NEET2020BotanyCell Cycle and Cell DivisionActual
Match the following events that occur in their respective phases of the cell cycle and select the correct option: Column-I Column-II (a) G 1 phase (i) Cell grows and organelle duplication (b) S phase (ii) DNA replication and chromosome duplication (c) G 2 phase (iii) Cytoplasmic growth (d) Metaphase in M - phase (iv) Alignment of chromosomes
Options
- A( a ) - ( ii ) ,   ( b ) - ( iii ) ,   ( c ) - ( iv ) ,   ( d ) - ( i )
- B( a ) - ( iii ) ,   ( b ) - ( iv ) ,   ( c ) - ( i ) ,   ( d ) - ( ii )
- C( a ) - ( iv ) ,   ( b ) - ( i ) ,   ( c ) - ( ii ) ,   ( d ) - ( iii )
- D( a ) - ( i ) ,   ( b ) - ( ii ) ,   ( c ) - ( iii ) ,   ( d ) - ( iv )
Correct answer
D. ( a ) - ( i ) ,   ( b ) - ( ii ) ,   ( c ) - ( iii ) ,   ( d ) - ( iv )
Step-by-step solution
Phase Characteristics G 1 phase The cell is metabolically most active, cell size increases and organelle duplication takes place in this phase. S phase In this phase, DNA replication, i.e. doubling of DNA content, histone and centriole duplication takes place. G 2 phase In this phase, cytoplasmic growth takes place. Metaphase in M - phase In this stage, chromosomes are highly condensed and the alignment of chromosomes takes place at the metaphasic plate.