Ramachandran plots can help increase the accuracy of models derived from x-ray crystallography data. The plot below was created by measuring phi, and psi for each amino acid residue in a 2.2 A resolution crystal structure. In the plot, which excludes Gly and Pro residues, selected residues (dots) are numbered 1 through 5.

Which of the following statements can be correctly stated for this plot in reference to selected residues?

A. Residues 1 and 3 are in either B sheets

B. residue 2 is in a right-handed a helix, and residue 4 is in a left-handed a helix.

C. If residue 5 were Gly, it might be in an acceptable position in the plot

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#Question id: 308

#Unit 1. Molecules and their Interaction Relevant to Biology

The vapor pressure of o-nitrophenol at any given temperature is predicted to be______

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#Question id: 10422

#Unit 6. System Physiology – Plant

Arabidopsis contains five genes encoding phytochromes, PHYA–PHYE, four of the five phytochromes appear mostly light-stable in the plant and function primarily in the regulation of LFRs and of shade avoidance involving changes in the R:FR ratio.

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#Question id: 10947

#Unit 7. System Physiology – Animal

What occurs following activation of basophils?

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#Question id: 23303

#General Aptitude

When your friend invites you on feast then what do you in these conditions?

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#Question id: 11480

#Unit 7. System Physiology – Animal

Most of the chemosensory neurons arising in the nasal cavity have axonal projections that terminate in the ________.