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Compare the lytic and lysogenic cycles and explain which cycle has the potential to produce the most virions. a. The lytic cycle can theoretically produce more virions as the viral genome is incorporated into the host cell’s genome replicating along with the host cell. b. The lysogenic cycle can theoretically produce more virions as the reproductive cycle of viruses undergoing lysogeny is much faster than the reproductive cycle of viruses following lytic cycle. c. The lysogenic cycle can theoretically produce more virions as the viral genome is incorporated into the host cell’s genome replicating along with the host cell. d. The lytic cycle can theoretically produce more virions as the prophage following lysogenic cycle ultimately gets excised from the host cell’s genome and enter the lytic cycle

Step by step solution

01

Understand the Lytic Cycle

The lytic cycle is a process wherein a virus infects a host cell, takes over its machinery to replicate its genome, produces new viral particles (virions), and ultimately causes the host cell to burst (lyse), releasing new virions.

02

Understand the Lysogenic Cycle

The lysogenic cycle involves the integration of the viral genome into the host cell's DNA, where it remains dormant as a prophage. The viral genome replicates along with the host cell division without causing immediate harm. Under certain conditions, the prophage may get excised and the virus might enter the lytic cycle.

03

Identify the Key Difference in Virion Production

In the lytic cycle, the virus immediately replicates and produces a high number of virions within a short period by lysing the host cell. In contrast, the lysogenic cycle allows for viral genome replication alongside the host cell's genome but does not produce new virions until it eventually enters the lytic cycle.

04

Analyze the Potential for Virion Production

Given the lysogenic cycle does not produce new virions until it transitions to the lytic cycle, and considering that a single host cell can be used to generate multiple virions in a shorter time frame during the lytic cycle, the lytic cycle has the potential to produce more virions in a direct and rapid manner.

05

Determine the Correct Answer

The correct answer is (d): The lytic cycle can theoretically produce more virions as the prophage following lysogenic cycle ultimately gets excised from the host cell’s genome and enters the lytic cycle.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

viral replication

Viral replication is the process through which viruses create copies of themselves. This replication process is essential for virus propagation and typically occurs inside a host cell. Depending on the virus, there are different stages and methods involved in viral replication. Most viruses use either the lytic or lysogenic cycle to replicate their genetic material. Understanding these cycles helps explain how viruses multiply and spread.

lytic cycle

In the lytic cycle, a virus attaches to a host cell and injects its genetic material. This genetic material then takes over the host's cellular machinery to replicate the viral genome and produce new viral particles, known as virions. Once a significant number of virions are created, the host cell bursts open (lyses), releasing these new virions to infect other cells. The lytic cycle is efficient in making a large number of virions in a relatively short amount of time. Therefore, it can lead to rapid viral propagation.

lysogenic cycle

The lysogenic cycle is significantly different from the lytic cycle. Here, the virus integrates its genetic material into the host cell's DNA, becoming a part of the host's genome. This integrated viral genome is called a prophage. Rather than immediately taking over the host's cellular machinery to produce virions, the prophage remains dormant and is replicated along with the host cell's DNA during cell division. This means the viral information is passed on to new cells without causing the cell to lyse. Eventually, under certain conditions, the prophage can exit the host genome and the virus may reenter the lytic cycle.

virion production

Virion production refers to the creation of complete, infectious virus particles. The lytic cycle is characterized by its high and quick virion production, as it takes control of the host cell and rapidly produces new virions, which are then released when the cell lyses. In contrast, the lysogenic cycle does not produce new virions until it transitions to the lytic cycle. Therefore, while the lysogenic cycle can spread viral genetic material to many cells over time, the immediate production of new virions is much slower compared to the lytic cycle. This makes the lytic cycle theoretically more efficient for producing a high number of virions quickly.