Lab #7

Question 1

Bacteria are _________ microorganisms

Answer 1

Prokaryotic

Question 2

Pathogenic bacteria

Answer 2

Bacteria that causes illness

Question 3

DNA of a bacterial cell

Answer 3

Circular chromosome in nucleoid

Question 4

Plasmids

Answer 4

Small, circular double-stranded DNA molecules

Question 5

Capsules interaction with antibiotics

Answer 5

They are more resistant to antibiotics

Question 6

Peptidoglycan is composed of

Answer 6

Amino acids and disaccharides

Question 7

Gram positive bacteria

Answer 7

Very thick peptidoglycan layer; violet color because their peptidoglycan can retain the stain

Question 8

Gram negative bacteria

Answer 8

Very thin peptidoglycan layer + lipopolysaccharide layer; red color when stained because they don’t absorb the purple

Question 9

The cell walls composition influences

Answer 9

susceptibility to different antibiotics

Question 10

Antibiotics either

Answer 10

Destroy bacteria or inhibit their growth

Question 11

Bactericidal antibiotic

Answer 11

Kills the bacteria by interfering with the formation of the bacterium’s cell wall

Question 12

Bacteriostatic

Answer 12

Stop bacteria from multiplying

Question 13

Antibiotics target which parts of the cell?

Answer 13

DNA replication, RNA synthesis, Cell wall synthesis, and protein synthesis

Question 14

Broad spectrum antibiotics (like penicillin: ampicillin and amoxicillin)

Answer 14

Effective against both gram + and gram - bacteria

Question 15

Narrow-spectrum antibiotic

Answer 15

Act against specific families of bacteria

Question 16

Antibiotic sensitivity test

Answer 16

Tests the effectiveness of different types of bacteria on two different species of bacteria

Question 17

Area where the bacteria doesn’t grow

Answer 17

Zone of inhibition

Question 18

Standard interpretation chart

Answer 18

Categorize bacterium as susceptible, intermediately susceptible, or resistant