Answer Posted / baljinder gill

Atoms were treated as hard spheres and dihedral (φ and ψ) angles which cause spheres to collide correspond to sterically disallowed conformations (atoms come closer than sum of van der Waals radii) sterically allowed conformations of the polypeptide backbone (energetic stabilized).
Used computer models of small polypeptides to systematically vary φ and ψ with the objective of finding stable conformations. Ramachandran plot tells about the permitted (allowed)and disallowed rotation of dihedral angles and gives information about the stabilized structure or allowed structure of proteins (why alpha helix is more stable than beta sheet).

How much amount of energy is required to break the triple bond in nitrogen molecule?

1144

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Why nitrogen cannot form penta halides?

1255

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Because of dna replication, two dna molecules come to existence. Why is not it correct to assert that two “new” dna molecules are created? What is the name given to the process concerning that fact?

1262

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Which univalent element cannot form alums and why?

1185

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Explain what are similarities and differences between the transcription process and the replication processes?

1252

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Define bond angle?

1224

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For what purpose ammonal is used?

1173

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Why are right-handed helices more stable than left-handed helices?

2633

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Why does the pH of the blood decrease in a person who has digested trematol?

2628

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Covalent bond is directional therefore which covalent property is shown?

1115

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Explain what are the raw materials used for the precipitation of na2co3 by solvay ammonium process?

1127

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What are nucleic acids? What is the historic origin of this name?

1176

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Where do hydrophobic and hydrophilic residues usually end up after protein folding?

2295

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Explain who proposed law of mass action? What does it states?

1250

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Which compound is involved in reducing levels of homocysteine in the blood?

2637

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