February 9, 2017 7:36 PM 6) which toype of interactions generate the \"helis and

Question

February 9, 2017 7:36 PM 6) which toype of interactions generate the "helis and "sheer" secondary structures ofra peosein ? B) nompolar covalent bonds C) ionic bonds D) hydrogen bonds E) polar covalent bonds Which of the following statements in truc reganding te lusrted above? A) in a fat(lapid) C) I is a polysaccharide 8) Which term includes all others in thcu C) starch B) It is an amino acid carboydrate 9) which of the following statemets is true aboul butler sollum? A) They resist change in pH when baes an ded to henn bat not when acids are added to them B) They resist change in pli when acids ane added to there but not whon hascs are added to them C) They maintain a constant pH of eutly 7 in all livig cells and bislogical ud D) They resist change in pld when enther acids or are added to them E) Nose of the above 10. Which of the following solations hes the grestest concenteration of hydroxide ioOH A) lemon juice at ph 2 B) vinggar pH3 C) tomato juice at plt 4 D) urine at pll 6 onwater at pH 8 11). What prvestise to pobenmess of water molecules? A) hydrophobic interaction B) nompolar covalent bonds C) ionic bends hydrogen bonds both A and C

Explanation / Answer

1) Hydrogen bonds - The secondary structures of proteins, the alpha helix and the beta sheet interact with repeating peptide units by hydrogen bond donorand acceptor residues. Each residue has a carbonyl group that is a hydrogen- bond acceptor; nitrogen- hydrogen group, a hydrogen- bond donor.

2) It is a fat (lipid) - As shown in the image a fatty acid is a carboxylic acid with a long aliphatic chain. It consists of a hydrocarbon chain and a terminal carboxyl group. Polysaccharide consist of a number of sugar molecules bonded together. Since, the non-polar atoms present in the structure are more than the polar atoms, the molecule cannot be hydrophilic. Amino acids contains an amine (-NH2) and carboxyl (-COOH) functional groups, along with a side chain.

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