virus reproduction

• what is meant by a virus being described as inert


  this means that they can only replicate when in a host cell
• what are the two main types of virus reproduction cycles

  lysogenic or lytic cycles
• what is meant by the lytic cycle


  this is when viruses reproduce by using the hosts metabolism and then they are released by lysis of the host cell
• what is another name for the new viral particles made in the lytic cycle


  virions
• how do viursues imdeiatly rpeoriduce int he lytic cycle


  by copying their nucleic acids and synthesize a new coat protein
• what are the two ways in which the virions will leave the cell


  lysis and budding
• what is meant by lysis


  the cell bursts
• what is meant by budding


  this is when the virus becomes enclosed by part of the host cell membrane
• what is meant by the lysogenic cycle


  this is when viruses integrate their nucleic acid into the host cells genome with no immediate affect
• what happens in the lysogenic cycle after the viruses has integrated eth nucleic acid into the hosts genome


  they later enter the lytic cycle and cam produce symptoms such as herpes or HIV
• what factors might cause the lysogenic cycle to become active


  when a host cells comes under stressful conditions such as heat , toxic substance or a lack of nutrients
• what is the first stage of the lytic cycle


  the bacteriophage infects a cell
• what happens after the bacteriophage infects a cell(lytic cycle)


  the phages DNA circularizes remaining separated from the host DNA
• what happens after the bacteriophages DNA is in the cell (lytic cycle)


  the phages DNA replicates and new phage proteins are made and new phages are assembled
• what happens after the new bacteriophages have been made in the cell(lytic cycle)


  they cell lyses releasing the new phages
• what is the first stage of the lysogenic cycle


  the bacteriophage infects a cell
• what happens after the bacteriophage infects a cell(lysogenic cycle)


  the phages DNA becomes incorporated into the hosts genome
• what happens after the phages DNA has become incorporated into the hosts genome(lysogenic cycle)


  the cells dived and prophage DNA is passed on to daughter cells
• what happens after the prophage DNA is passed onto the daughter cells(lysogenic cycle)


  under stressful conditions the phage DNA is excises fort the bacterial chromosome and enters the lytic cycle
• by what type of reproduction cycle is the HIV virus replicated


  the lysogenic cycle
• by what reproductive cycle is cold virus or influenza replicated


  the lytic cycle