Question

6) The Gram stain will stain bacteria on the basis of the chemistry of the: a) plasma membranes b) chromosomes c) cell wall d cytoplasmic proteins e) ribosomes 7) The Acid-Fast stain will stain bacteria on the basis of the chemistry of the a) plasma membranes b) chromosomes c) cell wall d) cytoplasmic proteins e) ribosomes 8) The morphology or shape of bacteria that are streptococcal or staphylococcal is dependant of the bacterial: a) cell wall b) plasma membrane c) movement patterns d) plane of cleavage e) growth rate 9) A bacteria ina hypotonic solution will tend to: a) shrivel b) burst c) stay the same d) begin to grow e) move around in circles 10) A bacteria in a hypertonic solution will tend to: a) shrivel b) burst c) stay the same d) begin to grow e) move around in circles

Answer 1

6.Gram staining is a method to identify different types of bacteria.This is easily identifiable by the cell wall of the bacteria.This thick layer of the cell wall makes it absorb violet and differentiate it as gram positive bacteria and those in thin layer are reddened are differentiated as gram negative bacteria.

Ans:c.cell wall

7.The acid fast stain,after staining turns into bright red color.They usually penetrate into the cell cytoplasm through cell wall and then washed out.If it is acid fast the lipoidal nature of the cell wall will prevent entering of the decolourising solution

Ans:c)cell wall

8.The shape or morphology of all bacteria are determined by the cell wall.The dtreptococcal are in linear chain while staphylococcus are in cluster.

Ans:a)cell wall

9.Bacteria which has no cell wall will allow penetration of the solution inside it and causing bursting due to hypotonic nature

Ans:b)burst