Prokaryotic Cell Structure

Question 1

what does prokaryote mean

Answer 1

• organisms lack a nucleus & lack membrane bound organelles

* genetic material in the form of a molecule of “circular” double stranded DNA

Question 2

function of prokaryotic cell was

Answer 2

• psychical barrier, excludes some substances

* protects against mechanical damage of osmotic lysis

Question 3

what is cell wall made up of in bacteria

Answer 3

murein (peptidoglygan) - a polymer of polysaccharides and proteins

Question 4

where is the cell surface membrane

Answer 4

inside the cell wall, encloses the cytoplasm

Question 5

function of cell surface membrane

Answer 5

differently permeable later, controls entry and exit of substances

Question 6

size of a ribosome

Answer 6

70S - small and simple

Question 7

function of nucleiod DNA

Answer 7

carries genetic information for replication if bacterial cells by the process of binary fission

Question 8

function of a plasmid

Answer 8

contains genes that aid survival e.g. antibiotic resistance

Question 9

function of a capsule ( a layer of mucliaginous slime around the outside of the cell wall)

Answer 9

protects other cells

helps bacteria stick together for protection

Question 10

function of flagellum

Answer 10

used for locomotion

Question 11

main biological molecule in a plasma membrane and cell wall in a prokaryote

Answer 11

• plasma membrane - phospholipid

* cell wall - muerin