prokaryotes

Question 1

What is the inner layer of a bacterial cell called?

Answer 1

cell surface/plasma membrane

Question 2

What is the middle layer of a bacterial cell called?

Answer 2

cell wall

Question 3

What is the outer layer of a bacterial cell called?

Answer 3

capsid protection

Question 4

What is the cell wall made from?

Answer 4

peptidoglycan - only in prokaryotes

Question 5

What do plasmids do?

Answer 5

circular loops of DNA
- they have genes on to help antibiotic resistance ( prokaryotes can share these genes)

Question 6

What is free chromosomal dna ?

Answer 6

• chromosome/nucleoid
• free in cytoplasm

Question 7

What are pilli?

Answer 7

• hair like structures
• role in movement
  -adherence to surfaces

Question 8

What are the ribosomes in prokaryotes called?

Answer 8

70S ribosomes

Question 9

What do prokaryotes not have?

Answer 9

• membrane bound organelles (chloroplasts,mitochondria)
• histones
  -nucleus

Question 10

What is the endosymbiosis theory and what evidence supports this theory?

Answer 10

-Theory—-> organelles (chloroplasts and mitochondria) were once free-living prokaryotic cells
- mitochondria and chloroplasts have:
Circular DNA, No histones, 70S ribosomes, very small like bacteria