In which type of chromosome is the centromere situated in the middle?

Transfer of protein and $RNA$ between nucleus and cytoplasm occurs through

The nucleus of a eukaryotic cell can be stained by $..........$.

The nuclear envelope consists of two parallel membranes with a space between them called the perinuclear space,which is about:

Which of the following is not a membrane-bound organelle?

Which of the following statements is/are correct?
$(a)$ The nuclear matrix or nucleoplasm contains the nucleolus and chromatin.
$(b)$ The outer nuclear membrane $(Ectokaryotheca)$ is usually continuous with the endoplasmic reticulum and also bears ribosomes on it.
$(c)$ Cells that are actively synthesizing protein have small and fewer nucleoli.