B: Mutated DNA sequences, which can pair with existing genes, are introduced.
C: The DNA sequences of the entire genomes of disease-causing microbes are compared.
D: A new gene, which codes for the protein that can repair defective genes, is introduced.
D: A new gene, which codes for the protein that can repair defective genes, is introduced.
The structure of virus consists of viral genome, nucleocapsid, tegument, envelope, and envelope protein. The genome is present in the Nucleocapsid.
The simplest of viruses are composed of genetic material and protein or capsid. Viruses do not produce many structural elements however some viruses may have an additional proteinaceous structure around the genetic material called nucleocapsid and a lipid bilayer covering the outer capsid layer called the envelope. The capsid is there to protect the genetic material from degradation. The viral envelope is derived from the host cell membrane and the virus encoded proteins. The sugar moieties attached to those proteins and this feature influences and contributes to the host specificity, host-parasite interaction etc.
The nucleocapsid protein is encoded by the gag gene in HIV virus and in coronavirus, it is the one present in greatest abundance and highly antigenic.
The virus structure varies among the different families and at the least has a capsid and in some there might be a nucleocapsid additionally covering the genetic material of the virus. It is either a capsid or the nucleocapsid and capsid that covers the genetic material.
The viral genetic material is covered by capsid and nucleocapsid.
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According to the CDC, tooth decayaffects more than one-fourth of U.S. children aged 2 to 5.Tooth decay is thedamage of the structure of the tooth which is caused by acids that are producedwhen sugar is being broken down by plaque bacteria in the mouth. Tooth decay is the primary cause of tooth loss in children in the UnitedStates.
The statement which best describes cancer cells is that: D. They are not regulated by contact inhibition.
Cancer can be defined as the uncontrolled division of certain bodycells, which then invade the surrounding tissues of the body and interfere with the body's normal function.
Basically, cancer cells are caused when various body cells grow and divide more than they are required or they fail to when necessary (required).
Generally, some examples of cancer are:
The growth and division of body cells is controlled by cyclin-dependent protein kinases (Cdks) and regulated by subunits called cyclins during contact inhibition.
In conclusion, cancer cells are caused when body cells are not regulated by contact inhibition, which may be due to exposure to extremely dangerous radioactive substances such as gamma ray, uranium etc.
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