Gram-positive bacteria are colored purple when the gram stain binds to which composes their thick cell wall

Gram-positive bacteria are colored purple when the gram stain binds to the peptidoglycan, which composes their thick cell wall. In staining, it is the presence of such molecule of some bacteria that is being used in advantage in order to identify or classify a certain bacteria. 

The virus is considered to be are living item since they have hereditary material dnas or rnas. they can imitate and change. they respond to boosts, for example, radiation, chemicals, and warmth. they have antigenic properties. they are proficient to duplicate with a same hereditary constituent.