photosynthesis Flashcards
where does photosynthesis occur?
in the chroloplastt, the structures within the chroloplast are the sites of different stages.
What is stage 1? where?
capturing light energy, happens in the thylakoid.
what and where is stage 2?
Making ATP and NADD+, this happens in the thylakoid membrane
What is stage 3? where?
synthesis of organic compounds (glucose), this happens in the stroma
true or false: the first two stages of photosynthesis require light
true
what are the first two stages often refeared to as?
light-dependant reactions
the first two stages…
- require chlorophyll and other pigments
- occurs in the thylakoid membrane
- this its where light energy is absorbed and converted into usable form
- This is where ATP and NADPH are made
true or false: the Calvin cycle is light dependant
false; the Calvin Cycle is a light-independent reaction
what is reduction?
Gain of electron (oxygen)
what is oxidation?
gain of electron (oxygen)
where does the Calvin cycle occur?
in the Stroma
what does the Calvin cycle do?
it incorporates the carbon of CO2 into carbohydrate moleucules
summaries stages 1 and 2
The light reactions in the Thylakoid membrane produce O2 , ATP and NADPH
summarise stage 3 (Calvin cycle)
The Calvin cycle in the stroma uses CO2, ATP, and NADPH to make carbohydrates such as glucose
what are the three steps to light dependant reactions?
photexcitation
Electron transport
Chemiosis
what is Photexcitation?
this is when light energy is given to the electrons of the photosystems
what is electron transport
where electrons move through enzymes, pushing hydrogen across
what is chemiosmosis
process where hydrogen is used to make ATP
what are the two photosystems plants use?
Photosystem I (p 700) and Photosystem II (p680)
True or false: Each photosystem has an antenna complex and a reaction centre
true
what is an antenna complex composed of?
Chlorophyll molecules and other accessory pigments that will capture the energy from light and then transfer it to chlorophyll a
what is the reaction centre?
a protein complex that contains chlorophyll and the final electron accepter.
