Which of the following is true about RNA gene silencing? It say decrease transla

Question

Which of the following is true about RNA gene silencing? It say decrease translation The RNA's are short. It may result in degradation of RNA. All the above are true. Which of the following can cause cancer? Normal apoptosis. Decreased mutation rate. Underproduction of cyclins. Incorrect regulation of transcription factor activity. In NORMAL cells, the ras gene family protein: control cell division in response to growth factors are active at all times are cyclin-dependent kinases are transcription factors Proper control of the cell cycle involves: cyclins cyclin dependent kinases both of the above The retinoblastoma protein: causes an increased mutation rate regulates transcription factors in NORMAL cells, is equally active throughtout the cell cycle is the same as p53 Which of the following is true? Only one mutation is usually necessary to transform a normal cell into a malignant cell. The incidence of cancer is greater in younger individuals. The probability of a person developing cancer in their lifetime is 25% or more Tobaco smoke does NOT cause cancer. Histone deacetylases (HDACs): can be recruited to genes by activators remove acetate groups from histone tails increase transcription all the above Which of the following is true about PCR? One incubation is performed above 90 C. Taq DNA polymerase is used. Primers are used. all the above

Explanation / Answer

22) RNA silencing is the gene silencing effects which use 21- to 25-nucleotide RNAs to repress the expression of specific target genes. RNA silencing is also called as RNA interference. It produces negative regulation of gene expression with the help of microRNAs (miRNA) and small interfering RNA (siRNA).

MicroRNA (miRNA) and small interfering RNA (siRNA) induce degradation of mRNA thereby inhibiting translation and gene expression. Sometimes,RNA silencing may also be induced by double stranded RNA (dsRNA).

So, the answer for this question is option (d) All the above are true

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