Respuesta :
When the cell has reached an appropriate size and is in a supportive environment for DNA replication, it will exit either G1 or G0 and enter the next phase of interphase called S phase. S phase, or synthesis, is the phase of the cell cycle when DNA packaged into chromosomes is replicated.
During G1, the DNA molecule is called CHROMATIN. This molecule (DNA) looks like tangled strands of spaghetti.
- The cell cycle has two main phases: interphase and M (mitosis) phase.
- The interphase can in turn be divided into three phases: Growth 1 (G1) phase, Synthesis (S) phase and Growth 2 (G2) phase.
- During interphase, DNA is wrapped as chromatin fibers, which are composed of both DNA and associated proteins called histones.
- During this phase (interphase), chromatin looks like spaghetti because there is no obvious pattern of organization.
- The nucleosome is the functional unit of chromatin. A nucleosome consists of 147 base pairs of DNA wrapped around an octamer of histones.
- During the M phase, chromatin condenses to form chromosomes.
In conclusion, during G1, the DNA molecule is called CHROMATIN. This molecule (DNA) looks like tangled strands of spaghetti.
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