181 Lec - PPT2

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Questions and Answers

Which computational models are required to determine the steric and electronic properties of a molecule?

  • Quantum mechanics
  • Molecular simulation
  • Both quantum mechanics and molecular simulation (correct)
  • Neither quantum mechanics nor molecular simulation

What is the purpose of the CSD and PDB databases in the field of molecular structures?

  • To store experimental data only
  • To determine bond lengths and conformations of specific molecular fragments
  • To derive 3D pharmacophores
  • To provide knowledge and rules about conformational properties and intermolecular interactions (correct)

What is the main purpose of the PDB database?

  • To store x-ray structures of organic and organometallic compounds
  • To determine bond lengths and conformations of specific molecular fragments
  • To provide information about intermolecular interactions
  • To form the basis of comparative modeling (correct)

Which type of functional group is more likely to act as an acceptor in intermolecular interactions?

<p>Ester groups (C)</p>
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What is the purpose of 3D pharmacophore searching?

<p>To identify compounds with 3D properties (B)</p>
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What is the purpose of pharmacophore features in drug design?

<p>To specify the spatial relationships between features (B)</p>
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What is the purpose of rapid screening in 3D database searching?

<p>To eliminate molecules that do not match the query (C)</p>
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Which method uses a pre-calculated set of low-energy conformations obtained using poling?

<p>Maximum Likelihood Method (D)</p>
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What is a clique in graph theory?

<p>A completely connected subgraph in a graph (A)</p>
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Which method generates a series of low-energy conformations for each molecule?

<p>DISCO program (D)</p>
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What is the scoring function used in the Maximum Likelihood Method for pharmacophore mapping?

<p>$M summation till K+1$ (D)</p>
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Which of the following is true about the fitness function in the GASP algorithm?

<p>It ranks different members of the population (D)</p>
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What is the chromosome structure in the GASP algorithm?

<p>2N - 1 bitstrings (A)</p>
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How are new members of the population generated in the GASP algorithm?

<p>Crossover and mutation (B)</p>
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What is the role of the genetic operators in the GASP algorithm?

<p>To generate new members of the population (B)</p>
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Which method involves generating conformations by systematically assigning values to torsion angles?

<p>Grid search (B)</p>
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Which method involves randomly modifying a previously generated structure and then minimizing it?

<p>Random conformational search (B)</p>
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What is the criterion used in the Metropolis Monte Carlo scheme for selecting a new structure?

<p>The Boltzmann factor must be larger than a random number (D)</p>
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Which process involves deriving a 3D pharmacophore by identifying the pharmacophoric groups in each molecule that will be overlaid in the final pharmacophore?

<p>Pharmacophore mapping using constrained systematic search (D)</p>
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Which method solves Newton's equations of motion for the atoms in a system to give a trajectory that defines how the positions of the atoms vary with time?

<p>Molecular dynamics (A)</p>
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Which enzyme in Mycobacterium tuberculosis was chosen as the drug target for computer-aided drug discovery and development approaches?

<p>BioA aminotransferase (A)</p>
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What is the objective of deriving a 3D pharmacophore in drug discovery?

<p>To identify the 3D pharmacophore that contains the largest number of features common to all of the active molecules (D)</p>
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