biology

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Across
  1. 3. large biomolecules and macromolecules that comprise one or more long chains of amino acid residues.
  2. 4. it mean there is more out side then inside the cell
  3. 6. it means there is more in the cell then outside
  4. 8. there is a equal amount of the outside and inside the cell
  5. 9. type of energy
Down
  1. 1. a class of lipids whose molecule has a hydrophilic "head" containing a phosphate group and two hydrophobic "tails" derived from fatty acids,
  2. 2. transport= a type of membrane transport that does not require energy to move substances across cell membranes.
  3. 5. principal sterol of all higher animals, distributed in body tissues, especially the brain and spinal cord,
  4. 7. transport= substances move against the concentration gradient, from an area of low concentration to an area of high concentration.