CELL STRUCTURES AND FUNCTION
CELL DIVISION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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protein synthesis, organelle number increase, cell size increases, Cyclin D is expressed
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DNA is replicated, triggered by Cyclin A
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protein synthesis, organelle number increase, cell size increases, Cyclin B is expressed to promote spindle formation
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Separation of sister chromatids into genetically identical nuclei
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Detailed explanation-1: -During G1 phase, the cell grows in size and synthesizes mRNA and protein that are required for DNA synthesis. Once the required proteins and growth are complete, the cell enters the next phase of the cell cycle, S phase.
Detailed explanation-2: -During the cell cycle, RNA and protein synthesis takes place during the G1 and G2 phases. The cell cycle is an ordered set of events, culminating in cell growth and division into two daughter cells.
Detailed explanation-3: -Understanding Stages Of The Cell Cycle : Example Question #1 G1 and G2 are both growth phases, during which cellular organelles are replicated and the cell grows in size. The M phase refers to mitosis, or cell division.
Detailed explanation-4: -Cyclin D1 plays a central role in the regulation of proliferation, linking the extracellular signaling environment to cell cycle progression [1]. The expression level of cyclin D1 is highly responsive to the action of proliferative signals including growth factor receptors, Ras, and their downstream effectors.