Cell Growth Limits Flashcards
These are the limits that restrict cell growth and division.
Why do cells divide?
The larger a cell becomes, the more pressure the cell’s DNA feels. Also, if the cell grows to large it will have trouble moving enough nutrients and waste across the cell.
All of the _____ that a cell needs to function is stored in the DNA of the cell.
info
DNA is packaged into _____. A _____ consists of one very long linear DNA molecule made of 1000 genes.
chromosome
Each gene is the instructions for making a particular _____ that the cell needs.
protein
The cell is constantly _____ _____ of these genes and sending the copies (in the form of RNA) out to the _____.
making copies; ribosomes
As the cell grows too large, there is an “information crisis”. The DNA cannot keep up with:
demands of running a large cell
A cell must take in a constant inflow of _____ & _____ across the membrane.
food; water
______ must constantly be crossing the membrane in order to leave the cell.
Waste
A larger cell will require much more _____ & _____ & _____, and will generate much more _____.
food; oxygen; water; waste
As the cell grows, the _____ of the cell increases much more rapidly than the _____ _____ of the cell membrane.
volume; surface area
When the cell gets too large, the membrane surface area is not adequate enough to:
transport the large quantities of food and water in and waste products out
