viruses

Question 1

what is one thing that all viruses must contain

Answer 1

Outer protein called a caspid and a core nucelic acid

Question 2

describe the lambda bacteriophage

Answer 2

-E.coil
-The structure of the capsid is may sided with a taik and tail fibres
-Double stranded DNA

Question 3

Tobacco mosaic virus

Answer 3

They are viruses only found in plants
Spiral polypeptide ,the shape of their capsid
The nucleic acid is a single straned RNA

Question 4

Ebola Virus

Answer 4

Human
Twisted tube shape is the outer structre of their capsid and is also contains a single stranded RNA

Question 5

HIV

Answer 5

The host for the HIV virus is humans ,its virus has a spherical capsid shape and the nucleic acid is single stranded ,RNA .

Question 6

Describe the lytic cycle

Answer 6

The virus inserts its DNA into the cytoplams of the host cell,therefore the viral genome is replicated independently from the host cells genome .This leads toe lysis of the host cell,when a larger number of viruses are assembled and ready to infect more cells

Question 7

What is the latency/lysogenic pathway

Answer 7

The nucleitic acid of the virus has incorporated into the DNA ,they insert their DNA in the form of a provirus into the DNA of the host cell which enables the viral DNA to be replicated via cell division of the host cell .The provirus can stay dormant if the virus produces repressor proteins which inhibit the transcription of the provirus .