Objectives February 1 Explain why cells are relatively small Summarize the primary stages of the cell cycle. Describe the stages of interphase.

Size Matters Size Matters!

What limits cell size Ratio of surface area to volume. The bigger the ratio the better as a cell gets bigger the ratio shrinks. Think Stadium gates!

Start with $1.00 Surface Area (squared) $1.00 $2.00 $4.00 $8.00 $16.00 $32.00 $64.00 $ $ Volume (Cubed) $1.00 $3.00 $9.00 $27.00 $81.00 $ $ $2, $6,561.00

$ $1, $2, $4, $8, $16, $32, $65, $131, $262, $524, $19, $59, $177, $531, $1,594, $4,782, $14,348, $43,046, $129,140, $387,420, $1,162,261,467.00

The ability to transport substances limits cell size Diffusion Transport Proteins Cellular Communications: The ability for signaling proteins to move throughout the cell limits cell size

Surface to Volume Ratio limits cell size

The Cell Cycle

Interphase Mitosis Cytokinesis

The Cell Cycle Interphase

The Cell Cycle Interphase Grows and Develops. Prepares to duplicate DNA.

The Cell Cycle Interphase Grows and Develops. Prepares to duplicate DNA. Cell Copies its DNA

The Cell Cycle Interphase Grows and Develops. Prepares to duplicate DNA. Cell Copies its DNA Cell prepares its nuclear material for division.

The Cell Cycle Mitosis

The Cell Cycle Cytokinesis

Warm up List three factors that limit cell size.

Objectives: February 3rd Review 3 factors that limit cell size Summarize the primary stages of the cell cycle. Describe the stages of interphase.

Factors Limiting Cell Size

Surface to volume ratio

Factors Limiting Cell Size Surface to volume ratio The ability to transport substances (diffusion, transport proteins, cytoskeleton railway)

Factors Limiting Cell Size Surface to volume ratio The ability to transport substances (diffusion, transport proteins, cytoskeleton railway) Cellular communications

The Cell Cycle Interphase MitosisCytokinesis

Mitosis

The Cell Cycle Interphase MitosisCytokinesis

Stages of Interphase G1, S, G2

The Cell Cycle Interphase Grows and Develops. Prepares to duplicate DNA. Cell Copies its DNA Cell prepares its nuclear material for division.

Summary 3 factors limit cell size When cells reach these limits the divide The Cell Cycle is the process of cellular reproduction Three primary stages of the cell cycle are Interphase, Mitosis and cytokinesis The cell spends the vast majority of its life in interphase.

Homework Page through 13 inclusive. Write out the questions and the answers. Quiz tomorrow on section 9.1 SQ3R section 9.2 (pgs )

Objectives Section 9.2 Eukaryotic Cells reproduce by mitosis, the process of nuclear division, and cytokinesis, the process of cytoplasm division. Describe the events of each stage of mitosis Explain the process of cytokinesis

1

1 2

1 2 3

Homework Page through 13 inclusive. Write out the questions and the answers. Quiz tomorrow on section 9.1 SQ3R section 9.2 (pgs )

Objectives February 6 Review mitosis is the process by which duplicated DNA is divided The four stages of mitosis are Prophase, Metaphase, Anaphase, Telophase Cytokinesis is the process of cytoplasm division that results in genetically identical daughter cells.

Interphase Duplicates DNA in preparation for Mitosis

Mitosis The key activity of mitosis is the accurate separation of the cells replicated DNA

Cytokinesis The process of cytoplasm division that results in genetically identical daughter cells.

Prophase

Metaphase

Anaphase

Telophase

Interphase Duplicates DNA in preparation for Mitosis

Mitosis The key activity of mitosis is the accurate separation of the cells replicated DNA

Cytokinesis The process of cytoplasm division that results in genetically identical daughter cells.

Objectives February 6 Review mitosis is the process by which duplicated DNA is divided The four stages of mitosis are Prophase, Metaphase, Anaphase, Telophase Cytokinesis is the process of cytoplasm division that results in genetically identical daughter cells.

Homework SQ3R section 9.3 Quiz Monday you will be able to use the SQ3R.