Question

Which of the following is a correct statement?

• A. Cyanobacteria are a group of autotrophic organisms classified under Kingdom Monera.
• B. Bacteria are exclusively heterotrophic organisms
• C. Slime moulds are saprophytic organisms classified under Kingdom Monera.
• D. Mycoplasma have DNA, Ribosome and cell wall

Answer 1

The Correct Option is A

To determine the correct statement, we need to evaluate each option based on biological knowledge:

1. Cyanobacteria are a group of autotrophic organisms classified under Kingdom Monera.

   Cyanobacteria, also known as blue-green algae, are indeed a group of photosynthetic bacteria. They possess chlorophyll and can perform photosynthesis, making them autotrophic. Moreover, they are classified under the Kingdom Monera, which includes all prokaryotic organisms. This statement is correct.

2. Bacteria are exclusively heterotrophic organisms.

   This statement is incorrect. While many bacteria are heterotrophic and obtain their food from organic sources, others are autotrophic, such as the cyanobacteria mentioned above, which can produce their own food through photosynthesis or chemosynthesis.

3. Slime moulds are saprophytic organisms classified under Kingdom Monera.

   Slime moulds are indeed saprophytic, meaning they feed on decaying organic matter. However, they are not classified under the Kingdom Monera. Slime moulds belong to the Kingdom Protista, not Monera. Hence, this statement is incorrect.

4. Mycoplasma have DNA, Ribosome and cell wall.

   Mycoplasma is a genus of bacteria lacking a cell wall around their cell membrane, which makes them unique among bacterial species. They do have DNA and ribosomes, but the absence of a cell wall means this statement is incorrect.

Therefore, the correct statement is: Cyanobacteria are a group of autotrophic organisms classified under Kingdom Monera.