At pH 3, the R-group of histidine is_______ and O protonated; neutral O protonated; positively charged O protonated; negatively charged O deprotonated; neutral O deprotonated; positively charged
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- Which of the following levels of protein structure may be affected by hydrogen bonding? (a) primary and secondary (b) primary and tertiary (c) secondary, tertiary, and quaternary (d) primary, secondary, and tertiary (e) primary, secondary, tertiary, and quaternaryReductase is the Fe protein composed of two: polypeptide chains linked by three disulfide bonds. polypeptide chains linked by a 4Fe–4S cluster. α subunits and two β subunits. polypeptide chains linked by a 2Fe–2S cluster.Which of the following amino acids undergoes phosphorylation? Histidine Glutamic Acid (Glutamate) Serine Isoleucine
- What type of intermolecular forces exists between the side chains of each of the following pairs of amino acids? serine and threonine isoleucine and valine arginine and aspartic acid cysteine and cysteineEach protein monomer is made up of four parts bound to a central carbon. List the 4 parts by nameWhich of the following amino acids would be most soluble in water? Group of answer choices glycine at pH 8 proline at pH 6 valine at pH 1 leucine at pH 4 alanine at pH 7
- A multimeric protein contains 20 or greater different amino acid residues At least 2 or more polypeptide chains At least 4 or more polypeptide chains 40 or greater different amino acid residuesarrange the following lipids in order of decreasing polarity: cholesterol, triglyceride, estradiol, fatty acid, phosphatidyl cholineWhich of the following is true of sphingolipids? They always contain glycerol and fatty acids. They may be charged, but are never amphipathic. They contain two esterified fatty acids. Phosphatidylcholine is a typical sphingolipid. The sphingosine backbone is O-linked to a head group.
- Which of the following reactions will occur only if coupled to a second, energetically favorable reaction? glucose + O2 → CO2 +H2O CO2 + H2O → glucose + O2 nucleoside triphosphates → DNA nucleotide bases → nucleoside triphosphates ADP + Pi → ATPThe symbol for the fatty acid below is ________________: ________________, n-____________________. CH3(CH2)2(CH=CHCH2)2(CH2)4COOH (This is a multiple blank question, e.g. for 12:1, n-3 you would enter 12, 1, and 3.)Which of the following pairs of molecules form the pyrimidine ring?a. Glutamate and carbamoyl phosphateb. Aspartate and glutaminec. Aspartate and carbamoyl phosphated. Glycine and carbamoyl phosphate