Light Energy
2 types of pigments found in chloroplasts
1. Chlorophyll a
2. accessory Pigments
The primary photosynthetic pigment-- Reaction Center ( along with proteins)
absorb wavelengths of light that chlorophyll a cannot absorb, extending the range of wavelengths useful for P/S
The sites of P/S
Pores where plant exchange gases with the environment through ( take in co2 and release O2)
collective term for the internal cells of the plant.
gelatinous matrix in the chloroplast ( outside the thylakoid membrane.
Site of light reaction. assembled in stacks in the the stroma.
Grana ( granum singl. )
Stacks of thylakoid membrane
Where are the pigments embedded
In the Thylakoid membrane
1. Antenna Pigments
2. Reaction Center ( chlorophyll a)
2 stages of P/S
1st. Light Reaction ( light dependent)
2nd. Carbon Reaction ( Light independent)
The 2 main products of Light Reaction needed by the 2nd stage
The use of ATP and NADPH for Carbon Reaction
They provide energy and electrons for the glucose producing carbon reaction
Photosystem II produces
Photosystem ! Produces
THE 2 STAGES OF LIght Reaction