Bacteria plasmid contains
(a) RNA
(b) RNA +Protein
(c) DNA
(d) Photosynthetic structures

Options

A. RNA
B. RNA +Protein
C. DNA
D. Photosynthetic structures .

Answer

To solve the question regarding what bacteria plasmids contain, let's break it down step by step:

### Step 1: Understand what a plasmid is
A plasmid is a small, circular piece of DNA that is separate from the chromosomal DNA found in bacteria. It is considered extra-chromosomal, meaning it exists independently of the main bacterial chromosome.

**Hint:** Remember that plasmids are distinct from the main genetic material of the bacteria.

### Step 2: Identify the composition of plasmids
Plasmids are composed solely of DNA. They do not contain RNA or proteins as part of their structure. This DNA can replicate independently of the bacterial chromosome.

**Hint:** Focus on the fact that plasmids are made of DNA and not other biomolecules.

### Step 3: Evaluate the options
Now, let's look at the options provided in the question:
- (a) RNA: Incorrect, as plasmids do not contain RNA.
- (b) RNA + Protein: Incorrect, as plasmids do not contain either RNA or proteins.
- (c) DNA: Correct, as plasmids are made up of DNA.
- (d) Photosynthetic structures: Incorrect, as plasmids do not contain structures related to photosynthesis.

**Hint:** Compare each option to the definition and composition of plasmids.

### Step 4: Conclusion
Based on the understanding that plasmids are extra-chromosomal circular DNA, the correct answer is (c) DNA.

**Final Answer:** (c) DNA