Q. Which of the following statements regarding the nucleus are correct:

1. The nucleus has a double layered covering called nuclear membrane.
2. The nucleus contains chromosomes, which are visible as rod-shaped structures.

Select the correct answer using the codes given below:
Answer: Only 1
Notes: The nucleus is surrounded by a double-layered nuclear membrane with pores for material exchange. It contains chromosomes, but these become visible as distinct rod-shaped structures only during cell division. Thus, statement 1 is correct, while statement 2 is only partly correct as visibility occurs only during cell division.