NEET BIOLOGY

BIOLOGICAL CLASSIFICATION

VIRUSES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Cold sores are caused by a virus that can live dormant in your cells for many years as a part of your DNA. The virus can be activated by stress or low immune function, even years after you were exposed to the virus. What type of reproductive cycle does this virus have?
A
Lytic cycle
B
Lysogenic cycle
C
Retrovirus cycle
D
Not a virus at all; bacterial life cycle
Explanation: 

Detailed explanation-1: -What causes cold sores? Cold sores are caused by the herpes simplex virus. Once the herpes simplex virus is in you, it can cause outbreaks of cold sores. Cold sore outbreaks are often triggered by exposure to hot sun, cold wind, a cold or other illness, a weak immune system, or even stress.

Detailed explanation-2: -About cold sores They’re caused by the herpes simplex virus and usually clear up without treatment within 7 to 10 days. You may not have any symptoms when you first become infected with the herpes simplex virus. An outbreak of cold sores may happen some time later.

Detailed explanation-3: -Once a child is infected with the herpes simplex virus, the virus becomes inactive (dormant) for long periods of time. It can then become active at any time and cause cold sores. The cold sores usually don’t last longer than 2 weeks. Hot sun, cold wind, illness, or a weak immune system can cause cold sores to occur.

Detailed explanation-4: -Research has identified a gene called Cold Sore Susceptibility Gene-1² (CSSG-1), which appears to affect vulnerability to frequent cold sores. Certain haplotypes (sets of genetic determinants located on a single chromosome) of this gene are associated with more frequent and severe episodes.

There is 1 question to complete.