Question:
What is true for cyanobacteria
What is true for cyanobacteria
Updated On: June 02, 2025
- oxygenic with nitrogenase
- oxygenic without nitrogenase
- non oxygenic with nitrogenase
- non oxygenic without nitrogenase.
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The Correct Option is A
Solution and Explanation
Cyanobacteria are gram negative prokaryotes which are popularly known as blue-green algae. Although cyanobacteria are true prokaryotes, but their photosynthetic system closely resembles with that of Biological Classification eukaryotes because they have chlorophyll a and photosystem II and they carry out oxygenic photosynthesis. Like the red algae, cyanobacteria use phycobi Iiproteins as accessory pigments. Photosynthetic pigments and electron transport chain components are located in thylakoid membranes lined with particles called phycobilisomes, which contain phycobilin pigments, particularly phycocyanin and transfer energy to photosystem II. They contain nitrogenase enzyme for nitrogen fixation. This enzyme becomes inactive in the presence of oxygen but the thick walled heterocysts provide suitable anaerobic enviomment for nitrogenase activity even in aerobic conditions.
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NEET Notification
Concepts Used:
Mineral Nutrition
The naturally occurring inorganic nutrient found in the soil and food that is necessary for the proper functioning of animal and plant bodies is defined as nutrition. Minerals are vital elements essential for the body.
Read More: Mineral Nutrition
Role of Nutrients:
- Balancing function
- Maintenance of osmotic pressure
- Influencing the pH of the cell sap
- Construction of the plant body
- Catalysis of the biochemical reaction
- Effects of Toxicity