Tat and Rev proteins are required for HIV replication. What are their roles and why are they essential to the virus?

Q: The FDA finds that chickens across the US are infected with a new type of bird-flu. They determine…

A: A gene is a DNA-based functional heredity unit that delivers instructions for the production of RNA…

Q: Explain why the following statement is true: RNA polymerase copies template DNA in the 3’ to 5’…

A: The DNA helix is unwound right before the active site for polymerization by the RNA polymerase,…

Q: The FDA finds that chickens across the US are infected with a new type of bird-flu. They determine…

A: Codon is a sequence of three nucleotides that together form unit of genetic code in a DNA or RNA…

Q: RNA polymerases

A: RNA polymerase:It is an important enzyme involved in transcription of DNA to RNA, gene expression.It…

Q: What is the concept behind RNAI? Explain in terms of how it works.

A: A "nucleic acid" is a linear polymer of nucleotides that is a component of the cell's information…

Q: Each type of molecule listed below is recognized by a specific class of nuclear import receptor…

A: Importin and exportin refer to the nuclear transport receptors that are responsible for the…

Q: The beginning of the hexose kinase gene's sequence can be found below, the +1 nucleotide is…

A: Information of any DNA molecule is present in its sequence of bases on two strands. When cell…

Q: List the ways by which viruses overcome lack of 5' cap in their mRNA

A: Viruses are simple, noncellular entities consisting of one or more molecules of either DNA or RNA…

Q: Explain how oseltamivir (Tamiflu) interferes with influenza virus replication.

A: The influenza virus is commonly known as the flu virus. An individual suffering from flu may…

Q: Replication of both strands of DNA in adenoviruses occurs ina continuous (leading) fashion. How can…

A: Adenovirus is the most common virus which causes common cold and flu. Adenovirus has a broad range…

Q: RNA polymerase from E. coli (core enzyme alone) has all of the following properties except:…

A: RNA polymerase enzyme is a multi subunit enzyme having a catalytically active core.

Q: Briefly explain how a lambda lysogen can provide immunity against infection by another phage with…

A: We know that immunity is the ability of an organism to resist infections by pathogens or a state of…

Viral Replication

The virus is acellular and considered non-living outside the host cell. The replication of the virus occurs only inside the living cells. Only a few genes are present in the smallest virus, whereas many genes are present in the largest virus. These genes encode specific viral proteins.