Beads on string like structures of A are seen in B, which further condense to form chromosomes in C stage of cell division.

	A	B	C
1.	Chromonema	Chromatin	Metaphase
2.	Chromatin	Chromatid	Metaphase
3.	Chromonema	Chromosome	Anaphase
4.	Chromonema	Chromatid	Anaphase

Which is the longest phase of the cell cycle?

The checkpoint in cell cycle plays important role in 
(1) repair DNA damage
(2) apoptosis initiation 
(3) assess DNA damage
(4) inhibit cell damage.

The checkpoint in cell cycle plays important role in 

Identify the correct matched pair.

The mandatory combination responsible for assembly of microtubules are

1. $N{a}^{+}$ and $C{a}^{2+}$

2. $M{g}^{2+}$ and $C{a}^{2+}$

3. $C{l}^{-}$ and $C{a}^{2+}$

4. $N{a}^{+}$ and $K^{+}$

The exchange of segments of non-sister chromatids between chromosomes of a homologous pair termed as

(1) transformation 

(2) translocation

(3) crossing over

(4) chromosomal aberration

Which of the following ions are necessary for assembly of microtubules?

(1) $N{a}^{+}$ and ${\mathrm{K}}^{+}$

(2) ${\mathrm{Ca}}^{2+}$ and ${\mathrm{Cl}}^{-}$

(3) ${\mathrm{Ca}}^{2+}$ and ${\mathrm{Mg}}^{2+}$

(4) ${\mathrm{Na}}^{+}$ and ${\mathrm{Ca}}^{2+}$

Which one of the following is the best stage to observe the shape, size and number of chromosomes in a cell?

(1) Interphase
(2) Prophase
(3) Metaphase
(4) Telophase

Calcium dependent Kinases can control