Review the image(s) and answer the following questions.

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1		What is the basis for the order of elements within the rows of the periodic table?
			A)	listed alphabetically, using Latin names
			B)	according to atomic number
			C)	ordered using atomic weight
			D)	listed by solids, gases, or liquids
2		What is the reason for listing the elements in certain vertical columns within the periodic table?
			A)	Each column represents elements having the same number of neutrons.
			B)	Each column represents elements with the same total number of electrons.
			C)	Each column is a family of elements with similar properties.
			D)	None of these is correct; the arrangements are random.
3		How many electrons are in the outermost shell of nitrogen?
			A)	5
			B)	6
			C)	3
			D)	8

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4		What is missing from this diagram at letter "A"?
			A)	energy source
			B)	the proper enzyme needed to cause these reactions to proceed
			C)	semipermeable membrane
			D)	heat
5		Why is water a necessary component of the diets of most organisms?
			A)	Water is needed to cause these reactions to go in reverse.
			B)	Water is needed for hydrolysis reactions in cells.
			C)	Water helps to maintain the proper osmotic balance within cells and is used to distribute materials.
			D)	All of these are correct.

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6		How does the chemical structure of a saturated fatty acid differ from the structure of the unsaturated fatty acid shown here?
			A)	A saturated fatty acid has more oxygen than an unsaturated fatty acid.
			B)	A saturated fatty acid is more oily and can withstand higher temperatures.
			C)	There are no double bonds in a saturated fatty acid; all the positions are saturated with hydrogen.
			D)	The fatty acid is saturated with double bonds, making the molecule twist and curl.
7		How does the food industry prepare partially-hydrogenated margarine from unsaturated plant oils?
			A)	add solidifying chemicals
			B)	freeze the oils
			C)	add hydrogen atoms, thus saturating the oils
			D)	dehydrate the oils

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8		Choose the statement that is true about peptide bonds.
			A)	A peptide bond is an ionic bond occurring between adjacent amino acids.
			B)	A peptide bond is a covalent bond that occurs only between amino acids.
			C)	Peptide bonds occur in all organic macromolecules.
			D)	A peptide bond is a special type of hydrogen bond found only in large protein molecules.
9		Peptide bonds occur between what two functional groups of adjacent amino acids?
			A)	carboxyl group of one amino acid and amino group of the other
			B)	hydroxyl group of one amino acid and the sulfhydryl group of the other
			C)	carbonyl group of one amino acid and the carboxyl group of the other
			D)	phosphate group of one amino acid and the hydroxyl group of the other