BIOLOGY PACKET

1.Information Overload: The larger a cell gets, the more demands it places on its DNA. Eventually, the cell's DNA cannot meet the cell's needs.

2. Exchange of materials: Cell takes in nutrients and eliminate wastes through the cell membrane. The larger a cell's volume, the more materials it needs to function and the more waste. If a cell gets larger, the harder it is for enough materials to move across its cell membrane.

What is Cell division? It solves the information overload and materials exchange problems.

Interphase

1.G1 (1st Gap Phase)- the cell grows and organelles duplicates. Also called preparatory phase

2.S (Synthesis phase) - the cell replicates its DNA. It is also called DNA Replication

G2 (2nd Gap Phase) - the cell produces organelles and materials for division.

1.G1 (1st Gap Phase) - the cell grows and organelles duplicates. Also called preparatory phase

2. S Phase (Synthesis Phase) - the cell duplicates the DNA. From long uncoiled 1 Chromatin or chromosome to coiled 2 sister chromatids or chromosome. This process is called REPLICATION.

3. G2 (2nd Gap Phase) - cell grows more - more proteins and organelles.

M phase - the cell divides through mitosis (division of the nucleus) and cytokinesis (division of cytoplasm