Question

Bacteria are extremely diverse in structure and in how they obtain energy and nutrients. This diversity enables bacteria to live in a wide variety of environments. Classify each statement or picture as applying to gram-positive bacteria, gram-negative bacteria, or both. Drag each item to the appropriate bin.

Answer 1

Gram staining is a technique for classifying bacteria based on differences in the structure of their cell walls. Gram-negative bacteria and gram-positive bacteria both have a plasma membrane surrounded by a cell wall that contains peptidoglycan. However, the cell wall of gram-negative bacteria is composed of a thin layer of peptidoglycan and an outer membrane, whereas the cell wall of gram-positive bacteria is composed of a thick layer of peptidoglycan. Gram-negative bacteria appear red or pink because the alcohol rinse washes away the crystal violet dye. Gram-positive bacteria appear purple because the alcohol rinse does not wash away the crystal violet dye.

Step-by-step explanation:

Answer 2

Answer and explanation:

Gram positive bacteria :

1) They retain crystal violet stain thus staining purple

2)They only produce exotoxins.

3)Peptidoglycan is thicker and multilayered

4)Techoic acids are present in their cell walls.

5)Lipopolysaccharides are absent in their cell wall.

6)No periplasmic space present

Gram negative bacteria :

1) They retain red safaranin stain thus stain pink.

2)They produce both exotoxins as well as endotoxins.

3)Peptidoglycan is thinner and single layered.

4)Techoic acids are absent in their cell walls.

5)Lipopolysaccharides are present in their cell wall.

6)Periplasmic space in present.