read the following characteristics and select the correct statement w.r.t bacteriophage. (a) usually have ds DNA as genetic material. (b) Tail is proteinaceous and contains genetic material. (c) show binal symmetry. (d) it has 6 tail 3 and 6 tail fibres which aids its attachment to host cell

Options

A. (a), (b) &(c)
B. (a), (c) &(d)
C. (b), (c) &(d)
D. (a) & (d) only

Answer

To solve the question regarding the characteristics of bacteriophages, we will analyze each statement one by one:

### Step-by-Step Solution:

1. **Statement A: Usually have ds DNA as genetic material.**
- Bacteriophages are indeed viruses that primarily infect bacteria, and most of them possess double-stranded DNA (ds DNA) as their genetic material.
- **Conclusion:** This statement is **correct**.

2. **Statement B: Tail is proteinaceous and contains genetic material.**
- The tail of a bacteriophage is indeed made of protein, but it does not contain genetic material. The genetic material is located in the head of the bacteriophage, not in the tail.
- **Conclusion:** This statement is **incorrect**.

3. **Statement C: Show binal symmetry.**
- Bacteriophages exhibit binal symmetry, which means they have a combination of two different shapes: a helical tail and an icosahedral head. This characteristic is typical of many bacteriophages.
- **Conclusion:** This statement is **correct**.

4. **Statement D: It has 6 tail fibers which aids its attachment to host cell.**
- Bacteriophages typically have six tail fibers that help them attach to the bacterial host cell. This is an important feature for the infection process.
- **Conclusion:** This statement is **correct**.

### Final Evaluation:
- Statements A, C, and D are correct, while statement B is incorrect. Therefore, the correct statements regarding bacteriophages are A, C, and D.