Chromatin contains:

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

Select the correct option for the following matches:

Column-$I$	Column-$II$
$(1)$ Chromosome arms are of equal length	$(a)$ Submetacentric
$(2)$ One arm of the chromosome is shorter	$(b)$ Acrocentric
$(3)$ One arm is extremely long and the other is very short	$(c)$ Telocentric
$(4)$ Terminal centromere	$(d)$ Metacentric

Match the parts of the chromosome given in Column $I$ with their explanation in Column $II$:

Column $I$ (Chromosome)	Column $II$ (Explanation)
$1$. Centromere	$a$. Disc-shaped plate where spindle fibres get attached during cell division.
$2$. Secondary constriction	$b$. Long unbranched slender highly coiled $DNA$.
$3$. Kinetochore	$c$. Place where $2$ chromatids are joined together.
$4$. Chromatonema	$d$. Nucleolus gets organised at this place.

Choose the correct answer from the following options.

Chromosomes are composed of .......

Amoeba is eukaryotic because it possesses