BIOLOGICAL CLASSIFICATION
VIRUSES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
tail
|
|
|
nucleus
|
|
|
capsid
|
|
|
lipid
|
Detailed explanation-1: -A virus is made up of a DNA or RNA genome inside a protein shell called a capsid. Some viruses have an external membrane envelope.
Detailed explanation-2: -A capsid is the protein shell of a virus, enclosing its genetic material. It consists of several oligomeric (repeating) structural subunits made of protein called protomers.
Detailed explanation-3: -Viruses contain genetic material which is either RNA or DNA. No virus contains both RNA and DNA. Further, this genetic material is of 4 types double-stranded DNA, single-stranded DNA, double-stranded RNA, single-stranded RNA.
Detailed explanation-4: -Viruses contain genetic material that is enclosed in a protein coat. The genetic material can be either RNA or DNA.
Detailed explanation-5: -Reverse transcription is found in retroviruses. DNA was believed to be the sole medium for genetic information storage. Furthermore, Watson and Crick’s central dogma assumed that information flowed “one-way” from DNA to RNA to protein.