The Cell Nucleus

Agenda

• A brief review of the nucleus
• Work on E. coli paper
• Use microscopes to observe cell parts

Objectives

• Outline the form and function of nucleus
• Structure and function of nuclear envelope
• Explain role of nucleous
• Make progress on E. coli paper
• Apply what you've learned when using microscope

In eukaryotic cells DNA lives in the nucleus, the largest organelle.

Each chromosome contains many genes coded by DNA.

When a call is not dividing, DNA is loosely coiled in long, thin strands of chromatin.

The nucleus has a double membrane called the nuclear envelope. The outer membrane is continuous with the ER.

The nuclear envelop has nuclear pores.

Some nuclei contain a nucleolus to assemble ribosomes.

Microscope Lab

• Observe at least two types of cells.
• Draw the cells.
• Label the nucleus and cell membrane.