Which of the following elements is NOI a trace element? A. Zinc B. Manganese C.

Question

Which of the following elements is NOI a trace element? A. Zinc B. Manganese C. Nitrogen D. Iron E. Fluorine 41. 42. Eicosanoids A. Are fat-soluble vitamins B. Are components of the plasma membrane C. Are structural proteins D. Play a role in the response of tissues to injuries E. Comprise of genetic material 43. _Which of the following organelles contain hydrolytic enzymes that digest materials? A. Peroxisome B. Mitochondria C. Lysosome D. Proteosome E. Contractile vacuole In a molecule of oxygen, two pairs of electrons are shared by two oxygen atoms. The type of bond that is formed would be an example of a(n) A. Single covalent bond B. Double covalent bond C. Triple covalent bond D. Polar covalent bond E. Hydrogen bond 44.

Explanation / Answer

41. Minerals required in only small amounts (<20 mg/day), are called trace elements.

C. Nitrogen.

42. Eicosanoids are essentially signaling molecules made by oxidation of PUFAs. Eicosanoids are a sub-category of oxylipins, i.e. oxidized fatty acids of diverse carbon units in length. Eicosanoids function in diverse physiological systems and pathological processes such as: mounting or inhibiting inflammation, allergy, fever and other immune responses; contributing to the perception of pain; regulating cell growth; controlling blood pressure; and modulating the regional flow of blood to tissues.

D. Play role in the response of tissues to injuries.

43. The lysosomes contain many hydrolytic enzymes such as proteases, nucleases, and lipases.

C. Lysosome.

44. A double covalent bond is where two pairs of electrons are shared between the atoms rather than just one pair. Two oxygen atoms can both achieve stable structures by sharing two pairs of electrons.

B. Double covalent bond

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