Photosystems
Studied by 0 people
Call with Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/6
There's no tags or description
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai |
|---|
No study sessions yet.
7 Terms
Where are photosystems found?
Embedded in the thylakoid membrane.
What does each photosystem comprise of?
An antenna complex: contains the photosynthetic pigments. Photosynthetic pigments are clustered together- a combination of pigments allows light at a range of wavelengths to be absorbed.
A reaction centre, within the antenna complex. The reaction centre contains the primary pigment, chlorophyll a.
What are the 2 types of photosystems?
Photosystem 1.
Photosystem 2.
Photosystem 1 has a maximum absorption at…
700nm.
Photosystem 2 has a maximum absorption at…
680nm.
What happens when light energy is absorbed by both photosystems?
Light energy is absorbed and is used to excite electrons which are transferred from chlorophyll a in the reaction centre to electron carriers embedded in the thylakoid membrane.
What happens as electrons pass from one electron carrier to another?
They lose energy.
As electrons pass from PSII to PSI, energy from the electrons is used to power proton pumps (ATP is formed).