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TLS Online TPP Program

#Question id: 341

 Which force can stabilize a DNA double-helix?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. Hydrophobic bases are found in the interior of the helix where each base-pair is stabilized by the same number of hydrogen bonds.

  2. Hydrophilic sugar-phosphate groups are found on the exterior of the helix where they can interact with water.

  3. Non-covalent N-glycosidic bonds can form between nitrogenous bases in opposite strands in the helix.

  4. Covalent base-stacking interactions can occur between adjacent bases within the same strand in the helix.

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TLS Online TPP Program

#Question id: 1345

#Unit 4. Cell Communication and Cell Signaling

Embryos injected with antibodies to fibronectin show inhibited movement of neural crest cells during development of the nervous system. These experiments show that:
TLS Online TPP Program

#Question id: 15891

#Unit 12. Applied Biology

The following are the plant material used for tissue culture except;
TLS Online TPP Program

#Question id: 30053

#Unit 7. System Physiology – Animal

The second heart sound is produced by:
TLS Online TPP Program

#Question id: 313

#Unit 1. Molecules and their Interaction Relevant to Biology

What is the difference between a particle being hydrated versus being solvated?
TLS Online TPP Program

#Question id: 24582

#Unit 3. Fundamental Processes

If the mismatch is near 3’ then which of the following will degrade strands of DNA in the 5’ → 3’ direction only