Some of these are wrong but I do not know which. We\'ve talked a lot about hydro

Question

Some of these are wrong but I do not know which.

We've talked a lot about hydrogen interactions ('hydrogen bonds' to the unwary). They're critical in many aspects of biology. Take a look at the amino acid sidechains and identify the true remarks below. Fact two forms of histidine are shown (influenced by environment). Question: the nitrogen circled is a potential H bond donor on the right; acceptor on the left the six hydrogens in phenylalanine that are not shown (see Lab Manual p. 0-5 for conventions) could all be 'donated' coming out of the 'ring' in tyrosine is an -OH; the oxygen could be an acceptor and the hydrogen a donor isoleucine has many donatable hydrogens glutamine has both a hydrogen interaction donor and an acceptor in its sidechain glycine is probably an excellent H-bond donor because its sidechain IS hydrogen

Explanation / Answer

True. The N-H on the right is a potential Hydrogen bond donor and N on the left acceptor False: Phenylalanine is hydrophobic True; the oxygen bonded to H in OH is highly electronegative atom hence creates an electropositive charge on H, hence accepts a H bond. False: Isoleucine is hydrophobic Tue False: Glycine is cannot donate H

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