CELL STRUCTURES AND FUNCTION
CELL DIVISION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
a lower surface area/volume ratio than the parent cell
|
|
|
a higher surface area/volume ratio than the parent cell
|
|
|
more DNA in its nucleus than the parent cell
|
|
|
less DNA in its nucleus than the parent cel
|
Detailed explanation-1: -In that case, the correct answer will be (b): “each daughter cell has a higher surface area to volume ratio than the parent cell.” This change in ratio is because the reduction in cell surface area is less than the reduction in volume.
Detailed explanation-2: -Cell division requires an increase in surface area to volume ratio. During early development, surface area can increase, volume can decrease, or surface topography can be optimized to allow for division. While exocytosis is thought to be essential for division [Mol.
Detailed explanation-3: - When the cell divides to form two smaller cells, each cell has a larger surface area (SA) to volume (Vol) ratio.
Detailed explanation-4: -Smaller single-celled organisms have a high surface area to volume ratio, which allows them to rely on oxygen and material diffusing into the cell (and wastes diffusing out) in order to survive.
Detailed explanation-5: -At the end of mitosis, the two daughter cells will be exact copies of the original cell. Each daughter cell will have 30 chromosomes. At the end of meiosis II, each cell (i.e., gamete) would have half the original number of chromosomes, that is, 15 chromosomes.