Lysogenic Cycle
Question 1: Which viruses follow the lysogenic cycle?
Answer:
Bacteriophages are viruses that infect and multiply in bacteria. Temperate phages (such as lambda phage) can replicate using both lytic and lysogenic cycles.
Question 2: What triggers lysogenic to lytic?
Answer:
When prophage-bearing bacteria are exposed to stressors such as UV light, nutrient deficiencies, and chemicals such as mitomycin C, prophages are naturally extracted from the host genome and can enter the lytic cycle in a process called induction.
Question 3: How do viruses reproduce the lysogenic cycle?
Answer:
These viruses break down or lyse cells and spread to other cells to continue the cycle. Similar to the lytic cycle, in the lysogenic cycle the virus attaches to host cells and injects its DNA. From there, the viral DNA integrates into the host’s DNA and cells.
Question 4: What is the advantage of a lysogenic cycle?
Answer:
The lysogenic cycle allows phages to replicate without killing the host.
Question 5: Which stage of the virus occurs first?
Answer:
The first stage is an entry. The entry includes an attachment, where the virus particle encounters a host cell and attaches to the cell surface, entry, where the virus particle reaches the cytoplasm, and exposure, where the virus releases the capsid.
Question 6: How are lysogenic viruses different from lytic viruses?
Answer:
The main difference between lysogenic and lysogenic cycles is that the lysogenic cycle does not destroy host cells whereas the lysogenic cycle destroys host cells. The viral DNA destroys the host cell’s DNA, halting the cell’s function in the lytic cycle. However, in the lysogenic cycle, viral DNA can fuse with host DNA.
Lysogenic Cycle
A virus is an infectious submicroscopic organism that only reproduces inside living cells. All living things, including plants, animals, and microbes like bacteria and archaea, are susceptible to virus infection. Since Dmitri Ivanovsky’s 1892 publication revealing a non-bacterial pathogen infecting tobacco plants and Martinus Beijerinck’s 1898 discovery of the tobacco mosaic virus, more than 9,000 virus species—out of the millions of different types of viruses in the environment—have been documented in detail. Viruses are the most common sort of living organism and can be found in practically all ecosystems on Earth. Virology is the study of viruses; it is a branch of microbiology.