Post on 14-Dec-2015
Organelles•HOW does the
nucleus control the cell?•What is the role of
the pores?
Organelles
www.mol.biol.ethz.ch
•HOW are proteins made at the ribosome?
• If proteins are made at a ribosome, WHY have a Rough ER?
Organelles• If you have a
Rough ER, WHY do you need one of these things?
•What is the difference between a lysosome, and a vesicle? A vacuole?•Vesicles are TRANSPORT•Vacuoles are STORAGE•Lysosomes are ‘digestive’
•VACUOLE•LARGE vacuole for storage (water and/or nutrient) and structure• Plants and some single-celled animals
•SMALL for nutrient storage…. Animals•They can have many
What is being shown/made here?
Which is a secretory vesicle?
Organelles•HOW is this the
“powerhouse” of the cell?• Inheritance?
Organelles•HOW does this
‘make sugar’?• Inheritance?•MOSTLY maternal
Cytoskeleton
•Role of:microtubulemicrofilamentintermediate filament
Cytoskeleton
• Evolution of muscles?
MicrofilamentSAME protein as muscle fibers
Phospholipid Bilayer/Cell Membrane•HOW does this regulate
what comes in to and goes out of the cell?•HYDROPHOBIC • “water fearing”•HYDROPHYLIC• “water loving”
Phospholipid Bilayer/Cell Membrane
Phospholipid Bilayer/Cell Membrane•Could this be reversed?
WHY?• Fluid Mosaic – the
membrane is about the consistency of vegetable oil at room temp• Stays together, but not
rigid like a cell wall• Steroids present to keep
from freezing
Phospholipid Bilayer/Cell Membrane•What is the
role of the proteins in the membrane?•Carbohydrate
chains?
Phospholipid Bilayer/Cell Membrane
Questions?
•Objective 13• Finish for Homework