Practice Questions

TLS Online TPP Program

#Question id: 2001

A researcher is analyzing the immune response of a patient following the patientʹs exposure to an unknown agent while out of the country. The patientʹs blood is found to have a high proportion of lymphocytes with CD8 surface proteins. What is the likely cause?

#Section 2: General Biology

The patient encountered a bacterial infection which elicited CD8 marked T cells.
The disease must have been caused by a multicellular parasite, such as can be encountered in polluted water sources.
The CD8 proteins would be discharged from these lymphocytes to lyse the infected cells.
The CD8 proteins marked the surfaces of cytotoxic T cells to attack virus-infected host cells.