Lecture 6

Question 1

what do all prokaryotes have in common?

Answer 1

they lack a nucleus and organelles

Question 2

what is the best way for identifying and classifying prokaryotes?

Answer 2

DNA/RNA analysis is most accurate

Question 3

what makes classification of prokaryotes challenging?

Answer 3

horizontal gene transfer?

Question 4

what is horizontal gene transfer?

Answer 4

movement of genes from one organism to another

Question 5

can prokaryotes be cultured and isolated?

Answer 5

no

Question 6

what was used to classify bacteria and archaea into two different domains?

Answer 6

analysis of ribosomal RNA (rRNA)

Question 7

in what way does bacteria and archaea differ?

Answer 7

the cell membrane

Question 8

3 differences in cell membrane in archaea vs. bacteria

Answer 8

1. linkage in archaea vs. ester linkage
2. fatty acid sidechains in archaea
3. phospholipid monolayer in archaea vs. bilayers in all bacteria

Question 9

does archaea use linkage or ester linkage in the cell membrane?

Answer 9

linkage?

Question 10

does bacteria use linkage or ester linkage in the cell membrane?

Answer 10

ester linkage

Question 11

does bacteria or archaea use fatty acid sidechains in the cell membrane?

Answer 11

archaea

Question 12

does archaea have a phospholipid monolayer or a bilayer?

Answer 12

phospholipid monolayer

Question 13

does bacteria have a phospholipid monolayer or a bilayer?

Answer 13

bilayer

Question 14

is bacteria or archaea closer related to eukaryotes? how do we know?

Answer 14

archaea

the rRNA sequence is more closely related

Question 15

does bacteria or archaea’s cell wall contains peptidoglycan?

Answer 15

bacteria