Some niacin is formed in the body from

All of the following are true statements regarding fat malabsorption except

Metabolism is ___ of the chemical reactions that take place within all the cells in the body.

Is the bolded statement TRUE or FALSE?   In class we spent a significant amount of time discussing the structural features of the peptide backbone.  Given this which of the following statement(s) is (are) true?  41. All conformations of the backbone are energetically equivalent. 42. Each amino acid can have at least two dihederal angles that, when changed, result in a new conformation for the peptide backbone. 43. Some phi/psi angles are not favored because they cause steric clashes in the backbone. 44. The cis configuration for the peptide bond, if adopted in the absence of a proline, will destablize the protein. 45. Formation of an alpha-helix requires backbone hydrogen bonding but NOT specific phi/psi angles adoption.

The sequence of reactions that convert compounds from one form to another is

The energy source which cells use to fuel metabolic reactions is

We get most of the sulfur in our diet from

The powerhouse of the cell which generates most of the cell’s energy through aerobic metabolism is called the

Oxalic acid can inhibit the absorption of

Is the bolded statement TRUE or FALSE? The primary and secondary structure of proteins represent the first two levels in the hierarchy of protein structure. Classify the following statements as true or false. 46. The primary structure is held together by hydrogen bonds.  47. An α-helix will be destablized by the placement of an Arg four amino acids away from a Glu at pH 7.0. 48. The hydrophobic effect is the primary stabilizing interaction for formation of secondary structures.49. An α-helix will have phi/psi angles similar to that of a β-sheet.  50. Parallel and antiparallel β-sheets are made of strands that have R-groups that face perpendicular to the plane of the sheet and alternate sides of the sheet.