TLS Online TPP Program

#Question id: 4315


A researcher introduces double-stranded RNA into a culture of mammalian cells and can identify its location or that of its smaller subsections experimentally, using a fluorescent probe. When she finds that the introduced strand separates into single-stranded RNAs, what other evidence of this single-stranded RNA piece's activity would she find?

#SCPH05 I Biotechnology
  1. She can measure the degradation rate of the remaining single strand.

  2. The rate of accumulation of the polypeptide encoded by the target mRNA is reduced.

  3. The amount of miRNA is multiplied by its replication.

  4. The cell's translation ability is entirely shut down.

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TLS Online TPP Program

#Question id: 5268

#SCPH05 I Biotechnology

Competent cells

TLS Online TPP Program

#Question id: 11655

#SCPH06 I Botany

succession as proceeding to a distinct end point, each phase of succession shown in given diagram (A → D)

TLS Online TPP Program

#Question id: 7766

#I Life Science/ Life Sciences Group – I-V

The relationship between shortened telomeres and stem cell depletion has been seen in degenerative diseases such as mouse muscular dystrophy,

I) When____ is activated by damaged telomeres, DNA replication halts, and if the repair doesn’t work, apoptosis is initiated. If the cell is a stem cell or some other rapidly replicating cell, this will reduce the numbers of cells produced, and the lack of stem cells will produce an “aged” phenotype.

 II) When ____ is activated by damaged telomeres, DNA replication halts, repair do its work, apoptosis is inhibited. If the cell is a stem cell or some other rapidly replicating cell, this will increase the numbers of cells produced, and then these cells will produce an “aged” phenotype.

 Choose correct gene name with right statement

TLS Online TPP Program

#Question id: 119

#SCPH05 I Biotechnology

Tay-Sachs disease is the result of a genetic defect in the metabolism of:

TLS Online TPP Program

#Question id: 13104

#SCPH06 I Botany

With the help of DNA fingerprinting which can be used to determine paternity. There are three babies (Baby A, Baby B and Baby C) in a maternity ward, and three sets of confused and worried parents. (Father and Mother #1 are a couple, as are Father and Mother #2, and Father and Mother #3.) 
You do each PCR reaction and load each one into a separate well of an agarose gel, and then run the gel.
 

 
Why is it that some people show two bands?