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.

Is the bolded statement TRUE or FALSE. The hydrophobic effect is a very important noncovalent interaction within biological systems.  Classify the following statements as true or false given this subject (for any statement that mentions the “system” assume it includes the solvent and the solute). When it takes place, it can cause the free energy change (dG) to be negative for the system. Occurs spontaneously as it leads to a reduction in the entropy of the solvent. Cannot occur without a polar solvent. When it takes place, will lead to an increase in entropy of the system. Is driven by bond formation and disruption. 

Matching Instructions-Fill in the correct bubble for the BEST answer to each of the following: There is only one correct answer per question and each response is worth 1.5 points.  This section is worth a total of 15 points.

A client calls. “My dog was diagnosed with epilepsy 3 years ago and is on oral phenobarbital. His seizures have been well controlled. Today he had 3 seizures in the last 4 hours, they only lasted 1-2 minutes. But this is very unusual for him. He is not back to normal yet and the last seizure was over an hour ago. ” You will recommend: