Unit 1: Cell & Mitosis

Introduction

The Cell is the basic unit of life containing many different organelles that fulfill the various purposes of the cell

Nucleus: Store DNA; Site of DNA Transcription

Endoplasmic Reticulum:

Rough: Protein Synthesis

Smooth: Lipid Synthesis; Calcium Storage

Ribosomes: Protein Synthesis

Golgi Apparatus: Package & Modify Proteins

Mitochondria: Site of ATP synthesis

Lysosome: Breakdown cell debris & foreign pathogens

Peroxisome: Breakdown fat, alcohol, hydrogen peroxide

Centrioles: Assist in mitotic spindle formation

Mitosis is the division of a cell which results in genetically identical daughter cells

The chromosome count stays the same (2 copies of 23 chromosomes)

DNA condenses into chromosome form & mitotic spindle forms

Chromosomes line up on the equator of the cell

The duplicated chromosomes begin to be pulled apart by the mitotic spindle

The now-separated chromosomes uncondensed into DNA form and the mitotic spindle disappears

Cytokinesis begins with the formation of the cleavage furrow

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