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Questions and Answers
What is the characteristic of eubacteria?
What is the characteristic of eubacteria?
- They lack a cell wall
- They are motile without a flagellum
- They have a flexible cell wall
- They have a rigid cell wall and a flagellum if motile (correct)
What type of autotrophs are cyanobacteria?
What type of autotrophs are cyanobacteria?
- Heterotrophic
- Photosynthetic (correct)
- None of these
- Chemosynthetic
What is the role of chemosynthetic autotrophic bacteria in the environment?
What is the role of chemosynthetic autotrophic bacteria in the environment?
- They form blooms in polluted water bodies
- They fix atmospheric nitrogen
- They decompose organic matter
- They oxidise various inorganic substances and recycle nutrients (correct)
What type of cells do some cyanobacteria use to fix atmospheric nitrogen?
What type of cells do some cyanobacteria use to fix atmospheric nitrogen?
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Which type of bacteria are most abundant in nature?
Which type of bacteria are most abundant in nature?
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Study Notes
Characteristics of Eubacteria
- Eubacteria are characterized by their peptidoglycan cell wall and lack of membrane-bound organelles.
Autotrophic Cyanobacteria
- Cyanobacteria are a type of autotroph that uses light energy to produce their own food through photosynthesis.
Role of Chemosynthetic Autotrophic Bacteria
- Chemosynthetic autotrophic bacteria play a crucial role in the environment by converting inorganic compounds into organic compounds, supporting life in ecosystems.
Nitrogen Fixation in Cyanobacteria
- Some cyanobacteria use specialized cells called heterocysts to fix atmospheric nitrogen, making it available for other organisms.
Abundance of Bacteria
- Eubacteria are the most abundant type of bacteria found in nature.
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