Cell Parts for Protein Production: Nucleus, Ribosomes, & More… Do Now 11.17 OBJECTIVE: Describe the structure and function of the eukaryotic nucleus and ribosomes TASKS: 1. What is a clone? When was the first adult mammal cloned?

Should we be afraid of the clones?

The Nucleus The nucleus is a small sphere that holds almost all of a eukaryotic cell’s DNA.

Structure & Function Structure: spherical lipid membrane (like cell membrane) that contains DNA. Function: Stores DNA, controls cell activity

It is found ONLY in EUKARYOTIC cells.

Dolly the Sheep Dolly was the first clone of an adult mammal ever made. Dolly was born in 1997, she died a few years later, younger than usual for a sheep. So what does a cloned sheep have to do with a cell nucleus?

When adult animals are cloned, it is by adding a nucleus from a cell to a new egg cell without a nucleus.

How to Make a Sheep. The Point: Change the nucleus = change the organism

nuclear envelope: A lipid bilayer that surrounds the nucleus nuclear pores: openings in the nuclear envelope

Most of the inside of a nucleus is made up of chromatin, which is a mix of DNA and related proteins.

The nucleolus is a small dark part inside a nucleus where ribosomes are made.

Find those parts: Nuclear Envelope Nuclear Pores Chromatin Nucleolus

SUPER IMPORTANT CELL PARTS: NUCLEUS STRUCTURE: Sphere in the center of a cell that contains all of the DNA FUNCTION: Controls cell functions & stores genetic information