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TLS Online TPP Program

#Question id: 27248

Which of the following forces can stabilize a normal DNA double-helix?

#Section 3: Genetics, Cellular and Molecular Biology
  1. Base-stacking is a non-covalent interaction that occurs between the relatively hydrophobic bases in the interior of the helix.
  2. Base-pairing is a non-covalent interaction that occurs between adjacent bases in the same strand of the DNA molecule.
  3. The hydrophilic sugar-phosphate groups are on the exterior of the helix where they can interact with each other.
  4. The deoxyribose rings form N-glycosidic bonds with the phosphate groups that link neighboring nucleotides.
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TLS Online TPP Program

#Question id: 4151

#Section 3: Genetics, Cellular and Molecular Biology

The signal sequences that direct proteins to the nucleus are:
TLS Online TPP Program

#Question id: 15470

#Section 4: Fundamentals of Biological Engineering

In the stoichiometric equation given below identify which one of the following corresponds to oxygen balance:
CwHxOyNz + aO2 + bHgOhNi cCHαOβNδ + dCO2 + eH2O
TLS Online TPP Program

#Question id: 2452

#Section 3: Genetics, Cellular and Molecular Biology

Intermediate filaments

a. are typically 6 nm in diameter.                  

b. are essential for cell motility.

c. may be used to diagnose the tissue of origin for many cancers.

d. are composed of globular subunits.                       

e. are formed from tetrameric subunits.
TLS Online TPP Program

#Question id: 1543

#Section 3: Genetics, Cellular and Molecular Biology

Effector  cytokines of TH 1 cells?
TLS Online TPP Program

#Question id: 15583

#Section 4: Fundamentals of Biological Engineering

The dissolved oxygen concentration during the measurement of KLa by sodium sulphite method is