Lecture 4- Prokaryotic Cells

Question 1

bacterial cell structure
They have:

Answer 1

do not have membrane-bound organelles
-fimbrae
-circular DNA
-ribosomes
-cell wall
-cell membrane
-flagella

Question 2

bacterial flagellum function

Answer 2

allows bacterial swimming as it rotates like a corkscrew

Question 3

bacterial cell walls function

Answer 3

prevent osmotic lysis, cell defence, permeability barrier and structure

Question 4

gram positive

Answer 4

-thick layer of peptidoglycan

Question 5

gram negative

Answer 5

thin layer of peptidoglycan surrounded by an LPS layer

Question 6

function of antibiotics

Answer 6

kill bacterial pathogens by targetting bacterial specific structures such as cell walls and ribosomes

Question 7

fimbrae

Answer 7

small-hair like attatchements

Question 8

biofilm

Answer 8

bacteria secrete a mucous/slimy dome in which other bacteria colonize within it

Question 9

microbiome

Answer 9

colection of microbes on and in our body

Question 10

colonization of microbes

Answer 10

-microbes come from environment
-primary source is the birth canal

Question 11

purposes of normal flora/human microbiome

Answer 11

1. protection of pathogens
2. developmental progress
3. provide vitamins and nutrients
4. aid in digestion
5. modulates the immune system