VIRUSES - THE STRUCTURE OF VIRUSES

Mikrobiologists first observed viruses
1. in 1940s
2. in 1920s
3. in 1840s
Viruses are not able to
1. grow and divide independently
2. infect a human
3. penetrate into organisms through the skin
The size of viruses is
1. 20 – 300 nm
2. 20 – 300 mm
3. 20 – 30 nm
Viruses are
1. smaller than ribosomes in the eukaryotic cell
2. larger than ribosomes in the eukaryotic cell
The structure of viruses - viruses are built up from
1. DNA or RNA > never both of them simultaneously
2. DNA
3. RNA
Protein coat is also called
1. capsid
2. capsomere
3. virion
Which cycle is ended with a lysis (falling apart) of a cell and release of reproduced viruses?
1. lytic cycle
2. lysogenic cycle
3. no one
Viral DNA which became a part of DNA of host cell is called
1. provirus
2. virion
3. capsid
An example of latent viral infection is
1. herpes
2. hepatitis
3. measles
The special enzyme overwriting genetic information from RNA into DNA is
1. reverse transcriptase
2. reverse replicase
3. reverse virosis