What is the purpose of photosynthesis - make sugar for cellular respiration
How does cellular respiration compare to photosynthesis? - Photosynthesis
... [Show More] is the flip opposite of cellular respiration
Photoautotroph - self-feeding organism that uses light energy from the sun
some are prokaryotes
plants
some are protists
what do SOME protists and plant cells have when they are photoautotrophs? - Chloroplasts
what makes chloroplasts green? - chlorophyll
what is chlorophyll? - green pigment that captures light energy
What type of energy is light energy? - kinetic energy
what is light described and measured in? - wavelength
What is the main pigment for photosynthesis? - chlorophyll a
what are some "accessory" also present in many cells? - chlorophyll b
carotenoids
what are some functions of accessory pigments? - they absorb the same kinds of light as chlorophyll a to power photosynthesis
they are also a sunscreen to protect against damaging light.
What does light energy do to the pigment molecules? - IT EXCITES THEM!
what do excited electrons have more of when light energy excites them? - Chemical energy
so, excited electron = - POWER
6CO2 + 12H2O --> C6H12O6 + 6O2 + 6H20
change in G= 686 kilograms - PHOTOSYNTHESIS
highly endergonic
oxidation reduction reaction
Where does photosynthesis take place - Chloroplasts
light reaction part of photosynthesis - occurs in thylakoids
produces chemical energy from the to power the calvin cycle
has an electron carrier NADP+ which turns into NADPH when it has excited electrons
calvin cycle - occurs in stroma and is light dependent
produces sugar
powered by electrons and ATP from light reactions
what is the sugar that is produced by the clavin cycle - glyceraldehyde 3-phosphate
Light reactions - 1.) Linear electron flow
2.) 1st ETC
3.) Chemiosmosis
4.) ATP synthase
what is converted in the light reactions - H20---> O2
kinetic energy to chemical energy
-electrons and ATP come from H2O
H2O GETS OXIDIZED
what captures the light in the thylakoid membrane and what for? - photosystems and to excite electrons.
What are the two complexes in a photosystem - light-harvesting complex
reaction center complex
what does a light-harvesting complex have - chlorophyll a and accessory pigments
what does the reaction center complex have - chlorophyll a and a primary electron acceptor
The light reactions - two photosystems:
-photosystem I
-photosystem II
and they have the exact same structure and do the same thing at the same time.
electrons move through photosystem through - linear electron flow
electrons flow from H2O--> O2 [Show Less]