Prokaryotic Cells topic 1.2

Question 1

Prokaryotic Cell structure

Answer 1

Prokaryotes are organisms whose cells lack a nucleus
* They belong to the kingdom Monera (i.e. bacteria)
* A single, circular DNA molecule (genophore)
* A peptidoglycan cell wall and 70S ribosomes

Question 2

Prokaryotic cells may contain

Answer 2

• Pili (for attachment or bacterial conjugation)
• Flagella (a long whip-like tail for movement)
• Plasmids (autonomous DNA molecules)

Question 3

Prokaryotic and eukaryotic cells differ
according to a number of key features: DORA

Answer 3

• DNA (composition and structure)
• Organelles (types present and sizes)
• Reproduction (mode of cell division)
• Average Size (exceptions may exist)

Question 4

Prokaryotes divide via a process of asexual reproduction known as binary fission, in this process…

Answer 4

• The circular DNA is copied
• The DNA loops attach to the membrane
• The cell elongates, separating the loops
• Cytokinesis occurs to form two cells