Practice Questions

TLS Online TPP Program

#Question id: 760

Which force can stabilize a DNA double-helix?

#Unit 1. Molecules and their Interaction Relevant to Biology

Hydrophobic bases are found in the interior of the helix where each base pair is stabilized by the same number of hydrogen bonds.
Hydrophilic sugar-phosphate groups are found on the exterior of the helix where they can interact with water.
Non-covalent N-glycosidic bonds can form between nitrogenous bases in opposite strands in the helix.
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: 31303

#Unit 5. Developmental Biology

In birds, primitive groove is homologous to the:

TLS Online TPP Program

#Question id: 31304

#Unit 5. Developmental Biology

Hensen’s node is functionally equivalent to the which of the following structure of amphibian?

TLS Online TPP Program

#Question id: 31305

#Unit 7. System Physiology – Animal

What is the membrane potential (threshold level) at which the S-A node discharges?

TLS Online TPP Program

#Question id: 31306

#Unit 2. Cellular Organization

Which of the following technique is used to identify enhancer and topological domains binding regions in DNA

TLS Online TPP Program

#Question id: 31307

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is most disordered region shown in given PONDR Plot

TLS Online TPP Program

#Question id: 31308

#Unit 3. Fundamental Processes

Which position of cytosine gets protonated at pH 3?