Question

Match the options in column I with those in column II.

• A. a $\to$ iii, b $\to$ iv, c $\to$ v, d $\to$ i, e $\to$ii
• B. a $\to$ iv, b iii, c $\to$ ii, d $\to$ v, e $\to$ i
• C. a $\to$ iv, b $\to$ iii, c $\to$ v, d $\to$ ii, e $\to$ i
• D. a $\to$ iii, b $\to$ iv, c $\to$ v, d $\to$ ii, e $\to$ i

Answer 1

The correct option is C a $\to$ iv, b $\to$ iii, c $\to$ v, d $\to$ ii, e $\to$ i

a) Cells that do not divide further exit G${}_1$ phase to enter an inactive stage called quiescent stage (G${}_0$) of the cell cycle. Cells in this stage remain metabolically active but no longer proliferate unless called on to do so.

b) Small disc-shaped structures at the surface of the centromeres are called kinetochores.

c) The metaphase is characterized by the congression of spindle fibres bringing all the chromosomes to lie at the equator.

d) Diplotene is characterized by the formation of chiasmata. The recombined homologous chromosomes of the bivalents separate from each other except at the sites of crossovers. These X-shaped structures, are called chiasmata.

e) During zygotene stage, chromosomes start pairing together and this process of association is called synapsis. The complex formed is called synaptonemal complex.