Table of Contents
- 1 What happens when a virus injects its DNA into a cell?
- 2 What does a virus inject into a cell that allows the virus to replicate itself?
- 3 How does a virus invade a cell?
- 4 Which component of a virus is injected into a cell?
- 5 What makes a copy of viral DNA?
- 6 What is a virus describe the basic structure of a virus?
- 7 How does a virus infect a host cell?
- 8 How do viruses build their capsid proteins?
What happens when a virus injects its DNA into a cell?
In the lytic cycle, the virus attaches to the host cell and injects its DNA. Using the host’s cellular metabolism, the viral DNA begins to replicate and form proteins. Then fully formed viruses assemble. These viruses break, or lyse, the cell and spread to other cells to continue the cycle.
What does a virus inject into a cell that allows the virus to replicate itself?
Spike proteins called, S proteins, recognize the ACE2 receptors of host cells allowing the virus to enter the host cell. Upon entry into the host cell, the virus hijacks the host and turns it into a factory producing many, many copies of SARS-CoV-2.
How are cells able to use the genetic material from viruses?
Certain viruses are often used as vectors because they can deliver the new gene by infecting the cell. The viruses are modified so they can’t cause disease when used in people. Some types of virus, such as retroviruses, integrate their genetic material (including the new gene) into a chromosome in the human cell.
Which of the following structures is used by some viruses to adhere to their host?
The outer structure surrounding the capsid of some viruses is called the viral envelope. All viruses use some sort of glycoprotein to attach to their host cells at molecules on the cell called viral receptors.
How does a virus invade a cell?
Viruses initially stick to cell membranes through interactions unrelated to fusion proteins. The virus surfs along the fluid surface of the cell and eventually the viral fusion proteins bind to receptor molecules on the cell membrane (4).
Which component of a virus is injected into a cell?
Viral penetration: The viral capsid or genome is injected into the host cell’s cytoplasm.
How does a virus infect a cell steps?
Step 1: Attachment: The virus attaches itself to the target cell. Step 2: Penetration: The virus is brought into the target cell. Step 3: Uncoating and Replication: The enveloped virus loses its envelope, and viral RNA is released into the nucleus, where it is replicated. Step 4: Assembly: Viral proteins are assembled.
How do viruses get into cells?
Virus entry into animal cells is initiated by attachment to receptors and is followed by important conformational changes of viral proteins, penetration through (non-enveloped viruses) or fusion with (enveloped viruses) cellular membranes. The process ends with transfer of viral genomes inside host cells.
During attachment and penetration, the virus attaches itself to a host cell and injects its genetic material into it. During uncoating, replication, and assembly, the viral DNA or RNA incorporates itself into the host cell’s genetic material and induces it to replicate the viral genome.
What is a virus describe the basic structure of a virus?
A complete virus particle, known as a virion, consists of nucleic acid surrounded by a protective coat of protein called a capsid. These are formed from identical protein subunits called capsomeres. Viruses can have a lipid “envelope” derived from the host cell membrane.
What happens to the virus after the DNA injects out of its capsid and into the host cell?
What happens to the host bacteria’s DNA after the bacteriophage injects its DNA RNA into the cell?
What happens to the host bacteria’s DNA after the bacteriophage injects its DNA/RNA into the cell? It puts the viruses DNA into the cells own DNA. The bacteria pass this “combined” DNA on to the daughter cells. The bacteria continue to reproduce and finally enter the lytic cycle when this happens.
How does a virus infect a host cell?
Viruses have structures that allow them to inject their genetic material directly into the DNA of the host cell. This strategy benefits the virus in that – a) the host cell is turned into a virus. b) mutations are introduced into the host cell. c) it is able to transform into a host cell.
How do viruses build their capsid proteins?
In addition to the gene coding for its capsid protein, every virus needs another gene for its own version of an enzyme known as a polymerase. Inside the cell, viral polymerases generate numerous copies of the invader’s genes, from whose instructions the cell’s obedient molecular assembly line produces capsid subunits and other viral proteins.
What is the function of viral polymerase inside the cell?
Inside the cell, viral polymerases generate numerous copies of the invader’s genes, from whose instructions the cell’s obedient molecular assembly line produces capsid subunits and other viral proteins.
Why is it important to administer antiviral agents within 48 hours?
An antiviral agent administered within 48 hours of the appearance of symptoms can reduce the severity of the illness. Why is it important to administer an antiviral agent to an infected person within 48 hours of the appearance of symptoms? (2015 STAAR, Q50) a) The H1N1 virus is dormant in cells.