a.The passage through which movement of RAN and protein molecules takes place in both directions in a nuclear pore.
b. A disc - shaped structures is kinetochore is present as a lateral side of centromere
c. DNA moves easily in both directions through the nuclear pore
Read the following and select the correct option

Options

A. a and b are true .
B. b and c are true.
C. c and a are true .
D. a , b and c are true.

Answer

To solve the question, we need to analyze each statement provided and determine whether they are true or false:

### Step 1: Analyze Statement A
- **Statement A**: "The passage through which the movement of RNA and protein molecules takes place in both directions is a nuclear pore."
- **Analysis**: This statement is true. Nuclear pores are large protein complexes that allow the transport of RNA and proteins between the nucleus and the cytoplasm in both directions.

### Step 2: Analyze Statement B
- **Statement B**: "A disc-shaped structure is kinetochore is present as a lateral side of centromere."
- **Analysis**: This statement is also true. The kinetochore is a protein structure that forms on the centromere of a chromosome during cell division and is involved in the movement of chromosomes. It is indeed disc-shaped and located at the lateral side of the centromere.

### Step 3: Analyze Statement C
- **Statement C**: "DNA moves easily in both directions through the nuclear pore."
- **Analysis**: This statement is false. DNA does not move through nuclear pores; it remains in the nucleus. Only RNA (which is transcribed from DNA) and proteins can move through the nuclear pore.

### Step 4: Conclusion
- Based on the analysis, we find that:
- Statement A is correct.
- Statement B is correct.
- Statement C is incorrect.

Thus, the correct option is that both Statement A and Statement B are true.

### Final Answer
The correct option is **A and B are true; C is false**.

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