Fig. 1 shows a flow diagram for a virus entering human cells in the nose. The virus attaches to a cell surface, genetic material enters, and new virus parti...
Question 1 Report
Fig. 1 shows a flow diagram for a virus entering human cells in the nose. The virus attaches to a cell surface, genetic material enters, and new virus particles are released. A patient has sneezed into a tissue and then placed it in a covered bin.
(a) Describe what happens at the replication stage. [2]
(b) Suggest why antibiotics cannot stop this viral infection. [2]
(c) Use the information about the tissue to suggest how the patient reduces transmission. [1]
Answer Details
(a) At replication, viral genetic material uses the host cell's machinery to make many new virus particles. Viruses cannot reproduce independently of host cells. [2]
(b) Antibiotics act against bacteria, not viruses. Viruses reproduce inside host cells and do not have the bacterial cell structures or processes targeted by antibiotics. [2]
(c) Sneezing into a tissue catches droplets containing virus. Putting the tissue in a covered bin reduces other people's contact with those droplets, lowering transmission. [1]
Download The App On Google Playstore
Everything you need to excel in your exams
