Prokaryotic transcription mechanism requires involvement of only one polymerase type and.
(a) It occurs in cytoplasm only .
(b) It is often coupled with translation
(c) It does not require splicing but capping is essential

Options

A. All are correct
B. Both (b) & (c) are correct
C. Both (a) & (c) are correct
D. Only (c) is incorrect

Answer

To solve the question regarding the prokaryotic transcription mechanism, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding Prokaryotic Transcription**:
- Prokaryotic transcription is the process by which messenger RNA (mRNA) is synthesized from a DNA template. This process involves only one type of RNA polymerase.

2. **Analyzing Option (a)**: "It occurs in cytoplasm only."
- In prokaryotes, transcription occurs in the cytoplasm because they lack a defined nucleus. This statement is **correct**.

3. **Analyzing Option (b)**: "It is often coupled with translation."
- In prokaryotes, transcription and translation can occur simultaneously. As soon as mRNA is synthesized, ribosomes can attach to it and begin translating it into protein. This statement is **correct**.

4. **Analyzing Option (c)**: "It does not require splicing but capping is essential."
- In prokaryotes, mRNA does not undergo splicing (removal of introns) or capping (addition of a modified guanine nucleotide at the 5' end). These processes are characteristic of eukaryotic mRNA processing. Therefore, this statement is **incorrect**.

5. **Conclusion**:
- Based on the analysis:
- Option (a) is correct.
- Option (b) is correct.
- Option (c) is incorrect.
- Therefore, the correct answer is that only option (c) is incorrect.

### Final Answer:
The correct answer is: **Only (c) is incorrect.**