B1.1.2 Bacterial Cells

Question 1

Unicellular organisms

Answer 1

consist of just one cell

Question 2

Examples of prokaryotes

Answer 2

Escherichia coli = causes food poisoning
Streptococcus bacteria = causes soar throat
Streptomyces = found in soil

Question 3

Antibiotic streptomycin

Answer 3

comes from bacteria Streptomyces = kills many disease-causing bacteria

Question 4

Cell wall in bacteria cell

Answer 4

made of peptiodolgycan which holds the cell together and protects it

Question 5

Genetic material in bacteria cell

Answer 5

floats freely in cytoplasm

only long strand of DNA called bacterial chromosome (normally circular)

Question 6

Bacterial cells all contain…

Answer 6

a cell membrane
a cell wall
genetic material

Question 7

Bacterial cells can contain adaptations such as…

Answer 7

flagella
pili
slime capsule
plasmid

Question 8

Flagella

Answer 8

taillike structures

allow cell to move through liquids

Question 9

Slime capsule

Answer 9

outside cell wall
protects bacterium from from drying out
protects bacterium from poisonous substances
helps bacteria stick to smooth surfaces

Question 10

Pili

Answer 10

tiny hairlike structures
enables cell to attack to structures
used to transfer genetic material between bacteria

Question 11

Plasmid

Answer 11

circular piece of DNA = used to store extra genes
genes normall not needed for bacterium’s day to day survival - may help in time of stress

where antibiotic genes are found