Question: 100% NCERT covered from Particular Keyword.Explanations are 100% from NCERT | [Difficult level: Easy] From NCERT NEET Derived Question.
Cell growth , normal metabolism and duplication of organelles occur
in which of the following phase
1. S
2. M
3. G1
4. G2
Answer:(3)
G1 phase is the period when the cell grows and carries out normal metabolism. Most of the organelle duplication also occurs during this phase
👉The cell cycle is divided into two basic
phases:
l- Interphase
2- M Phase (Mitosis phase)
👉In the 24 hour average duration of cell
cycle of a human cell, cell division proper lasts
for only about an hour. The interphase lasts
more than 95% of the duration of cell cycle.
👉The interphase is divided into three further phases:
G1 phase (Gap 1)
S phase (Synthesis)
G2 phase (Gap 2)
👉M phase include:
Karyokinesis
cytokinesis
👉The interphase, though called
the resting phase, is the time during which the cell is preparing for division
by undergoing both cell growth and DNA replication
👉Karyokinesis involves
following four stages:
Prophase
Metaphase
Anaphase
Telophase
👉Prophase I: five phases based on chromosomal
behaviour, i.e.,
Leptotene,
Zygotene,
Pachytene,
Diplotene and
Diakinesis.
