Tuesday 10 March 2020

Virology is the study of viruses – submicroscopic, parasitic particles of genetic material contained in a protein coat and virus-like agents.

Dr. Farzin Asghari Sana


Discovery of viruses  In 1884 C. Chamber land, in Pasteur's lab, discovered that if you passed a liquid containing bacter...


What are Viruses? Definition- Viruses are noncellular particles made up of genetic material and protein that can invade li...


Tobacco Mosaic Virus Wendell Stanley (1935) discovered viruses were made of nucleic acid and protein Dr. Farzin Asghari Sa...

Dr. Farzin Asghari Sana

Dr. Farzin Asghari Sana

Are Viruses Living or Non-living? Biologists consider viruses to be non-living because: -Are not cells -Do not grow or res...
General characteristics of viruses Viruses are smaller than bacteria, they range in size between 20-300 nanometer (nm) V...
General characteristics of viruses Viruses are obligate cellular parasites. They replicate only inside living cells. Vir...


Dr. Farzin Asghari Sana

Dr. Farzin Asghari Sana


Viroids ss RNA genome and the smallest known pathogens. Affects plants Prions Infectious particles that are entirely prote...
The capsid is composed of small structural units called capsomeres. The capsid protects nucleic acid from inactivation b...

Some viruses have additional lipoprotein envelope , composed of virally coded protein and host lipid. The viral envelope ...




Dr. Farzin Asghari Sana

Symmetry of viruses Viruses are divided into three groups, based on the morphology of the nucleocapsid and the arrangement...



Dr. Farzin Asghari Sana

Virion structures. Nonenveloped (naked) viruses consist of a genome surrounded by a protein shell, or capsid. Shown here i...


Dr. Farzin Asghari Sana

Assembly of the icosahedral capsid of a picornavirus. Individual proteins associate into subunits, which associate into pr...

Dr. Farzin Asghari Sana



Dr. Farzin Asghari Sana

Dr. Farzin Asghari Sana

Dr. Farzin Asghari Sana

Baltimore classification Viruses were divided into six groups based on the their nucleic acid and m-RNA production. 1- ds...


Dr. Farzin Asghari Sana

Dr. Farzin Asghari Sana
Morphology and relative size of viruses. Herpesvirus, adenovirus, poxvirus, retroviruses, and rhabdoviruses have character...

Dr. Farzin Asghari Sana


Some viruses have enzymes inside the virion. All ss- RNA viruses with negative polarity have the enzyme transcriptase ( R...



VIROLOGY


Virus













on

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)