Flashcards- Ch 12 Notes Part 1 Cell Cycle

Front

Meaning of growth of a multicellular organism in terms of the cells

Back

Made up of more cells due to cell division (not larger cells)

Front

Why do multicellular organisms make more cells?

Back

Cell size is limited by its surface area to volume ratio (SA:V). If a cell gets too large, it isn’t possible for it to get oxygen/nutrients in and wastes out by diffusion.

Front

Relationship between surface area and volume as a cell increases in size.

Back

As a cell increases in size, its surface area increases by the square of the size (X^2), while its volume increases by the cube of the size (X^3).

Front

Importance of volume vs surface area of a cell

Back

Volume: Enzyme/chemical reactions occur here (supplies used).

Surface Area: How materials get into/out of cells.

Front

simple definition of mitosis

Back

In simple terms: 1 cell divides into 2 new identical cells.

Front

Explain the Cell Division Diagram

Back

parent cell (or "Mother" cell) grows, undergoes replication/division, resulting in 2 identical daughter cells.

Front

3 main stages of the Cell Cycle

Back

1. Interphase
2. Mitosis
3. Cytokinesis

Front

Describe Interphase

Back

Longest stage (90%) of cell cycle; preparation for cell division; cell is doing its normal function/job (e.g., making proteins), also copying its DNA.

Front

Describe Mitosis

Back

~10% of cell cycle, Nucleus divides into 2 nuclei, each with the same number and kind of chromosomes (DNA) as the parent cell.

Front

Describe Cytokinesis

Back

Cytoplasm divides forming 2 distinct cells.