Prokaryotic Cells

Question 1

Structure of general prokaryotic cells

Answer 1

• cell wall
• cell membrane
• capsule
• flagellum
• plasmid
• genetic material
• cytoplasm
• ribosomes

Question 2

Functions of cell wall in pro.c

Answer 2

• made up of muerin (peptidoglycan)
• act as physical barrier that excludes certain substances and protect against mechanical damage and osmotic lysis

Question 3

Function of plasmids

Answer 3

• involve genes that may help the survival of bacteria e.g. antibiotics
• can reproduce independently, may give them resistance to antibiotics
• it is used extensively as vectors in genetic engineering

Question 4

Difference between pro.c vs euka.c

Answer 4

• no nucleus vs with nucleus
• DNA not associate with protein vs do associate
• smaller ribosomes 70s vs 80s
• murein cell wall vs cellulose cell wall

Question 5

Viruses structure

Answer 5

• contains nucleic acid
• can only reproduce in living host cell
• enclose with capsid, can be identified and attach to host cells