Arginine is considered a basic amino acid because its side chain ________ at physiological conditions (around pH 7). a. is protonated b. has a low pKa c. proton is titrated away d. is hydrophobic
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Arginine is considered a basic amino acid because its side chain ________ at physiological conditions (around pH 7).
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- Amino acids show unusual chemical behavior especially because they A) are all found in living organisms. B) contain the amide functional group. C) are chiral. D) contain both an acidic and a basic functional group on the same molecule. E) contain the elements carbon, hydrogen, oxygen and nitrogen.Which of these are NOT components of an amino acid? hydrophilic tail b. side chain c. carboxyl group d. a hydrogen atom e. central carbon atomAt the physiological pH in the human body, amino acids are typically in the zwitterionic form. What is a zwitterion? A. A molecule that has parts that are charged but has an overall neutral charge. B. A molecule that has parts that are neutral but has an overall positive or negative charge. C. A molecule that has is charged at physiological pH. D. A molecule that has more than 1 charged ion.
- Part A: The bonds between these amino acids are _____ bonds. A. Peptides B. ionic Part B: switching the position of two of these amino acids ______ result in a different protein. A. Will not B. WillAmino acids with non-polar side chains are zwitterions at a. middle pH levels, between the pKa’s of the amino and carboxyl groups. b. very low pH, where the hydrogen ion concentration is high. c. none of the above. d. the pKa of the side chain.The presence of a core alpha C atom distinguishes amino acids. o b. R group amino acids The molecule's lengthy carbon-hydrogen tails. d. The amino acid's glycerol backbone.
- Which of these are considered “part” of each amino acid? A. Carboxyl acid group B. All of the options are correct C. R Group D. Amino groupWhich of the amino acid side-chains would you expect to be protonated (i.e. has not lost its proton) under neutral pH conditions? Include reasons supporting your prediction.Fatty acids in phospholipids and triacylglycerols interact with one another by (a) disulfide bridges (b) van der Waals interactions (c) covalent bonds (d) hydrogen bonds (e) fatty acids do not interact with one another
- Explain what happens if even one amino acid is substituted for another in a polypeptide chain. Provide a specific example.Amino acid Tyrosin (Y) is belong to which classification group? A. Polar Hydrophobic B. Nonpolar Hydrophilic C. Acidic D. Polar HydrophilicIn order for proteins to function properly the neccessary amino acids must have a specific what? A. Sequence B. Bond C. Number D. Compound
