if a bacteriophage having `S^(35)` infects a bacterium growing on normal medium, the bacteriophages produced after the death of bacterium will

Options

A. incorporate `S^(35)` into their nucleic acid
B. incorporate `S^(35)` into their particles
C. not incorporate `S^(35)` into their particles
D. incorporate `S^(35)` into their protein coat as protein is genetic

Answer

**Step-by-Step Solution:**

1. **Understanding Bacteriophage and Sulfur-35**:
- A bacteriophage is a type of virus that specifically infects bacteria.
- Sulfur-35 (S-35) is a radioactive isotope of sulfur, which is often used in experiments to trace the presence of sulfur in biological molecules.

2. **Composition of Bacteriophage**:
- Bacteriophages consist of a protein coat (capsid) and nucleic acid (DNA or RNA).
- Notably, nucleic acids do not contain sulfur, while proteins can contain sulfur due to the presence of amino acids such as cysteine and methionine.

3. **Infection Process**:
- When a bacteriophage with S-35 infects a bacterium, the bacteriophage injects its genetic material into the bacterial cell.
- The bacterial cell then uses this genetic material to produce new bacteriophages.

4. **Production of New Bacteriophages**:
- The new bacteriophages produced inside the bacterium will have the same protein coat as the original bacteriophage, which contains the S-35.
- However, the nucleic acid of the new bacteriophages will not contain sulfur, as nucleic acids do not incorporate sulfur.

5. **Conclusion**:
- After the bacterium dies and releases the new bacteriophages, these new phages will contain radioactive sulfur in their protein coat, but not in their nucleic acid.
- Therefore, the correct conclusion is that the new bacteriophages will incorporate S-35 into their protein coat, but not into their nucleic acid.

**Final Answer**: The bacteriophages produced after the death of the bacterium will incorporate Sulfur-35 into their protein coat, but not into their nucleic acid.

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