TLS Online TPP Program

#Question id: 4326


Which of the following is an example of post-transcriptional control of gene expression?

#SCPH05 I Biotechnology
  1. the addition of methyl groups to cytosine bases of DNA

  2. the binding of transcription factors to a promoter

  3. the removal of introns and alternative splicing of exons

  4. gene amplification contributing to cancer

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TLS Online TPP Program

#Question id: 8922

#SCPH28 | Zoology

Which statement is most consistent with the hypothesis that the Cambrian explosion was caused by the rise of predator-prey relationships?

TLS Online TPP Program

#Question id: 13035

#SCPH06 I Botany

Each band on the gel represents a different protein (or protein subunit); _____ proteins move through the gel more _____ than_____ proteins and therefore are found nearer the _____ of the gel.

TLS Online TPP Program

#Question id: 14330

#SCPH05 I Biotechnology

A radioactive isotope decays at a rate proportional to the amount of isotope present. If the concentration of isotope is C (mg l-I), its rate of decay is:

                                                                    

A solution of the isotope 32p is used to radioactively label DNA for hybridisation studies. The half-life of 32p is 14.3 days. According to institutional safety requirements, the solution cannot be discarded until the activity is 1% its present value. How long will this take?____________________

TLS Online TPP Program

#Question id: 5530

#SCPH06 I Botany

 The cavity inside the blastula is called the

TLS Online TPP Program

#Question id: 7011

#SCPH28 | Zoology

The vertebrate brain and spinal cord start their development as a flat plate of neuroepithelial cells that folds up along most of its length to form a tube. The process of forming this neural tube is called neurulation. Which of the following signals play important role in both neurulation and cell fate patterning of neural tube?