EVERYDAY SCIENCE

SCIENCE

CELL BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
. As a cell grows larger, it has more trouble
A
. replicating its chromosomes.
B
moving enough nutrients across the cell membrane.
C
. moving through the cell cycle.
D
completing cell division.
Explanation: 

Detailed explanation-1: -The larger a cell becomes, the more demands the cell places on its DNA and the more trouble the cell has moving enough nutrients and wastes across the cell membrane.

Detailed explanation-2: -If a cell grows larger, then the volume increases much more rapidly than the surface area, causing the ratio of surface area to volume to decrease. The problem is that the cell would not be able to get enough oxygen and nutrients in and get the waste products out.

Detailed explanation-3: -Answer and Explanation: Compared to small cells, large cells have more trouble moving materials across the cellular membrane. This includes both moving needed materials in and getting rid of waste. The issue is that large cells have a lower ratio of surface area to volume.

Detailed explanation-4: -Cells are limited in size because the outside (the cell membrane) must transport the food and oxygen to the parts inside. As a cell gets bigger, the outside is unable to keep up with the inside, because the inside grows a faster rate than the outside.

Detailed explanation-5: -If a cell became too large, an “information crisis” would occur. The cell has more trouble moving enough nutrients and wastes across the cell membrane. The rate at which food, oxygen, and water enter the cell, as well as wast products leave the cell, depends on the surface area of the cell and the cell’s volume.

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