Download The Nucleus

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