u3: photosynthesis Flashcards
(10 cards)
1
Q
define photosynthesis
A
conversion of light energy, CO2, and water into high energy compounds (glucose)
2
Q
photosynthesis rxn equation
A
6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂
3
Q
where does photosynthesis take place in a plant
A
chloroplasts
4
Q
layers of a leaf
A
- cuticle
- upper epidermis
- palisade mesophyll (long)
- spongy mesophyll (circles)
- stoma + guard cells
- vascular bundle (pink is xylem, purple is phloem)
- lower epidermis
5
Q
where do the raw materials for photosynthesis come form in the leaf?
A
- light: enters plant cells from top (passes through cuticle)
- water: absorbed by plant roots, delivered to leaf via vascular bundle (xylem)
- CO2: goes into leaf via stoma
6
Q
what does phloem transport?
A
sugar
7
Q
what are the important structures inside the chloroplast
A
- thylakoids
- stRoma
8
Q
what takes place in the thylakoids
A
light reactions
9
Q
what takes place in the stRoma
A
calvin cycle
10
Q
why are plants green?
A
- chlorophyll (pigment) in chloroplasts
- chlorophyll absorbs red-orange and blue-violet, but not green wavelengths
- so, green wavelengths reflected to us
