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Is the bolded statement TRUE or FALSE? Hydrogen bond(s): 26. only form in polar solvents. 27. are interactions between dipoles that are formed (the dipoles) when atoms of differing electronegativity form covalent bonds. 28. formation is not important in protein folding as large numbers of hydrogen bonds must also be broken between the unfolded protein and the solvent. 29. when forming, can contribute to a negative change in enthalpy. 30. when forming, can contribute to a negative change in free energy.

You are the triage nurse today. A Yorkie has just arrived at your hospital that was attacked by a larger dog.   While assessing the respiratory system, you are concerned that this patient has significant respiratory trauma.  List 2 abnormal findings you may have noticed during triage.

Most vitamin A is stored in the

The only cells which do not contain mitochondria are 

Respiratory arrest usually occurs before a cardiac arrest in dogs and cats.

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.

Which fat-soluble vitamin is important for the health of epithelial cells because it promotes mucus production?

Is the bolded statement TRUE or FALSE? Changes in bond enthalpy are calculated by taking the difference between the enthalpy of the bonds broken and the enthalpy of the bonds formed (dH = Hbonds broken – Hbonds formed).  Given this changes in bond enthalpy: 16. are always negative for a reaction in which more bonds are formed than broken. 17. when positive, indicate the formation of bonds. 18. when negative, will destabilize a system (such as a protein), and are therefore considered thermodynamically unfavorable. 19. are always positive for an endergonic process. 20. would be negative if hydrogen bonds were being broken in order to form covalent bonds.

Metabolism takes place in

Is the bolded statement TRUE or FALSE? Changes in bond enthalpy are calculated by taking the difference between the enthalpy of the bonds broken and the enthalpy of the bonds formed (dH = Hbonds broken – Hbonds formed).  Given this changes in bond enthalpy: 16. are always negative for a reaction in which more bonds are formed than broken. 17. when positive, indicate the formation of bonds. 18. when negative, will destabilize a system (such as a protein), and are therefore thermodynamically unfavorable. 19. are always positive for an endergonic process. 20. would be negative if hydrogen bonds were being broken in order to form covalent bonds.