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Read the following four statements (A-D)...

Read the following four statements (A-D) carefully
(A ) Mycoplasma can not survive without oxygen
(B) Mycoplasma are the smallest living cells known
(C ) Bacteria completely lack a cell wall
(D)Bacteria reproduce mainly by fission
How many of the above statements are correct?

A

one

B

two

C

three

D

four

Text Solution

AI Generated Solution

The correct Answer is:
To determine how many of the statements (A-D) are correct regarding Mycoplasma and bacteria, we will evaluate each statement one by one. ### Step-by-Step Solution: 1. **Evaluate Statement A**: "Mycoplasma cannot survive without oxygen." - **Analysis**: This statement is incorrect. Mycoplasma are known to be facultative anaerobes, meaning they can survive in both the presence and absence of oxygen. Therefore, they do not require oxygen to survive. - **Conclusion**: Statement A is **incorrect**. 2. **Evaluate Statement B**: "Mycoplasma are the smallest living cells known." - **Analysis**: This statement is correct. Mycoplasma are indeed recognized as the smallest known living cells, as they lack a cell wall and have a very small size. - **Conclusion**: Statement B is **correct**. 3. **Evaluate Statement C**: "Bacteria completely lack a cell wall." - **Analysis**: This statement is incorrect. Most bacteria have a cell wall, which is a defining characteristic of prokaryotic cells. While some bacteria, like Mycoplasma, do not have a cell wall, it is not accurate to say that all bacteria lack a cell wall. - **Conclusion**: Statement C is **incorrect**. 4. **Evaluate Statement D**: "Bacteria reproduce mainly by fission." - **Analysis**: This statement is correct. Bacteria primarily reproduce asexually through a process called binary fission, where a single cell divides into two identical daughter cells. - **Conclusion**: Statement D is **correct**. ### Summary of Findings: - Statement A: Incorrect - Statement B: Correct - Statement C: Incorrect - Statement D: Correct ### Final Count of Correct Statements: Out of the four statements, **two statements (B and D) are correct**. ### Answer: **2 statements are correct.** ---
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