In 1988, Richardson and Richardson observed that certain amino acid residues are statically favored as the amino-terminal caps for the alpha helices in 45 globular proteins. Which of the following statement stand correct with stability of helix?

A. The introduction of a negatively charged side chain at the N-cap, which can neutralize the partial dipole created by the unpaired amide protons, has been shown to increase stability

B. In particular, Gly is often observed at the both C-cap position and N-cap positions

C. In particular, Gly is often observed at the C-cap position only

D. In particular, Gly is often observed at the C-cap position, Asn at the N-cap position, Pro at the Ncap+1 and Asp and Glu at N2 and N3

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#Question id: 9214

#Unit 9. Diversity of Life Forms

Researchers have been studying a rare population of 87 voles in an isolated area. Ten voles from a larger population were added to this isolated population. Besides having ten additional animals, what benefits are there to importing individuals?

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#Question id: 11290

#Unit 10. Ecological Principles

Which of the following statement are incorrect?

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#Question id: 11707

#Unit 7. System Physiology – Animal

A human who has no access to fresh water but is forced to drink seawater instead will ________.

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#Question id: 12742

#Unit 13. Methods in Biology

What will happen if too much antigen is present in the Agglutination process?

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#Question id: 16477

#Unit 12. Applied Biology

Individual cell lineages are first isolated from an organ they are then grown separately to high density in a three- dimensional matrix. This  type of culture is called