4.3.3 Classification of the Three Domains

Question 1

What are the 2 types of cell

Answer 1

Prokaryotic - Lack nucleus
Eukaryotic - Have nucleus and compartmentalised structures, genetic material separated from rest of the cell

Question 2

What are the 3 domains of life

Answer 2

• Bacteria (prokaryotes)
• Archaea (prokaryotes)
• Eukarya (eukaryotes)

Question 3

Archaea notes

Answer 3

• Prokaryotic
• Unique lipids in membrane (ester linkages)
• No peptidoglycan in cell wall
• Different ribosome structure (70s ribosomes’ primary structure and base sequence of RNA more similar to eukarya)

Question 4

Bacteria notes

Answer 4

• Prokaryotic
• Replicate via binary fission
• 70s ribosomes

Question 5

Eukarya notes

Answer 5

• Eukaryotic
• Divide by mitosis
• Asexual or asexual reproduction