Biological Classification - Online Test
Q1. Genetic material for retrovirus is
Answer : Option C
Explaination / Solution:
The virus in which genetic material is RNA are called retrovirus. In this virus reverse transcription takes place to form DNA that synthesis proteins.
Q2. The three domains system do not includes
Answer : Option A
Explaination / Solution:
Three kingdom or domain system of classification do not includes viral domain. Virus were discovered after invention of electron microscope so, they were not the part of living world.
Q3. Identify the cuboidal virus from the following
Answer : Option B
Explaination / Solution:
Virus consists of genetic material (DNA or RNA) surrounded by protein capsules. They are of different shapes and size. Polymyelitis virus is cubical in shape.
Q4. The organism that completely lack a cell wall and are smallest living cell know, can survive without oxygen is
Answer : Option D
Explaination / Solution:
Mycoplasmas are group of organism that lack cell wall and are smallest living organisms. They can survive without oxygen. Mycoplasmas are also called as PPLO (pleuro pneumonia like organism).
