Which replication steps do animal viruses and bacteriophages have in common?

Asked By: Rajae Nicola | Last Updated: 13th May, 2020
Category: medical health cold and flu
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Bacteriophages have a lytic or lysogenic cycle. The lytic cycle leads to the death of the host, whereas the lysogenic cycle leads to integration of phage into the host genome. Bacteriophages inject DNA into the host cell, whereas animal viruses enter by endocytosis or membrane fusion.

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Thereof, how do animal viruses replicate?

Viral replication involves six steps: attachment, penetration, uncoating, replication, assembly, and release. During release, the newly-created viruses are released from the host cell, either by causing the cell to break apart, waiting for the cell to die, or by budding off through the cell membrane.

Secondly, what do virus structures have in common? Virus Structure. All viruses contain the following two components: 1) a nucleic acid genome and 2) a protein capsid that covers the genome. Together this is called the nucleocapsid. In addition, many animal viruses contain a 3) lipid envelope.

Moreover, how do bacteriophages replicate?

Bacteriophages, also known as phages, are viruses that infect and replicate only in bacterial cells. During a lytic replication cycle, a phage attaches to a susceptible host bacterium, introduces its genome into the host cell cytoplasm, and utilizes the ribosomes of the host to manufacture its proteins.

How are animal viruses classified?

Virus classification is the process of naming viruses and placing them into a taxonomic system. Viruses are mainly classified by phenotypic characteristics, such as morphology, nucleic acid type, mode of replication, host organisms, and the type of disease they cause.

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How long does it take a virus to replicate?

Remarkably, viral incubation periods can vary from 1 or 2 days to years (Table; click to magnify). Short incubation times usually indicate that actions at the primary site of infection produce the characteristic symptoms of the disease.

Is a virus an animal?

Viruses. A virus is a microscopic organism that can replicate only inside the cells of a host organism. Viruses infect all types of organisms, including animals and plants, as well as bacteria and archaea.

What are some animal viruses?

Examples include, rabies, yellow fever and pappataci fever. The viruses that infect other vertebrates are related to those of humans and most families of viruses that cause human diseases are represented. They are important pathogens of livestock and cause diseases such as foot-and-mouth disease and bluetongue.

What are the stages of viral replication?

Viral replication involves six steps: attachment, penetration, uncoating, replication, assembly, and release. During attachment and penetration, the virus attaches itself to a host cell and injects its genetic material into it.

Do animal viruses replicate?


How do animal viruses infect cells? Animal viruses, like other viruses, depend on host cells to complete their life cycle. In order to reproduce, a virus must infect a host cell and reprogram it to make more virus particles.

What are the two ways viruses replicate?

There are two processes used by viruses to replicate: the lytic cycle and lysogenic cycle. Some viruses reproduce using both methods, while others only use the lytic cycle. In the lytic cycle, the virus attaches to the host cell and injects its DNA.

What is the first step in the life cycle of an animal virus?

The Lytic Cycle
Attachment is the first stage in the infection process in which the phage interacts with specific bacterial surface receptors (e.g., lipopolysaccharides and OmpC protein on host surfaces).

What are the consequences of a viral infection of an animal cell?

1. In lytic infection, the final result is the destruction of host animal cell and the release of progeny viruses. 2. In persistent infection, the release of virus particles, which takes place by a kind of budding process, may be slow and the host animal cell may not be destroyed.

Can bacteriophages kill viruses?

Bacteriophages (phages) are viruses of bacteria that can kill and lyse the bacteria they infect. After their discovery early in the 20th century, phages were widely used to treat various bacterial diseases in people and animals.

What is inside of a bacteriophage?


Bacteriophages are viruses that infect bacteria. T-phages have a head known as a capsid that contains double stranded DNA as their genetic material. The tail of the bacteriophage includes the tail sheath, base plate and tail fibers, which are made of different proteins.

Are phages alive?

Viruses and Bacteria
But bacteria, given the proper nutrients, can grow and reproduce on their own. Viruses cannot "live" or reproduce without getting inside some living cell, whether it's a plant, animal, or bacteria.

How many phages are there?

1031 bacteriophages

How do phages work?

Bacteriophages kill bacteria by making them burst or lyse. This happens when the virus binds to the bacteria. A virus infects the bacteria by injecting its genes (DNA or RNA). The phage virus copies itself (reproduces) inside the bacteria.

Are bacteriophages harmful to humans?

Bacteriophages are much more specific than antibiotics. They are typically harmless not only to the host organism but also to other beneficial bacteria, such as the gut flora, reducing the chances of opportunistic infections.

What are the two main structures of bacteriophage?


Characteristics of bacteriophages
The nucleic acid may be either DNA or RNA and may be double-stranded or single-stranded. There are three basic structural forms of phage: an icosahedral (20-sided) head with a tail, an icosahedral head without a tail, and a filamentous form.

Are bacteriophages good?

Bacteriophage means “eater of bacteria,” and these spidery-looking viruses may be the most abundant life-form on the planet. HIV, Hepatitis C, and Ebola have given viruses a bad name, but microscopic phages are the good guys of the virology world. Phage therapy has several advantages over antibiotics.

What are phages used for?

Bacteriophages or "phage" are viruses that invade bacterial cells and, in the case of lytic phages, disrupt bacterial metabolism and cause the bacterium to lyse [destruct]. Phage Therapy is the therapeutic use of lytic bacteriophages to treat pathogenic bacterial infections.