Cells and Cell Structures

Bell Work•FINISH the table from yesterday•Get out your answers to Obj 14 and 15

Review Obj 14 and 15•“…best characteristics, you can tell them that you get your mitochondria from Mom!”•Anything wrong with that statement?•Where do you get your “characteristics”?• I just want you to look at information critically

Obj. 12•Ready…. GO!•Another example of structures getting used for different function•We’ll see that often

This is important…• If mitochondria and chloroplasts were once their own cells, what should be TRUE about:•DNA?•Their membranes (draw it out if you need to)•and their relatedness to “their cell” vs bacteria (think about it)

This is important…• If mitochondria and chloroplasts were once their own cells, what should be TRUE about:•DNA – DNA is ‘bacteria-like’, circular, etc•Their membranes – TWO membranes and inner membrane is ‘bacteria-like’ (made of same components)•and their relatedness to “their cell” vs bacteria (think about it)

ONE Example•Chloroplast DNA from a EUKARYOTE• Is most closely related to PROKARYOTE DNA

ONE Example• SO, the DNA in the

chloroplast of a EUKARYOTE is more closely related to DNA of bacteria than it is to the DNA in ITS OWN NUCLEUS•Common throughout

plants• Similar results for

Mitochondria

This is important…• If mitochondria and chloroplasts were once their

own cells, what should be TRUE about:•What ELSE can cells do? Cell theory?• Yep! When removed from the cell, mito and c-plasts

can replicate on their own!

Obj 19 – Bacteria and Plant Cell Walls• Plant Cell walls are made of?•Cellulose – Glucose is monomer•Bacteria Cell Walls:•Basically glucose, galactose (and other

monosaccharide) monomers put together a little differently•Both mostly glucose

Obj 19 – Bacteria and Plant Cell Walls•BUT the cell wall and the cell capsule protect

bacteria pretty well•Antibiotics target the capsule and wall.• LOTS of variations of capsule and wall among

bacteria•Different antibiotics

HOMEWORK• Three questions you have on Objectives