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Which of. These statements about Mycopla...

Which of. These statements about Mycoplasma is / are true ?
I. Mycoplasma is the smallest cell known.
II . They are not prokaryotic in nature .
III. They can respire only in the presence of oxygen .
IV. They lack cell walls.

A

I and II

B

I and IV

C

I , II and III

D

II and IV

Text Solution

AI Generated Solution

The correct Answer is:
To determine which statements about Mycoplasma are true, let's analyze each statement one by one. ### Step 1: Analyze Statement I **Statement I: Mycoplasma is the smallest cell known.** - Mycoplasma is indeed recognized as one of the smallest known cellular organisms. They are single-celled and lack many of the structures found in larger cells. Therefore, this statement is **true**. ### Step 2: Analyze Statement II **Statement II: They are not prokaryotic in nature.** - Mycoplasma are classified as prokaryotes. They lack a defined nucleus and other membrane-bound organelles, which are characteristic of prokaryotic cells. Therefore, this statement is **false**. ### Step 3: Analyze Statement III **Statement III: They can respire only in the presence of oxygen.** - Mycoplasma are versatile in their metabolic processes. They can survive in both aerobic (with oxygen) and anaerobic (without oxygen) conditions. The use of the word "only" makes this statement misleading. Therefore, this statement is **false**. ### Step 4: Analyze Statement IV **Statement IV: They lack cell walls.** - One of the defining features of Mycoplasma is that they do not have a cell wall. This characteristic distinguishes them from most other prokaryotes, which typically have cell walls. Therefore, this statement is **true**. ### Conclusion Based on the analysis: - Statement I is true. - Statement II is false. - Statement III is false. - Statement IV is true. Thus, the true statements about Mycoplasma are **I and IV**. ### Final Answer The correct option is that statements I and IV are true. ---
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