Group 9: Photosynthesis: Light Reaction Flashcards
What are the two parts of photosynthesis?
Light-dependent and Light-Independent (Calvin Cycle)
Where does the light-dependent reaction take place?
thylakoids
Where does the light-independent reaction take place?
stroma
Where does photosynthesis occur?
chloroplasts
It is a type of plastid—a round, oval, or disk-shaped body that is
involved in the synthesis and storage of foodstuffs.
Chloroplasts
What do Chloroplasts produce?
- NADPH
- Molecular Oxygen (O2)
- ATP
is a pigment or a chemical compound that absorbs and reflects
specific wavelengths of light.
Chlorophyll
(Parts of the Chloroplast)
is a semi-porous membrane that is permeable to small molecules
and ions, which diffuses easily.
Outer Membrane
(Parts of the chloroplast)
it is present between the outer and the inner membrane of the
chloroplast.
Intermembrane Space
(Parts of Chloroplast)
It regulates the passage of materials in and out of the chloroplast. Forms a border to the
stroma.
Inner Membrane
(Parts of Chloroplast)
A system that is suspended in the stroma. Is a
collection of membranous sacs called thylakoids.
Thylakoid System
How many thylakoids does each granum contain?
10-20 Thylakoids
(Parts of Chloroplast)
Is a colorless, alkaline, aqueous, protein-rich fluid present within the inner
the membrane of the chloroplast surrounding the grana.
Stroma
(Part of chloroplasts)
Is the collective term for the stack of thylakoids within the chloroplast of plant
cells. You can call if grana if it is plural.
Granum
(Parts of Chloroplast)
Is a membrane-defined space that is found inside several organelles, cellular
components, or structures: thylakoid, endoplasmic reticulum, Golgi apparatus,
lysosome, mitochondrion, or microtubule.
Lumen
(Parts of Chloroplast)
It connects thylakoids of two different grana; they are also known as
stroma thylakoids. Thus, they ensure that maximum energy from sunlight is captured in
photosynthesis.
Stroma Lamellae
What are the two types of Photosystem?
Photosystem II ( water-plastoquinone oxidoreductase) and Photosystem I (plastocyanin- ferrodoxin oxidoreductase)
What is the by-product in Photosystem II?
O2 or Oxygen
What are the products of PSI and PSII?
ATP and NADPH
This Photosystem is maximally excited
by light at longer wavelengths. (P700)
Photosystem I
This Photosystem is maximally
excited by shorter wavelengths. (Less
the 680)
Photosystem II
Where is Photosystem I located?
Outer surface of the thylakoid membrane
Where is Photosystem II located?
On the inner surface of the thylakoid membrane
In which system does photolysis occur?
Photosystem II
What is the primary function of Photosystem I?
The primary function of the PS I is in NADPH synthesis, where it receives the electrons from PS II.
What is the primary function of Photosystem II?
The primary function of the PS II is in the hydrolysis of water and ATP synthesis.
What is the core composition of PS I?
The PSI is made up of two subunits which are psaA and psaB.
What is the core composition of PS II?
The PS II is made up of two subunits made up of D1 and D2.
What are the two ways to generate ATP?
- ) Non cyclic photophosphorylation
2. ) Cyclic photophosphorylation
What receives the electron during Photosystem II?
Electron Acceptor
