What is the difference between quantasome and photosystem?
What is the difference between quantasome and photosystem?
Quantasomes are particles found in the thylakoid membrane of chloroplasts in which photosynthesis takes place. They occur in 2 sizes: the smaller quantasome is thought to represent the site of photosystem I, the larger to represent the site of photosystem II.
What is the meaning of quantasome?
Definition of quantasome : a chlorophyll-containing spherical granule found in the grana of chloroplasts.
What is a photosystem and where are they found?
Photosystems are the functional units for photosynthesis, defined by a particular pigment organization and association patterns, whose work is the absorption and transfer of light energy, which implies transfer of electrons. Physically, photosystems are found in the thylakoid membranes.
How many Thylakoids are in a Granum?
100 thylakoids
When more than one thylakoid joint and build a stack that looks like the stack of coins, is known as granum or grana. A minimum of 10 to a maximum of 100 thylakoids are required to build a granum.
What is Z scheme?
The Z-scheme is an energy diagram for electron transfer in the “light reactions” of plant photosynthesis. It applies equally well to photosynthesis by algae and cyanobacteria. The vertical energy scale shows each molecule’s ability to transfer an electron to (i.e., to reduce) the next one from left to right.
What is the light-harvesting center?
The light-harvesting complex (or antenna complex; LH or LHC) is an array of protein and chlorophyll molecules embedded in the thylakoid membrane of plants and cyanobacteria, which transfer light energy to one chlorophyll a molecule at the reaction center of a photosystem.
Where does Calvin cycle take place?
stroma
Overview of the Calvin cycle This process is fueled by, and dependent on, ATP and NADPH from the light reactions. Unlike the light reactions, which take place in the thylakoid membrane, the reactions of the Calvin cycle take place in the stroma (the inner space of chloroplasts).
Where does light reaction take place Class 11?
chloroplasts
Light reaction of photosynthesis takes place in the thylakoids of the chloroplasts. During this process, the water molecule is splitted into oxygen, protons, and electrons. These protons and electrons are then transferred through the thylakoid membrane to produce energy storage molecules i.e., ATP and NADPH. >
What is the reaction center of a photosystem?
The heart of photosystem II is the reaction center, where the energy of light is converted into the motion of energized electrons. At the center is a key chlorophyll molecule. When it absorbs light, one of its electrons is promoted to a higher energy.
How does a photosystem work?
Photosystems are structures within the thylakoid membrane that harvest light and convert it to chemical energy. Each photosystem is composed of several light-harvesting complexes that surround a reaction center.
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