(a) A retrovirus inserts its RNA into the cel: the wiral RNA undergoes Viral RNA reverse transcription and inserts into the host chromosome nest to a protooncogene. Reverse transcription Host chromosome Provirus Proto oncogene Viral reproduction When the virus reproduces, the proto-oncogene is incorporated into the virus In repeated rounds of viral infection and Repeated rounds of infection and reproduction, the proto-oncogene becomes rearranged or mutated or both. reproduction Viral RNA Reverse transcription producing an oncogene that inserted back into the hast chromosome. Host chromosome Mutation Provirus Oncogene (b) A retrovirus infects a cell... 2.and the provirus 3 The strong viral promoter stimulates over- expression of the inserts near a proto-oncogene. proto-oncogene. Strong viral promoter Provirus / Proto-oncogene Over- expression MRNA 23.14 Retroviruses can cause cancer by (a) mutating or rearranging proto- oncogenes or (b) inserting strong promoters near proto-oncogenes.

Q: 12445 RD-Hom 4(167-277) A(194-277) A(97-138) A(97-167) 6 A(97-194) N595A 7890 A(619-723) HD 10…

A: A regulatory protein regulates the expression of a gene by binding with that gene through its DNA…

Q: Why is step 2 correct, is it because this is a repressible operon?

A: Operon is a cluster of genes which contains operator, promoter and structural genes. It is a kind of…

Q: Is the Degradation of Xrn1 in poliovirus-infected cells an example of virus-encoded molecules…

A: No, this mechanism is a common theme in viral infection, including poliovirus infection. This is…

Q: My Avya mouse is brownish because a) the CpG island with the transposon is unmethylated. b) it was…

A: Epigenetic systems that facilitate gene-environment interactions are involved in the ability of…

Q: seems that the expert only addressed the background of prorooncogen and the impact of Ras causing…

A: Protooncogenes are the genes that form the proteins that are responsible for cell division and cell…

Q: Suppose you had a bacteriophage λ in which the gene encoding the cro protein had been mutated, so…

A: The mutation alters allele frequencies by constantly introducing new alleles, which can be…

Q: In immediate-early transcription of the phage genome, the N protein works as an antiterminator to…

A: Lambda phage is a bacteriophage which can enter either the lytic or lysogenic cycle. The…

Q: Which of the following statements is not true of both the LacI and TrpR repressor proteins?a) an…

A: The objective of the question is to identify the statement that is not true for both LacI and TrpR…

Q: The cI protein in bacteriophage l (lambda) is a transcriptional regulator - name the promoters in…

A: cI is a transcription inhibitor of bacteriophage Lambda. It is also known as Lambda Repressor and is…

Q: What type of control generally involves binding of a repressor protein to a regulatory DNA sequence?…

A: Repressor : DNA binding protein which inhibits the expression of 1 or more genes via the binding to…

Q: According to the operon model, for the synthesis of an inducible enzyme to occur, the end-product…

A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…

Q: hich operons would be functional under these conditions?   What repressors would be made? (NOTE:…

A: Operon is a regulatory unit consisting of cluster of genes containing operator promoter and…

Q: The protein NK2 is a transcriptional regulator that functions both as a repressor and activator. To…

A: A regulatory protein regulates the expression of a gene by binding with that gene through its DNA…

Q: Viruses encode many ways to antagonize the Pkr pathway. Which is not a direct target of viral Pkr…

A: The question is asking us to identify which among the given options is not a direct target of viral…

Q: Figure 14.23 shows a genetic switch that controls the choice between the lytic and lysogenic cycles…

A: The cellular activities are controlled by its internal habitat. The adaptation of cells to…

Q: The regulation of the trp operon genes by the Trp repressor protein is an example of ______ gene…

A: The regulation of the trp operon genes by the Trp repressor protein is an example of  negative gene…

Q: At 2:00 pm, you measured intracellular arginine at 100M. After addition of 200M of arginine to the…

A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…

Q: Complete the table below by choosing a term(s) in Column B that associates with the term in Column…

A: The repressor, LacI, binds to the operator sequence and prevents transcription of those genes unless…

Q: Which of the following accurately describes the function of HOTAIR? O It is a long non-coding RNA…

A: Option 1 is the correct answer.

Q: inducible operon

A: Transcription: The process of copying of a segment of DNA into RNA is known as Transcription. The…

Q: You are growing E. coli in a laboratory in order to study their operons. The growth media you are…

A: According to our guideline we can answer only the first question up to first three subparts. So,…

Q: The lac operon has which of the following characteristics? O 1) usually requires an activator…

A: In Eukaryotes all genes are separate and produce individual mRNAs on transcription. However, in…

Q: Which protein product of HTLV-1 functions as a transcriptional activator and is also considered to…

A: HTLV-1 is an enveloped virus that contains two strands of RNA within a protein capsid. It can infect…

Q: 7. If a researcher moves the promoter for the lac operon to the region between the beta…

A: Lac operon is a bacterial gene and it works through a repression mechanism. lac I produces repressor…

Q: How does tryptophan affect the function of trp repressor?

A: Regulation of gene expression is the mechanism of switching off and switching on the genes according…

Q: You have E. coli growing in HIGH lactose and HIGH glucose. You measure the amounts of protein and…

A: The E.coli is growing in a medium rich in lactose and Glucose both. There are two regulatory…