General Photosynthesis
Steps of Photosynthesis
Cell Respiration vs. Photosynthesis
100
In what organelle does photosynthesis occur in?
Chloroplast
100
Photosynthesis can be broken up into 2 parts, name these parts and where they occur within the chloroplast.
1. Light dependent reactions
2. Light independent reactions / Carbon fixation
100
How does the chemical equation of cell respiration differ from photosynthesis?
They're essentially the opposite of each other, which reflects the functions of both metabolic pathways
Cell Respiration: C6H12O6 + 6O2 -> 6CO2 + 6H2O + Energy (ATP)
Photosynthesis: Light energy + 6CO2 + 6H2O -> C6H12O6 + 6O2
cell respiration is responsible for oxidizing/breaking down glucose for energy, while photosynthesis is responsible for using energy to synthesize glucose
200
Which kinds of organisms undergo photosynthesis?
- Plants
- Algae
- Photosynthetic bacteria / cyanobacteria
200
What is the first stage of the light dependent reaction?
Light harvesting stage
200
Which of these electron carriers are involved in cell respiration? Describe their oxidized and reduced form.
NAD+/NADH, FAD/FADH2, and NADP+/NADPH.
NADH and FADH2 are involved in cell respiration.
NAD+ is the oxidized form, NADH is the reduced form
FAD is the oxidized form, FADH2 is the reduced form
300
What is the chemical equation for photosynthesis?
Light + 6CO2 + 12H2O -> C6H12O6 + 6H2O + 6O2
300
What is the second stage of the light dependent reaction?
NADPH and ATP synthesis
300
Which molecule is responsible for helping plants trap sunlight energy during photosynthesis?
Chlorophyll
400
What is the primary electron carrier used in photosynthesis? What is the oxidized and reduced form of this carrier?
NADP+ / NADPH is the primary electron carrier in photosynthesis
Oxidized: NADP+
Reduced: NADPH
this is different from NADH electron carrier seen in cell respiration; NADPH has an extra phosphate group
400
What is the name of the cycle involved in the light independent reactions / carbon fixation? What takes place, generally?
Calvin cycle - NADPH and ATP are used to create precursor molecules of glucose
400
The gradient of which atom is responsible for powering ATP synthase to produce ATP in both photosynthesis and respiration?
H+
500
What are the products of the light dependent reactions? How are they used in the light independent reactions?
Light dependent reactions release ATP and NADPH that will be used to create sugar in the Calvin Cycle
500
Where do the light dependent and light independent reactions take place within the chloroplast?
Light dependent - thylakoid membrane
Light independent / Carbon fixation - stroma
500
T/F: A direct product of the Calvin Cycle is glucose
False - the Calvin cycle does not produce glucose, instead it produced glyceraldehyde-3-phosphate (G3P) which is a precursor molecule that can be used to create glucose
G3P -> glucose