3. Photosynthesis is an enzyme-regulated
anabolic process of manufacture of
organic compounds inside the
chlorophyll-containing cells from carbon
dioxide and water with the help of
sunlight as a source of energy.
Photosynthesis takes place in the green
leaves of plants and other parts of plants
like stem etc.
4. Photosynthesis is an enzyme-regulated anabolic process of manufacture of organic
compounds inside the chlorophyll-containing cells from carbon dioxide and water
with the help of sunlight as a source of energy. Photosynthesis takes place in the
green leaves of plants and other parts of plants like stem etc.
5. Photosynthesis is an enzyme-regulated anabolic process of manufacture
of organic compounds inside the chlorophyll-containing cells from
carbon dioxide and water with the help of sunlight as a source of energy.
Photosynthesis takes place in the green leaves of plants and other parts of
plants like stem etc.
6. The former set of reactions, since they
are directly light-driven are called light
reactions. The latter are not directly
light-driven but are dependent on the
products of light reactions (ATP and
NADPH). Hence, to distinguish the
latter they are called by convention,
dark reactions. However, this should
not be construed to mean that they
occur in darkness or that they are not
light-driven.
9. Types Formula Light Absorb Found in
Chlorophyll
Chlorophyll a Blue, Yellow & Red All green plants except Bacteria
Chlorophyll b Blue & Orange
All green plants except blue green
algae & bacteria
Chlorophyll c Blue & Orange
Brown algae diatoms and
pyrrophyta & cryptophyta
Chlorophyll d Blue, Yellow & Red Red algae
Chlorophyll e Not known Blue & Red Xanthophyta
Bacteriochlorophyll a UV, Violet & Yellow All photosynthetic bacteria
Bacteriochlorophyll b -------- Red Rhodopsedomonas
Chlorobium chlorophyll -------- -------- --------
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10. Types Formula Light Absorb Found in
Carotenoids
Carotene Blue & Violet
All plants in non green parts
Xanthophyll Blue & Violet
Phycobilin
Phycoerythrin -------- Yellow & Green Red algae
Phycocyanin -------- Orange & Green Cyanobacteria
Allophycocyanin -------- Orange & Red --------
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17. S.no. Photosystem I Photosystem II
1 The system is located in the nonappresed part of
grana thylakoids as well as stroma thylakoids.
Photosystem II is present in the appresed part of
grana thylakoids.
2 Chlorophyll : carotenoid content is high. Chlorophyll to carotenoid ratio is low.
3
Chlorophyll a content is more than twice that of
chlorophyll b.
Chlorophyll a and chlorophyll b are approximately
equal.
4
5 It receives electrons from Photosystem II. Electrons are received from photolytic reaction.
6 Photosystem I can perform cyclic
Photophosphorylation independently.
It performs non-cyclic Photophosphorylation in
conjunction with Photosystem I.
7 It is not connected with Photolysis of water. Photosystem II is connected with Photolytic
oxidation of water.
8 Usually, it hands over its electron to NADP. Usually, it hands over its electrons to PSI.
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