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They form the capsid that encloses the genetic material and retroviruses contain the protein enzyme reverse transcriptase. Also the proteins, especial glycoproteins, are the key that enters the lock of a cells protein markers.
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Molecules consisting of DNA plus proteins?
A virus is such a molecule. Histones
What compound is important in cell repair?
protein
Can a virus can only reproduce by controlling a cell?
Yes, that's the ony way
True of false when a virus is active the cell makes the virus's proteins and genetic material and new viruses are made?
The components of the new virus actually assemble them selves through a complex process called "Self Assembly"
How does a virus take over a cell?
They are like cockle burrs that "grab" hold of your clothing or a dog's coat. They are hijackers. Once they get attached, by attaching to matching docking proteins of a living cell, they can take it over and "make" the living cell produce virus particles instead of cell parts. These particles can assemble into more viruses and then they break out of the cell (killing it) and begin the process again.
Why is protein synthesis important for cells and viruses?
Protein synthesis is important for viruses because the virus forces the host cell to make proteins that the cell does not need, but the virus does to repoduce. Protein synthesis is important for cells because the proteins are essential for all cellular activites.
What parts of a virus allow it to attach to a cell?
The proteins in the capsid allow the virus to attach to the "docking stations" proteins of the host cell.
What part of virus allows it to attach to a cell?
The proteins in the capsid allow the virus to attach to the "docking stations" proteins of the host cell.
Proteins on the outside of the aids virus bind to what?
proteins on the surface of red blood cells
How does a host living cell face with an enemy virus?
A virus and a cell have to have matching "docking" proteins for the virus to invade. Otherwise the virus is blocked.
Where does an enveloped virus synthesize its proteins?
Viral proteins are synthesized in the cytoplasm using the host's enzymes.
What is antigenic drift?
The genome of viruses can mutate over time through a variety of mechanisms. Some viruses are more prone to these mutations than others. When the genome changes, this changes the proteins that are expressed by the virus, included the proteins that are present on the surface of the virus. These proteins are the antigens that are recognised by the host immune system and which trigger the immune response. Antigenic drift is when the genome of the virus mutates thus changing the antigens expressed by the virus. This means that an individual immunized against a virus may not be protected if the virus undergoes antigenic drift as the proteins present of the surface of the virus are not the same as the virus against which the individual was immunized.
What is the purpose of proteins on outer coat of a virus?
To match and dock with proteins on the outside of cells they are going to enter.
What can you conclude about the surface proteins of viruses for which effective vaccines exist?
In order to neutralize the virus, the proteins fro the surface of the virus is used. There are more than a single surface glycoprotein in a single virus and the best antigen must be chosen.
Why do proteins establish the host range of a virus?
It all depends on what you mean by your question. Both the host cell and the virus have proteins that must match for the virus to enter the cell. The more these match, the greater number of species of plants and animals that will be affected.
What are the spikes and there function in a virus?
Spikes are proteins that are part of the viral capsid/envelope (depending on if the virus is a naked virus or not). It helps with attachment to the host cell. They are derived from their host cell's own proteins (but are not the same as their hosts), and can help in evading the host cell's defenses.
Why can a virus enter some types of human cells and not others?
Some viruses are very specific to certain cells. The cell has proteins on it's surface and a virus will use it a docking station to be able to enter the cell. Some cells don't have that protein and the virus can not enter the cell.
