Q2: Photosynthesis pt. 1 Flashcards
True or False:
In photosynthesis, oxygen is reduced to water.
false
water is oxidized into oxygen
True or False:
In photosynthesis, water is oxidized and oxygen is released.
True
True or False:
In the leaf, the most abundant site where chlorophyll is found is the bottom of the leaf.
false
Organisms that use the pigment chlorophyll to harvest solar energy to produce the stored energy as chemical bonds of ATP and carbohydrates.
autotrophic organisms
Three essential processes involved in photosynthesis
- Energy absorption from sunlight via pigments during light-dependent reaction
- Reactivation of reaction center
- Carbohydrates production by carbon fixation during dark reaction.
In photosynthesis, energy from ________ is harvested and used to drive the synthesis of ________ from ________ and ________.
- sunlight
- glucose
- CO₂
- H₂O
The ultimate source of metabolic energy for all biological systems.
photosynthesis
Two stages of photosynthesis
- light reactions (light-dependent reaction)
- dark reactions (light-independent reactions, otherwise known as the Calvin Cycle)
In the light reactions, energy from sunlight drives the synthesis of ________ and ________, coupled to the formation of ________ from H₂O.
- ATP
- NADPH
- O₂
In the dark reactions, the ATP and NADPH produced by the light reactions drive ________ synthesis.
glucose
Where does photosynthesis occur in eukaryotic cells?
chloroplasts
Where does the light reaction occur?
thylakoid membranes
Where does the dark reaction occur?
stroma
This reaction use sunlight to initiate electron transfer, thereby reducing NADP+ to NADPH and splitting water to give off oxygen as a by-product.
light reaction
It is sometimes referred to as ‘dark reactions’ because it does not require light energy for its processes to take place.
Calvin Cycle
