Chapter 4 part 1 (4.1-4.4)

Cell

Smalles functioning unit

Cytoplasm function

Catalyzes chemical reactions of metabolism

Cell wall function

Maintains the shape of the cell

Two basic principles of cell theory

1. All organisms are composed of cells

2. Cells are the basic structure & function in organisms

Bacteria (Prokaryotes) do not have what

Membrane bound nucleus

Identify the 4 characteristic common to all cells

1. DNA

2. Ribosomes

3. Cytoplasm

4. Cell Membrane

Ribosomes structure

Small and large subunit sandwiched together

Locations of ribosomes

• Some free in cytoplasm

• Some attached to endoplasmic reticulum

Capsule function

Gel-like coat outside the cell wall

Plasma membrane function

Regulates molecules entering and exiting the cell

Enzymes

Speed up chemical reaction

Nucleoid function

Where DNA is located

Ribosomes function

Site of protein synthesis

Flagellum function

Provides mobility

Nuclear Pore

Allows things to flow out of nucleus

Nuclear envelope

Double membrane surrounding the nucleus

Nucleolus

Produces subunits of ribosomes

Chromatin

Genetic info condensed into chromosomes

Genes

Basic units of heredity

Nucleus

Essential to the like and function of eukaryotic cell

Chromosomes

Carries genetic information

Endosymbiotic theory

Explanation of eukaryotic organelles evolution

Vesicle

Transports things around the cell

Organelle

• Performs specific function

• Isolates reaction