Part 2 Flashcards
What happens between 500 and 600 nm of light?
That light is not being absorbed (because it is green)
What are accessory pigments and how do they help the light reaction?
They help harvest energy and they are pigments outside of Chlorophyll that reflect colors like red, orange, and yellow
Carotenoids are the main ones which are like orange
Xanthophylls we also have which are yellow
Chlorophyll pigments absorb primarily what wavelengths/colors?
400 nm to 500 nm, which is blue and purple (main jump)
625 nm to 675 nm, which is red and orange (2nd jump)
When do the guard cells of the stomata swell and when do they shrink?
They swell to open up to accept water
They shrink to close so excess O2 does not get in
What is photorespiration and why is it bad?
Plants in a drought have to keep their stomata closed to keep in water and so they don’t get enough CO2 which the calvin cycle needs
basically because there is no new source of carbon, so photorespiration is when plants use O2 to power the calvin cycle –>
the plant takes a net loss of carbon everytime they run the cycle and so there’s no sugar made for energy and the plant just dies
C4 plants: near the ecuator plants, desert plants
Ecuator plants have adapted to have an alternative calvin cycle
Desert plants only open the stomata at night, where its cooler so less water will evaporate
C3 plants are more suited for cooler climates like rice and potato, while C4 is for dryer hotter ones like sugarcane
Chlorophyll absorbs _________ and ____ wavelengths the best?
blue-violet and red
The process of photosynthesis occurs in the _________ of a plant?
the chloroplast
The light dependent reaction happens in the _______________ while the Calvin Cycle happens in the __________.
Thylakoid
Stroma
Stacks of thylakoids inside the chloroplast is called the _____.
granum
CO2 end up as a part of _______.
glucose
ATP and NADPH are made during the _________ reaction.
light-dependent
NADP+ and ADP are sent back to the ____________ reactions after being used to make sugar in the Calvin Cycle. They’re like shuttle busses.
sent back to the light dependent reactions for ADP to be an electron carrier and NADP+ to be the final electron acceptor
and then to be eventually reduced to make NADPH and phosphorylationized to make ATP for the calvin cycle
How does NADP+ become NADPH and where?
How does ADP become ATP and where?
In PS1, the pumped protons (H+) and electrons reduce NADP+ to NADPH
Okay so light enery is absorbbde in the form of chemical energy ATP the ATP is then broken down by the ATP synthase to make ADP, and then the ADP is bound to the synthase but the proton gradient drives ADP to be phosphorlyationized by the synthase to become ATP ( the synthase is charged by the energy of the protons)
