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20 Cards in this Set
- Front
- Back
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the atomic number of an element
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equals the number of protons in an atom
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the atomic weight of an element
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equals the number of netrons plus the number of protons
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which of the following statements about the isotopes is NOT true
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they all have the same number of neutrons
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which of the following statements about covalent bonds is NOT true
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only a single covalent bond can form between two atoms
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hydrophobic interactions
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can hold two nonpolar molecules together
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which of the following statremnts about water is NOT true
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it realeases a large amount of heat when changing from liquid into vapor
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the reaction HCL-H+ + CL- in the humal stomach is an example of the
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formation of ions by dissolving an acid
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the hydrogen bond between two water molecules arises because water is
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polar
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when the table salt(NaCl) is added to water
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Na+ and Cl- ions are separed
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The three most abundant elements in a human skin cell are?
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Carbon, hydrogen, oxygen
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the most abundant molecule in the cell
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water
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all lipids are
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more soluble in nonploar solvents than in water
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all carbs
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consist of one or more simple sugars
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which of the following is not a carb
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cellulose
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all proteins
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have quaternary structures
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which of the following statements about the primary structure of a prtoein is not ture
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it may be branched
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the amino acid leucine
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is hydrophillic
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the qyaternary stucture of a protein
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consists of four subunits
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all nucleic acids
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are double stranded
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which of the following satements about condensation reactions is not true
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polysaccharide synthesis results from them
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