Module 4: Classification and Evolution

Question 1

The current classification system used by scientists is the …

This system was proposed by …

Answer 1

Three domain system

Carl Woese

Question 2

Woese’s system groups organisms based on …

3

Answer 2

differences in the nucleotide sequences of their rRNA
the lipid structure of their cell membranes
sensitivity to anibiotics

Question 3

What are the 3 domains ?

Answer 3

Archaea , Bacteria and Eukarya

Question 4

The eukarya domain contain ( ..S ) ribosomes
Eukarya RNA polymerase has ( .. ) proteins

Answer 4

80S ribosomes

RNA polymerase has 12 proteins

Question 5

The Archaea domain have ( ..S ) ribosomes
Archaea RNA polymerase contains how many proteins?

Answer 5

70S ribosomes

between 8 and 10 . depending on the organism

Question 6

The Bacteria domain have ( ..S ) ribosomes
Bacteria RNA polymerase contains how many proteins?

Answer 6

70S ribosomes

contains 5 proteins

Question 7

In Woese’s system the Prokaryotae Kingdom is split in 2 , therefore the 6 kingdoms are …

Answer 7

Archaebacteria
Eubacteria
Protoctista
Fungi
Animalia
Plantae

Question 8

Why are Eubacteria and Archaebacteria different kingdoms if they are both single celled prokaryotes ?

Answer 8

because their chemical makeup is different

Question 9

Which kingdom , Eubacteria or Archaebacteria can live in extreme conditions such as highly acidic environments or anaerobic conditions?

Answer 9

Archaebacteria