Herpes simplex virus (HSV) enters the human body and remains...

Herpes simplex virus (HSV) enters the human body and remains dormant in the nervous system until it produces an outbreak after exposure to heat, radiation, or other stimuli. Which of the following statements correctly describes HSV? a. While it remains dormant in the nervous system, the virus is in its lytic cycle. b. During an outbreak, the virus is in the lysogenic cycle. c. Herpes simplex virus adds its genetic information to the genetic information of the cell. d. The herpes simplex virus contains a tail sheath and tail fibers.

Herpes simplex virus (HSV) enters the human body and remains dormant in the nervous system until it produces an outbreak after
exposure to heat, radiation, or other stimuli. Which of the following statements correctly describes HSV?
a. While it remains dormant in the nervous system, the virus
is in its lytic cycle.
b. During an outbreak, the virus is in the lysogenic cycle.
c. Herpes simplex virus adds its genetic information to the
genetic information of the cell.
d. The herpes simplex virus contains a tail sheath and tail
fibers.

Key Concepts

Lytic and Lysogenic Cycles

The lytic cycle is a viral reproductive cycle that results in the destruction of the host cell as new virions are produced and released. In contrast, the lysogenic cycle involves the integration of the viral genome into the host’s genome (or maintenance as an episome), allowing it to replicate along with the cell without immediately harming it. These concepts are essential for understanding how viruses manage periods of active infection versus dormancy.

Viral Genome Maintenance

Some viruses maintain their genome within the host cell nucleus without integrating into the host's chromosomal DNA. Instead, the viral genome persists as an episome. This mechanism is crucial for the concept of latency, as it allows the virus to avoid immune detection and reactivate when favorable conditions occur.

Viral Latency

Viral latency refers to a state in which a virus remains in a dormant form within its host after the initial infection. During latency, the virus is present within specific cells without causing immediate symptoms or cell death, and it can later reactivate under certain stimuli, leading to renewed replication and clinical disease.

Viral Structural Features

Virus structure plays a critical role in viral classification and function. Enveloped viruses, such as those that can establish latency, typically have a lipid membrane and lack structures like tail sheaths and tail fibers, which are characteristics of many bacteriophages. Understanding these structural differences is important in distinguishing between different types of viruses and their replication strategies.

Transcript

Please give Ace some feedback