Plant phys exam 1

Electron transport chain in photosynthesis

P680, pheophytin, plastoquinones, plastohydroquinones, cytochrome b6f complex, plastocyanin, P700, NADPH

What is the casparian strip

Embedded within the endodermis of cell walls of plants and is made of suberin. It makes sure that water and other substances cannot pass through the cell walls passively. The endodermis filters water before it enters the vascular tissue

Pathways of water movement

apoplast pathway - the movement of water through cell walls. Is blocked by the casparian strip.

Symplast pathway - the movement of water through symplast or common cytoplasm. Water moves through plasmodesmata.

Transmembrane pathway - water moves through cell walls and in cytoplasm.

what is the structure of a chlorophyll

They have a complex ring structure with loosely bound electrons such as nitrogen and magnesium. They also have a long hydrocarbon tail that allows them to be embedded within the membranes associated with photosynthesis.

The four ways chlorophyll can reach ground state

Emitting a photon (The cause of fluorescence)

Emitted as heat to the surrounding environment

Participation in energy transfer (Resonance energy transfer, energy is given to an energy acceptor molecule)

Photochemistry (Photosynthesis)

Thylakoid membrane

Thylakoids have a membrane where photosynthetic pigments are embedded. Also in this membrane are proteins associated with energy transfer and proteins associated with ATP synthesis

Antenna complex

arrangement of 200-300 pigment molecules that allow for photochemistry to occur. These pigments funnel light energy towards the reaction center.