Exam (elaborations)
PYC2605 Exam Practice Questions & Answers
- Institution
- University Of South Africa (Unisa)
This document consists of 3 Practice question papers. The answers for all three can be found at the end of the document.
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PYC2605HIV AND AIDS Care & Counselling
QUESTION PAPER 1
QUESTION 1
Luc Montagnier from France is credited for the discovery of the HI virus in the year (a) ____, while
Robert Gallo from the USA is credited for developing the first HIV antibody test in the year (b) ____.
(1) (a) 1983; (b) 1985
(2) (a) 1985; (b) 1990
(3) (a) 1983; (b) 1990
(4) (a) 1981; (b) 1985
QUESTION 2
We know how many people are infected with HIV by looking at the HIV incidence and the HIV
prevalence. What is the definition of HIV incidence?
(1) It is the percentage of people living with HIV (as a proportion of the total population) at a specific
time.
(2) It is a ‘snapshot’ view of the current number of people infected with HIV.
(3) It is the percentage of new cases of HIV infection in a defined period of time, for example in one
year.
(4) It is a percentage which is calculated by dividing the number of people living with HIV by the
number of the total population.
QUESTION 3
The reason why HIV is so dangerous to human beings is because HIV ‘hijacks’ the most important
cells in the immune system, namely the (a) ____, and ‘forces’ them to (b) ____.
(1) (a) CD4+T cells; (b) manufacture more HI viruses
(2) (a) macrophages; (b) kill all other invading organisms
(3) (a) T helper cells; (b) change the viral DNA to viral RNA
(4) (a) antibodies; (b) stop initiating their chemical reaction which kills viruses
QUESTION 4
T cells cannot recognise pathogens if their antigens have not first been processed into smaller
pieces. These smaller pieces (also called ‘epitopes’) are then introduced to the T cells by
(1) memory B cells.
(2) white blood cells.
(3) antigen-presenting cells.
(4) the specific defences of the immune system.
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