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TLS Online TPP Program

#Question id: 4949

What probably accounts for the switch to DNA-based genetic systems during the evolution of life on Earth?

#XL - S Microbiology

  1. DNA is chemically more stable and replicates with fewer errors (mutations) than RNA.

  2. Only DNA can replicate during cell division.

  3. RNA is too involved with translation of proteins and cannot provide multiple functions.

  4. DNA forms the rod-shaped chromosomes necessary for cell division.

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TLS Online TPP Program

#Question id: 20156

#XL - P Chemistry

At 200°C hydrogen molecules have velocity 105 cm sec–1. The de-Broglie wavelength in this case is approximately
TLS Online TPP Program

#Question id: 27352

#XL - T Zoology

Scientists have adapted CRISPR to turn it into a biotechnology tool for _ DNA.
TLS Online TPP Program

#Question id: 20154

#XL - P Chemistry

If r is the radius of first orbit, the radius of nth orbit of the H atom will be
TLS Online TPP Program

#Question id: 18078

#XL - R Botany

Which of the following can be found in gymnosperms? 
TLS Online TPP Program

#Question id: 8721

#XL - T Zoology

Based on cladistics, which eukaryotic kingdom is polyphyletic and, therefore, unacceptable?