Viruses Review And Study Quiz

If a virus is virulent, it means that it is highly infectious and capable of causing severe disease. The lytic cycle is a type of viral replication cycle where the virus infects a host cell, takes over its machinery to produce more viruses, and eventually causes the cell to burst, releasing the newly formed viruses. Therefore, it can be inferred that a virulent virus would undergo the lytic cycle to spread and cause harm to the host.

A virus infects a living thing by entering a host cell and hijacking its protein-making system. Viruses are unable to replicate on their own, so they rely on host cells to reproduce. Once inside a host cell, the virus releases its genetic material and takes control of the cell's machinery, forcing it to produce new viral components. These components are then assembled into new viruses, which can go on to infect other cells and continue the cycle of infection. This process allows the virus to spread and cause harm to the host organism.

The correct answer is "Virus DNA joining with Host DNA." This is because viruses are known to infect host cells by injecting their DNA into the host's DNA. This integration allows the virus to utilize the host's cellular machinery to replicate and produce more viruses. By joining with the host DNA, the virus ensures its survival and propagation within the host organism.

There is still a chance that you can aquire an infection, even if the chance is very slight.

The correct answer is the Lysogenic Cycle. In the Lysogenic Cycle, the virus integrates its genetic material into the host cell's DNA and remains dormant for a period of time. During this time, the viral DNA is replicated along with the host cell's DNA during cell division. The virus does not immediately cause cell lysis or destruction. Instead, it can remain in the host cell for an extended period, and under certain conditions, it can switch to the Lytic Cycle, where it starts replicating and causes the host cell to burst, releasing new viral particles.

Virus does not mean death, infection, or bacteria. While viruses can cause infection, the term "virus" itself refers to a microscopic infectious agent that replicates inside the cells of living organisms and can cause a variety of diseases. The term "poison" is the closest definition to describe the nature of a virus as it refers to a substance that can cause harm or illness when introduced into the body.

Viruses only attack living things, specifically cells. They cannot infect or take over bacteria, which are considered nonliving. Therefore, the statement is false.

Viruses are classified based on their shapes. Different viruses have distinct shapes such as spherical, rod-shaped, or helical. This classification is important as it helps scientists identify and categorize different types of viruses. The shape of a virus is determined by its genetic material and the proteins that make up its outer shell. By studying the shapes of viruses, scientists can better understand their structure, function, and how they interact with host cells. Therefore, shapes play a crucial role in the classification of viruses.

The Host cell undergoes Mitosis, not Miosis.

In the lytic cycle, adsorption is the first step. Adsorption refers to the attachment of the bacteriophage (a virus that infects bacteria) to the surface of the host bacterium. This attachment is essential for the subsequent steps of the lytic cycle to occur, such as entry of the viral genetic material into the host cell, replication of the viral genome, assembly of new viral particles, and ultimately, lysis of the host cell to release the newly formed viruses. Therefore, adsorption is the correct answer for the first step of the lytic cycle.

This statement suggests that nucleic acid is located within the capsid. The capsid is a protective protein shell that surrounds the nucleic acid in viruses. This arrangement is characteristic of many viruses, where the nucleic acid is enclosed within the capsid, providing protection and stability to the genetic material.

The capsid is the protein part of a virus. It is the outer protective layer that encloses the genetic material of the virus. The capsid plays a crucial role in protecting the genetic material from the environment and facilitating the virus's entry into host cells. It also helps in the attachment of the virus to host cells and assists in the release of the genetic material into the host cell once infection occurs. Therefore, the protein part referred to in the question is the capsid.

Viruses are composed of nucleic acids, which can be either DNA or RNA, and proteins. The nucleic acid contains the genetic information of the virus, while the proteins form the protective coat around the nucleic acid. This coat, known as the capsid, helps to protect the genetic material and allows the virus to attach to and infect host cells. The combination of nucleic acids and proteins is essential for the structure and function of viruses.

The four main ways to help prevent viral infections are to vaccinate, wash hands, practice safe sex, and cover mouth when coughing. Vaccination helps build immunity against specific viruses, reducing the risk of infection. Washing hands with soap and water or using hand sanitizer helps remove viruses from the hands, preventing their spread. Practicing safe sex, such as using condoms, reduces the risk of sexually transmitted viral infections. Covering the mouth when coughing or sneezing helps prevent the spread of respiratory viruses through respiratory droplets. By following these preventive measures, the chances of viral infections can be significantly reduced.