AP Bio 2.11

Question 1

Both cell types (eukaryotic and prokaryotic) possess…

Answer 1

A plasma membrane

Question 2

What do prokaryotic cells lack?

Answer 2

Membrane enclosed structures/membranes other than its plasma membrane

However they do have a nucleoid region that conatins the cells genetic m

Question 3

What do eukaryotic cells possess?

Answer 3

Additional internal membranes as well as membrane bound organelles that compartmentalizes the cell

Genetic material is enclosed in a membrane bound nucleus

Question 4

How are the nucleus and the ER theorirized to have evolved?

Answer 4

They are thought to be once a part of the inner foldings of the plasma membrane

Question 5

What is mitochondria thought to be evolved from?

Answer 5

They’re thought to be once free living prokaryotic cells living in endosymbosis with the eukaryotic cell. (Engued by an anaerobic cell through endocytosis.)

It’s throught to be more or less the same for chloroplasts except

for the fact that it’s photosynthetic

Question 6

What are the pieces of evidence that support the theory of endosymbiosis (regarding mitochondria and chloroplasts)?

Answer 6

1. They both have double membranes (evidence for being engulfed in endocytosis)
2. They both have circular DNA (like prokaryotes)
3. They both contain their own ribosomes