Lesson 1- Chloroplast Ultrastructure Flashcards
What type of membrane does the chloroplast have
Double Membrane
What structures link the grana
Lamellea
What is found within the stroma
Starch and enzymes
Where does the light dependant reaction stage of photosynthesis take place
Thylakoid membrane
Where does the light independent stage of photosynthesis take place
Stroma
What structural features of the chloroplast increase rate of photosynthesis
Stacked into grana- increased surface area
Layering of membrane allows a lot of pigment
Permeable membrane allows diffusion of gases
Stroma contains enzymes for the LIR
What is found within the inner chloroplast membrane
Contains many membrane bound transport proteins to control the passage of substances in and out of the chloroplast
Describe the outer chloroplast membrane
It is freely permeable to molecules such as CO2 and H2O but not large proteins
What is a thylakoid disc
A system of interconnected, flattened fluid filled sacs with proteins embedded in the membranes
What is the function of a starch grain
Stores the product of photosynthesis
Describe the stroma
Gel-like fluid surrounding the thylakoids. Contains all the enzymes, sugars and organic acids needed for the light dependent reactions.
Why do thylakoids have a large surface area?
To allow as much light energy to be absorbed as possible
What is the function of the stroma
Fluid matrix inside a chloroplast, contains enzymes for light dependent stage
What is the function of the thylakoid space?
Contains photosynthetic pigments and enzymes for light dependent reactions
Why are lots of ATP synthase enzymes present in the thylakoid membranes?
To produce ATP in the light dependent reaction
