Elaboration 2025/2026
HIV is what type of virus that uses RNA as its genetic material instead of the ore usual
DNA?
A) Oncovirus
B) Circovirus
C) Retrovirus
D) Herpesvirus - Answer--Retrovirus
Symptoms are likely to begin appearing and the person is vulnerable to opportunistic
infections and certain tumors when the number of T4 cells drops below which level?
A) 200/cubic millimeter
B) 400/cubic millimeter
C) 600/cubic millimeter
D) 800/cubic millimeter - Answer--200 cubic/millimeters
Which of the following is the most common route of transmission of the HIV virus in
developing countries?
A) Homosexual relations
B) Heterosexual relations
C) Sharing of needles
D) In utero transmission - Answer--heterosexual relations
Retroviruses have long been known to cause ____________ in animals -
Answer--cancer
Zidovudine (AZT) was approved by the Food and Drug Administration in the year
__________ - Answer--1987
, The _____________ held a meeting with vaccine researchers in march 2008 to
reassess whether an HIV vaccine will ever be possible and what new approaches could
be tried - Answer--National Institute of Health (NIH)
In ________, Stanley Prusiner won the Noble Prize for his controversial theory that
Creutzfeldt-Jakob disease is caused by particles called prions, which contain protein but
no nucleic acid and thus no traditional genetic material - Answer--1997
True or False? Transfusion with HIV-contaminated blood is no longer a significant
source of HIV infection in the United States. - Answer--True
True or False? Testing a baby's blood for HIV antibodies provides evidence of the
mother's HIV status. - Answer--True
True or False? Investigators trying to track the early spread of HIV found HIV-infected
blood samples from as early as 1956, in the blood of a widely traveled Norwegian sailor
who died of immune deficiency. - Answer--False
The growth of the __________________, which sponsors most of the biomedical
research in the United States, has reflected the growth of concern about chronic
degenerative diseases. - Answer--National Institute of Health
In the year _______, Congress created the National Cancer Institute. - Answer--1937
Much of the research on HIV has been done using ____________________, and a
great deal has been learned. - Answer--cultured human cells
The ___________ estimates that almost one-third of cancer deaths in the United States
are due to tobacco use. - Answer--American Cancer Society
True or False? In most cases, chronic diseases have a single cause, making it easier
for scientists to recognize significant risk factors and establish preventive measures. -
Answer--False
True or False? Epidemiology is generally limited to observation and analysis of events
that occur spontaneously - Answer--True
True or False? In experiments on human subjects, scientists can carefully control the
conditions so that cause-and-effect relationships can be clearly proven - Answer--False