CELL DIVISION
THE CELL CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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places more demands on its DNA
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uses up food and oxygen more quickly
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has more trouble moving enough materials across its cell membrane
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all are true
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Detailed explanation-1: -As a cell expands in volume, its surface area/volume ratio diminishes, resulting in slowed transfer of gases and nutrients. In order to avoid these issues with size, a cell grows and eventually divides to form two “daughter” cells, each with its own complete copy of DNA.
Detailed explanation-2: -Body tissues grow by increasing the number of cells that make them up. Cells in many tissues in the body divide and grow very quickly until we become adults. When we are adults many cells mature and become specialised for their particular job in the body. So they don’t make copies of themselves (reproduce) so often.
Detailed explanation-3: -In general, we grow to our full adult size via an increase in the number-not the size-of our cells. But some of our cells can change size-and this can be for healthy or not-so-healthy reasons.
Detailed explanation-4: -Cells can grow by increasing the overall rate of cellular biosynthesis such that production of biomolecules exceeds the overall rate of cellular degradation of biomolecules via the proteasome, lysosome or autophagy.