Which of the following is common in sticky ends and molecular probes?

Options

A. They both are parts of RNA molecules
B. They both involve in complementary pairing
C. They, both are important aspects of bacterial conjugation
D. They both are used as gene vectors in genetic engineering

Answer

To solve the question "Which of the following is common in sticky ends and molecular probes?", we can follow these steps:

### Step 1: Understand the Terms
- **Sticky Ends**: These are short, single-stranded overhangs at the ends of DNA molecules that result from certain types of restriction enzyme cuts. They can easily pair with complementary DNA sequences.
- **Molecular Probes**: These are fragments of DNA or RNA that are labeled and used to detect the presence of complementary sequences in a sample through hybridization.

### Step 2: Analyze the Options
The options given are:
- A) They both are parts of RNA molecules.
- B) They both involve complementary pairing.
- C) They both are important aspects of bacterial conjugation.
- D) They both are used as gene vectors in genetic engineering.

### Step 3: Evaluate Each Option
- **Option A**: Incorrect. Sticky ends are part of DNA, not RNA.
- **Option B**: Correct. Both sticky ends and molecular probes rely on complementary base pairing to bind to their respective targets.
- **Option C**: Incorrect. While bacterial conjugation involves DNA transfer, it does not specifically relate to sticky ends or molecular probes.
- **Option D**: Incorrect. Gene vectors are typically plasmids or viruses, not sticky ends or molecular probes themselves.

### Step 4: Conclusion
The correct answer is **Option B: They both involve complementary pairing**. This is because both sticky ends and molecular probes utilize the principle of complementary base pairing to bind with their targets.