What is DNA and Where Is it Found?
DNA:
Is what type of macromolecule?
Has what function?
DNA is found inside:
What is wrong with these 2 pictures?
Chloroplast containing DNA
The error in Picture 1 (animal cell) is:
The error in Picture 2 (plant cell) is:
Let’s compare…
The Story of “Little Mito”
One day Mito heard a rumor about his past. A friend on the playground
mentioned something about his great great grandfather being in the
Prokaryote family. Mito wasn't sure what this meant, but he knew it
might be important, so he went to the library to do some research. He
never knew that genealogy could be so fascinating. But what he found
out was shocking! First he had to use his prefix-suffix sheet to
understand some new vocabulary…
Endocytosis
Break down this word using your prefix suffix sheet
Apparently, Mito had a questionable past. He almost felt
illegitimate! There was a big argument among scientists. Some
scientists claimed that Mito’s grandfather had undergone a
process called endosymbiosis.
Endosymbiosis
• Break down this word using your prefix suffix sheet
It contradicted everything that he had been taught in school about his origins!
Mito thought, "In the beginning, my great grandfather Mito wasn't part of a
family; he did EVERYTHING ALL ALONE. And Grandpa was once an aerobic
bacterium and not a Mito at all. Then one day he got eaten by a bacterial
predator and, according to this book, he was too strong for them. But he found
it was pretty cool living inside the predator. That's my Grandpa! Always looking
for a good deal. As long as he did his share for the predator and kept producing
extra energy, he was living in the lap of luxury. He didn't think of himself as a
parasite or anything, it was more like a buddy system
In which part of this passage (look for the stars) could we
substitute the term endocytosis? What about symbiosis?
Did all organelles come from endosymbiosis?
But that wasn't the end of it! The book said the predator host
did it again and maybe even again. That's how his sister Chlora
got here too. She had been a blue green alga who was
gobbled up
Mito’s sister Chlora most likely represents WHICH organelle?
A blue-green algae is most likely:
a) Autotrophic b) Heterotrophic
c) Omnivore
The Endosymbiotic Theory
• What distinguishes between an idea and a scientific theory?
Lynn Margulis – Author of “The Origin of Eukaryotic Cells”
Summing it up- TedEd
https://www.youtube.com/watch?v=9i7kAt97XYU
“How we think complex cells evolved - Adam Jacobson”
Be ready for a 3 Question QQ following the video
TedEd
QQ- Endosymbiosis
11/12
1. Give a definition of endosymbiosis
2. Which two organelles are believed to have
originated from endosymbiosis?
3. Give one piece of evidence for the endosymbiotic
theory