Photosynthesis Flashcards
(21 cards)
What is the full equation of phtosynthesis ?
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
What are the four necessary factor for photosynthesis ?
(1) Carbon dioxide
(2) Water
(3) light
(4) chlorophyll
What is the mode of nutrition of plants ?
autotrophic
How to test for starch in leaf ? What can be observe with a positive result ?
Iodine test. The solution turns from brown to blue-black.
Photosynthesis
Why a leaf is boiled before demostrating the iodine test ?
(1) kill leaf cells
(2) break cell membrane
Photosynthesis
Why alcohol is used when testing for starch ?
(1) decolourize the leaf
(2) dissolve chlorophyll
What test should be used to test for the presence of oxygen ? What positive result should be observe ?
Glowing Splint.
Glowing Splint relights.
What are the two features of cuticle for photosynthesis ?
(1) thin waxy layer : reduce water loss
(2) Transparent : allow light penetrate
What are the two features of Epidermis for photosynthesis ?
(1) closely fitted epidermis cells layer: protection
(2) transparent: allow light penetrate
What are the two features of Stomata for photosynthesis ?
(1) small pores: allow gas exchange
(2) few stomata on upper surface: reduce water loss by transpiration
What are the two features of guard cells fro photosynthesis ?
(1) kidney-shaped cells around each stomata: control size of stomata to regulate gas exchange
(2) contain many chlorophyll: carry out photosynthesis
What are the functions of envelope ?
a double membrane that bound the chloroplast.
(1) regulate passage of material
(2) extends inward to form a network of thylakoids
What are the functions of thylakoid and granum ?
each thyakoid is disc-shaped membranous sac.
thylakoid stack together become granum.
(1) provides large surface area
(2) for the attachment of photosynthetic pigments without taking up too much space.
What are the functions of intergranal thylakoids?
transportation of product of photosynthesis.
What are the functions of stomata ?
(1) contains enzymes for arbon fixation.
(2) contains starch grains and oil droplets as storage of product of photosynthesis.
What are the two stages of photosynthesis ?
(1) photochemical reactions
(2) calvin cycle
photochemical reaction is light dependent.
Where is the site of photochemical reaction ?
Thylakoid in chloroplast.
What is the four process included in photochemical reaction ?
(1) light absorption
(2) photophosphorylation by ATP synthesis
(3) photolysis of water
(4) production of reducing agent
How many electrons are given out by chlorophyll in light absorption ?
2
