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TLS Online TPP Program

#Question id: 27364

Which statement best describes the distinction between the purposes of the two RNAi pathways within the eukaryotic cell?

#Section 3: Genetics, Cellular and Molecular Biology
  1. miRNA-mediated gene silencing represents a back-up pathway should siRNA-mediated gene silencing be unsuccessful at silencing the target dsRNA

  2. siRNA and miRNA-mediated gene silencing pathways must both be active to successfully silence the target dsRNA

  3. miRNA and siRNA-mediated gene silencing represent evolutionary-independent pathways which confer identical silencing mechanisms on the target dsRNA

  4. siRNA-mediated gene silencing represents a cell defence mechanism against exogenous dsRNA; miRNA-mediated gene silencing is an integral gene expression regulation process

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TLS Online TPP Program

#Question id: 14490

#Section 1: Engineering Mathematics

In a single throw of two dice find the probability that neither a doublet (same number on the both dice) nor a total of 9 will appear.
TLS Online TPP Program

#Question id: 13097

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

You are a scientist who is using genomics to currently study a new bacterial species that no one has ever studied before. The following sequence is a piece of DNA within the coding region of a gene that you have recently sequenced.
 
If you take any bacterial gene sequence, before you begin doing any sequence analysis on it, there are six potential open reading frames. Why are there six?
TLS Online TPP Program

#Question id: 15556

#Section 1: Engineering Mathematics

The value of the determinant

  
TLS Online TPP Program

#Question id: 351

#Section 4: Fundamentals of Biological Engineering

 If the cytoplasm of a cell is at pH 7, and the mitochondrial matrix is at pH 8, then the concentration of H+ ions ________.
TLS Online TPP Program

#Question id: 4157

#Section 3: Genetics, Cellular and Molecular Biology

At the ribosome, the codon and anticodon associate by __.