Practice Questions

TLS Online TPP Program

#Question id: 739

What is true about the rotation about bonds in a protein backbone?

#Unit 1. Molecules and their Interaction Relevant to Biology

The rotation is free about all bonds in the backbone, except for the bond between the nitrogen and the alpha carbon in proline residues.
The bond between the carbonyl carbon and nitrogen is restricted. Other bonds are free to rotate depending only on steric hindrance or the presence of proline residues.
All bonds in the backbone have restricted rotation and partial double-bond character.
The rotation is free only about the peptide bond. The other bonds are restricted by steric hindrance and the presence of proline residues.

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TLS Online TPP Program

#Question id: 27948

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following are the priming reactions of the glycolysis

a. Fructose 6-phosphate → 1,6-bisphosphate

b. Glucose → Glucose 6-phosphate

c. Glucose 6-phosphate → Fructose 6-phosphate

d Glyceraldehyde 3-phosphate → 1,3-Bisphosphoglycerate

TLS Online TPP Program

#Question id: 18228

#Unit 8. Inheritance Biology

You are conducting genetic linkage studies of an autosomal dominant disease. You are focused on two SSR markers that may be linked to each other and to the disease. Here is a family in which some individuals are affected:

Calculate LOD scores for linkage at θ = 0.1 between the disease and SSR93?

TLS Online TPP Program

#Question id: 28527

#Unit 5. Developmental Biology

Which of the following gene encodes an acetyl-CoA carboxylase which crucial for proper patterning of the apical portion of the embryo?

TLS Online TPP Program

#Question id: 18924

#Unit 13. Methods in Biology

Function of PAR gene is

TLS Online TPP Program

#Question id: 15304

#Unit 4. Cell Communication and Cell Signaling

An activating mutation of one of the two alleles of a proto-oncogene converts it into an oncogene, This can occur by EXCEPT