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Anoxygenic | Definition of Anoxygenic by Merriam …

3. The purple bacteria carry out anoxygenic photosynthesis. They use reduced molecules such as H2, H2S, S, and organic molecules as an electron source and generate NADH and NADPH. The photosynthetic system is located in spherical or lamellar membrane systems that are continuous with the cytoplasmic membrane.

2. The green bacteria carry out anoxygenic photosynthesis. They use reduced molecules such as H2, H2S, S, and organic molecules as an electron source and generate NADH and NADPH. The photosynthetic system is located in ellipoidal vesicles called chlorosomes that are independent of the cytoplasmic membrane.

Anoxygenic - Biology-Online Dictionary

Anoxygenic photosynthesis - Wikipedia

anoxygenic photoautotroph c.

1. Autotrophs are organisms that are able to synthesize organic molecules from inorganic materials.
2. Photoautotrophs absorb and convert light energy into the stored energy of chemical bonds in organic molecules through a process called photosynthesis.
3. Plants, algae, and cyanobacteria are known as oxygenic photoautotrophs because they synthesize organic molecules from inorganic materials, convert light energy into chemical energy, use water as an electron source, and generate oxygen as an end product of photosynthesis.
4. Green and purple bacteria, are known as anoxygenic phototrophs that do not use water as an electron source and, therefore, do not evolve oxygen during photosynthesis. The electrons come from compounds such as hydrogen gas, hydrogen sulfide, and reduced organic molecules.
5. Oxygenic photosynthesis is composed of two stages: the light-dependent reactions and the light-independent reactions.
6. The light-dependent reactions convert light energy into chemical energy, producing ATP and NADPH.
7. The light-independent reactions use the ATP and NADPH from the light-dependent reactions to reduce carbon dioxide and convert the energy to the chemical bond energy in carbohydrates such as glucose.
8. Light and other types of radiation are composed of individual packets of energy called photons. When photons of visible light energy strike certain atoms of pigments during photosynthesis, that energy may push an electron from that atom to a higher energy level where it can be picked up by an electron acceptor in an electron transport chain.
9. In eukaryotic cells, photosynthesis takes place in organelles called chloroplasts.
10. The inner membrane of a chloroplast encloses a fluid-filled region called the stroma that contains enzymes for the light-independent reactions of photosynthesis.
11. Infolding of this inner membrane forms interconnected stacks of disk-like sacs called thylakoids. The thylakoid membrane, which encloses a fluid-filled thylakoid interior space, contains chlorophyll and other photosynthetic pigments as well as electron transport chains. The light-dependent reactions of photosynthesis occur in the thylakoids.
12. The overall reaction for photosynthesis is as follows: 6 CO2 + 12 H2O in the presence of light and chlorophyll yields C6H12O6 + 6 O2 + 6 H2O.

Autotrophs are organisms that are able to synthesize organic molecules from inorganic materials. Photoautotrophs absorb and convert light energy into the stored energy of chemical bonds in organic molecules through a process called photosynthesis.

anoxygenic photosynthesis Flashcards | Quizlet

Plants. algae, and bacteria known as cyanobacteria are known as oxygenic photoautotrophs because they synthesize organic molecules from inorganic materials, convert light energy into chemical energy, use water as an electron source, and generate oxygen as an end product of photosynthesis. Some bacteria, such as the green and purple bacteria, are known as anoxygenic phototrophs. Unlike the oxygenic plants, algae, and cyanobacteria, anoxygenic phototrophs do not use water as an electron source and, therefore, do not evolve oxygen during photosynthesis. The electrons come from compounds such as hydrogen gas, hydrogen sulfide, and reduced organic molecules. In this section on photosynthesis, we be concerned with the oxygenic phototrophs.

In this section we will concentrate on oxygenic photosynthesis. Oxygenic photosynthesis is composed of two stages: the light-dependent reactions and the light-independent reactions.

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oxygenic photosynthesis - Definition


Define the process of photosynthesis

As mentioned above, photoautotrophs use sunlight as a source of energy and through the process of photosynthesis, reduce carbon dioxide to form carbohydrates such as glucose. The radient energy is converted to the chemical bond energy within glucose and other organic molecules.

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