Photosynthesis Bio test 10/25/2024 Flashcards
Photosynthesis
in what organelle does photosynthesis occur?
Chloroplasts
What are the two different reactions in Photosynthesis?
light-dependent and light-independent
What is the main pigment responsible for gathering the sun’s energy during photosynthesis
Chlorophyll
what is the chemical equation for photosynthesis?
6CO^2 + 6H^2O → C^6H^12O^6 + 6O^2.
why do we need plants?
we cant make our own energy
and…
they are the first level of the food chain
where do light-dependent reactions take place in the chloroplast?
thylacoide
what is the molecule that stores energy for the cells?
ATP
what is the molecule that serves as a “carrier” for high energy electrons?
NADP+
are plants the only organisms that can go through photosynthesis?
no because bacteria has this occur as well
where do light-independent reactions take place in the chloroplast?
stroma
what cycle is light-dependent?
Calvin cycle
what comes out of light-dependent?
oxygen and ATP
what comes in light-dependent?
water and sunlight
what is the stroma?
region outside the thylakoid membrane, where the light-independent reactions occur.
what comes out of light-independent?
glucose sugar
what comes in light-independent?
carbon dioxide and ATP
autotroph
An organism that can make its own food
heterotroph
An organism that gets its energy by eating other organisms
reactants
The ‘inputs’ of a chemical reaction. Located on the left side of a chemical equation. (ie- the ingredients)
products
The ‘outputs’ of a chemical reaction. Located on the right side of a chemical equation. (ie- whats made) (cake)
stomata
Small openings on the underside of a leaf through which oxygen and carbon dioxide can move. Where gas exchange occurs in a plant.
chlorophyll
Green pigment which ‘fills’ chloroplast. This pigment captures sunlight.
photosynthesis
Conversion of light energy from the sun into chemical energy (stored in glucose).
chloroplast
Double membrane-bound organelle that is the site where photosynthesis occurs.
leaves job
Collect sunlight and contain the chloroplasts which produce food
Photosynthesis Reactants
carbon dioxide, water, and sunlight
Photosynthesis Products
oxygen and glucose
Glucose (C6H12O6)
A simple sugar produced by plants through photosynthesis and used as food.
Thylakoid
A flattened membrane sac inside the chloroplast, used to convert light energy into chemical energy through the light dependent stage
Stroma
gel-like region outside the thylakoid membrane of the chloroplast where the light independent reaction occurs
light-dependent reactions
1st part of photosynthesis that takes place in the thylakoid and that captures energy from sunlight.
Light Independent Reactions (Calvin Cycle)
2nd stage of photosynthesis, occurs in stroma and produces glucose
Pigments
light absorbing molecules in plants
Granum
A stack of thylakoids in a chloroplast
Photoautotrophs
Organisms that use light as a source of energy to create food
guard cells
Cells that control the opening and closing of stomata on leaves
Transpiration
Evaporation of water from the leaves of a plant
Carotene
yellow-orange pigment
Chemosynthesis
process in which chemical energy is used to produce carbohydrates
