VIRUS PATHOGENICITY AND REPRODUCTION

Question 1

lytic cycle (2)

Answer 1

• virus reproduces using host metabolism to copy nucleic acids & synthesise new coat pattern
• released via lysis (bursting) or budding (using an envelope)

Question 2

lysogenic (3)

Answer 2

• integrate their own nucleic acid into host genome
• may be there for many generations with no effect
• enter the lytic cycle later, when they produce symptons

Question 3

how are viruses pathogenic (4)

Answer 3

• cell lysis
• toxins, i.e causing cell/chromosome fusion
• cell transformation, can trigger cancer in cells
• immune suppression