The hydrophobic effect explains why: O Water regulates pH in the interstitial fluid between eukaryotic cells. Salt bridges form between oppositely charged histones and DNA in an aqueous environment. Nitrogenous bases are in the interior of the helix, when DNA is in an aqueous environment. O Oil forms a homogenous mixture with polar solvents, like acetone.

Rank from left to right the compound with the most reactive chemical linkage: peptide bond, ester, ether, acid anhydride, aminoacyl-TRNA How many bacterial translation factors are "G" proteins? How many proteins are involved in the nucleotide-dependent steps of protein synthesis?

Double stranded nucleic acids are stabilized by all of the following except: A. Hydrophobic stacking between bases B. Hydrogen bonding between pyrimidines and purines C. Repulsion of phosphate groups D. Phosphodiester backbones E. Hydrogen bonding via ether linkages

What general structural feature is shared by proteins that specifically form homodimers (but not homotrimers, homoteramers etc)? Only one answer is correct.     the surface consists of hydrophilic alpha-helix.   the surface is highly modified by post-translational modification.   the surface is permanently bound by chaperones.   the surface is unstructured.   the surface, or part of it, is self-complementary.

Given the following diagram of how protein AWESOME1 binds to it's target DNA, describe the potential effects of each of the 5 mutations shown below. The wild-type sequence of a helix #1 is also shown in the blue box, and all the mutations are in helix #1 (see numbers for identifying particular residues). a helix #1 R(1)-V-I-L-Y-F-W-I-M-Y-F-S-H-Y-W-R(16) #1 Predict the consequence of the following mutations: 1) Arg(1) to Glu 2) Arg(1) to Ala 3) Phe(6) to lle 4) Trp(7) to Phe 5) Met(9) to Pro in

The human anti-bacterial protein lysozyme, consisting of a single polypeptide with 129 amino acids, contains how many peptide bonds? 131 peptide bonds 130 peptide bonds 129 peptide bonds 128 peptide bonds 127 peptide bonds

Which amino acid sequence will form part of which protein structure, and why?   Sequence 1: Ser-Phe-Gln-Val-Lys-Leu-His-Tyr-Asp-Val   Sequence 2: Glu-Tyr-Leu-Asn-Phe-Ala-Gln-Val-Leu-Arg    __Amphipathic beta strand  __ Amphipathic alpha helix