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TLS Online TPP Program

#Question id: 2919

Topoisomerases play the essential role of unlinking the DNA molecules to allow them to separate into the two daughter cells for cell division. Which of the following statements regarding the mechanism of topoisomerases is INCORRECT?

#Unit 2. Cellular Organization

  1. Melting of the DNA strands is favored in highly negatively supercoiled DNA making this DNA an excellent substrate for relaxation.

  2. This product DNA is identical to the starting DNA molecule, except that the linking number has been increased by 1.

  3. Topoisomerase function requires that DNA cleavage, strand passage, and DNA rejoining all occur in a highly coordinated manner.

  4. The OH group from one broken DNA end attacks the phospho-tyrosine bond re-forming the DNA phosphodiester bond via ATP hydrolysis.

More Questions
TLS Online TPP Program

#Question id: 27382

#Unit 1. Molecules and their Interaction Relevant to Biology

Calculate the effective nuclear charge (Zeff) experienced by the 2s electrons of the Sulfur atom (S).
TLS Online TPP Program

#Question id: 28051

#Unit 1. Molecules and their Interaction Relevant to Biology

What is the most probable fate of misfolded proteins when attempts to refold it fail? 
TLS Online TPP Program

#Question id: 6538

#General Aptitude

Find the missing word : A, AB, ...... , ABBABAAB
TLS Online TPP Program

#Question id: 7473

#General Aptitude

At what time between 6 to 7 o’ clock minute and hour hand will Coincide ?
TLS Online TPP Program

#Question id: 26467

#Unit 3. Fundamental Processes

Which of the following protein reduces the lifetimes of the rrn open promoters to a level at which they are responsive to changes in iNTP and ppGpp concentrations