Chapter Questions
Choose the list that goes from the lightest to the heaviest:a) proton, atom, molecule, electron.b) atom, proton, molecule, electron.c) electron, proton, atom, molecule.d) atom, electron, proton, molecule.e) proton, atom, electron, molecule.
An oxygen atom has an atomic number of $8 .$ It typically forms:a) no covalent bonds because it contains 8 electrons.b) two covalent bonds because it contains 6 electrons in its valence shell.c) weak hydrogen bonds with two hydrogen atoms to form a water molecule.d) one covalent bond with a carbon atom to form carbon dioxidee) ionic bonds with another oxygen atom.
Dehydration synthesis is involved in the synthesis of all of the following excepta) DNA.b) proteins.c) polysaccharides.d) lipids.e) monosaccharides.
The primary structure of a protein relates to itsa) sequence of amino acids.b) length.c) shape.d) solubility.e) bonds between amino acids.
Pure water has all of the following properties excepta) polarity.b) ability to dissolve lipids.c) $\mathrm{pH}$ of 7d) covalent joining of its atoms.e) ability to form hydrogen bonds
When the pH of a solution changes from 3 to $8,$ the $\mathrm{H}^{+}$ concentrationa) decreases as the solution becomes more basic.b) decreases as the solution becomes more acidic.c) increases as the solution becomes more acidic.d) increases as the solution becomes more basic.e) does not change as the solution becomes more basic.
A shortage of nitrogen (N) would make it most difficult to construct a molecule ofa) cellulose.b) cholesterol.c) enzyme.d) triglyceride.e) glucose.
Complementarity plays a major role in the structure ofa) proteins.b) lipids.c) polysaccharides.d) DNA.e) RNA.
A bilayer is associated witha) proteins.b) DNA.c) RNA.d) complex polysaccharides.e) phospholipids.
The function of a buffer is toa) bring the pH of a solution to neutral.b) speed up chemical reactions within a cell.c) interact with phospholipid molecules to form a cell membrane.d) stabilize the pH of a solution.e) provide energy for synthesis of ATP.