If rDNA is introduced in a gene coding for ampicillin , then

Options

A. The host will become resistant for ampicillin .
B. The host will loose resistant for ampicillin.
C. The host will start producing ampicillin
D. The host will start producing tetracycline.

Answer

To solve the question about the introduction of recombinant DNA (rDNA) into a gene coding for ampicillin, we can follow these steps:

### Step 1: Understand the Concept of rDNA
Recombinant DNA (rDNA) is a form of artificial DNA that is created by combining DNA from different organisms. It is often used in genetic engineering to introduce new traits or characteristics into an organism.

**Hint:** Think about how rDNA is created and its purpose in genetic engineering.

### Step 2: Analyze the Function of the Gene Coding for Ampicillin
The gene coding for ampicillin is responsible for the production of ampicillin, which is an antibiotic. In bacteria, this gene can provide resistance to the antibiotic, allowing the bacteria to survive in environments where ampicillin is present.

**Hint:** Consider what happens when a gene that provides resistance to an antibiotic is altered.

### Step 3: Determine the Effect of Introducing rDNA
When rDNA is introduced into the gene coding for ampicillin, it can disrupt the normal function of that gene. This disruption can lead to the loss of the ability to produce ampicillin or to resist its effects.

**Hint:** Focus on the implications of altering a gene that is responsible for antibiotic resistance.

### Step 4: Evaluate the Possible Outcomes
1. The host cell will become resistant to ampicillin.
2. The host will lose resistance to ampicillin.
3. The host will start producing ampicillin.
4. The host will start producing tetracycline.

From the analysis, we can conclude that the introduction of rDNA will likely lead to the host losing its resistance to ampicillin.

**Hint:** Think critically about the relationship between the introduction of rDNA and the resistance mechanisms in the host.

### Step 5: Select the Correct Option
Based on the understanding that the introduction of rDNA disrupts the gene coding for ampicillin, the correct conclusion is that the host will lose resistance to ampicillin.

**Final Answer:** The host will lose resistance to ampicillin.