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Which of the following is NOT a characteristic of eubacteria or 'true bacteria'?
- a)Presence of a rigid cell wall
- b)Motility through flagella
- c)Ability to fix atmospheric nitrogen
- d)Lack of chlorophyll
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Which of the following is NOT a characteristic of eubacteria or 'true ...
Eubacteria, also called true bacteria, often have a rigid cell wall and flagella for motility. Some eubacteria, such as cyanobacteria, possess chlorophyll (specifically chlorophyll a) and are capable of photosynthesis. Hence, they can fix atmospheric nitrogen, unlike other eubacteria.
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Which of the following is NOT a characteristic of eubacteria or 'true ...
Understanding Eubacteria Characteristics
Eubacteria, commonly referred to as 'true bacteria', exhibit several defining features. Among the options provided, the lack of chlorophyll is the characteristic that does not apply universally to all eubacteria.
Key Characteristics of Eubacteria:
- Presence of a Rigid Cell Wall:
Most eubacteria possess a rigid cell wall composed primarily of peptidoglycan, which provides structural support and protection.
- Motility through Flagella:
Many eubacteria are motile and can move using flagella, which are long, whip-like structures that enable movement in liquid environments.
- Ability to Fix Atmospheric Nitrogen:
Certain eubacteria, particularly those in the genus Rhizobium and some cyanobacteria, have the capability to fix atmospheric nitrogen into a form usable by plants, thus playing a crucial role in the nitrogen cycle.
- Lack of Chlorophyll:
This characteristic does not apply to all eubacteria. While many eubacteria do not contain chlorophyll and are heterotrophic (relying on organic compounds for nutrition), others, like cyanobacteria, possess chlorophyll and can perform photosynthesis. This ability to utilize sunlight for energy distinguishes them from many other bacteria.
Conclusion:
Therefore, the correct answer is option 'D' because the presence of chlorophyll is a feature that some eubacteria possess, contradicting the statement that they universally lack it. Understanding this distinction is crucial for studying bacterial diversity and their ecological roles.
Eubacteria, commonly referred to as 'true bacteria', exhibit several defining features. Among the options provided, the lack of chlorophyll is the characteristic that does not apply universally to all eubacteria.
Key Characteristics of Eubacteria:
- Presence of a Rigid Cell Wall:
Most eubacteria possess a rigid cell wall composed primarily of peptidoglycan, which provides structural support and protection.
- Motility through Flagella:
Many eubacteria are motile and can move using flagella, which are long, whip-like structures that enable movement in liquid environments.
- Ability to Fix Atmospheric Nitrogen:
Certain eubacteria, particularly those in the genus Rhizobium and some cyanobacteria, have the capability to fix atmospheric nitrogen into a form usable by plants, thus playing a crucial role in the nitrogen cycle.
- Lack of Chlorophyll:
This characteristic does not apply to all eubacteria. While many eubacteria do not contain chlorophyll and are heterotrophic (relying on organic compounds for nutrition), others, like cyanobacteria, possess chlorophyll and can perform photosynthesis. This ability to utilize sunlight for energy distinguishes them from many other bacteria.
Conclusion:
Therefore, the correct answer is option 'D' because the presence of chlorophyll is a feature that some eubacteria possess, contradicting the statement that they universally lack it. Understanding this distinction is crucial for studying bacterial diversity and their ecological roles.
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