Test 2 PHOTOSYNTHESIS Flashcards
(24 cards)
Mesophyll cells
Where photo. Really happens
Waxy cuticle
Prevents H20 loss
Epidermis
In cross section of of leaf, below waxy cuticle, above mesophyll cells
Stomata
Pores in epidermis that allow 02 to go out and CO2 to go in
Stem
Has 2 vascular tissues: xylem & pholem
Xylem
Transports H2O throughout the plant
Phloem
Transports sugar throughout the plant
Roots
Organ that absorbs water and anchors the plant
C02+H20 –> C6H12O6 + O2
(R) (P)
Photosynthesis Reaction
Name the parts of chloroplast
Chlorophyll (pigment)
Stroma (cytoplasm like)
Thylakoid (one disc)
Granum (stack of discs)
Where does LDR take place in chloroplast?
Membrane of thylakoid
Where does LIR take place in chloroplast?
stroma
Is sugar produced in LIR or LDR?
LIR
Steps of LIR
CO2 combines with RUBP
Goes through series of transf.
Forms glucose (6 turns to make it)
LDR steps
Photolysis (sun splits h2o)
(H+ ; 02 ; e’s)
e’s fill void in P680 -> electron acceptor -> ETS -> P700 -> EA -> ETS -> e’s accepted by NADP+ -> NADP+ picks up H+ and becomes NADPH
02 goes into atmosphere
ETS
Electron transport system
Series of acceptor molecules that accept and donate electrons given off by chlorophyll
Input and output of LDR
H20
H+ ( gets picked up by NADP+)
02 ( atmosphere)
e’s ( fill p680 go through EA & ETS ; picked up by NADP+)
LIR INPUT AND OUTPUT
Input- CO2 & RuBP
Output- glucose
Role of chlorophyll P680/P700
Located in thylakoid
Filled by e’s
Photolysis
Sun light splits water in LDR
Role of ADP and ATP in photosynthesis
Generated from e’s passing down the ETS and giving off energy
Role of Coenzymes (NADP+)
A nucleotide that helps the reaction take place; acts as a shuttle
Role of RuBP in LIR
5 carbon sugar already in chloroplast
Combines with CO2 to form glucose
Importance of photosynthesis
Only plants can make Carbon into a usable form that all life depends on and gives off oxygen
