Chemical components of the cell

Living cells compound of atoms
1. Atoms have core with neutrons and protons(+) surrounded electron
  1. The number of electrons in an atom = number of protons of the core
Living cells are composed of C.,H,O,N
1. Living organisms contain sugars, aminoacids, fatty acids and nucleotides
  1. Sugars are a primary source of chemical energy for cells.
    1. Principal function: store energy
      1. glucolisis
      2. citric acid cycle
      3. photosyntesis
    2. Examples:
      1. monosacharides
        glucose
      2. polisacharides
      3. oligosacharides
  2. Fatt acids are important to formation of cell membranes
    1. hydrophobic region and carboxilic acid
    2. phospholypids
      1. bilayer
  3. Nucleotides are important for energy transfer (RNA, DNA)
    1. C, A, T, G, U
    2. nytrogen cycle
  4. Protein molecules (RNA / DNA) are synthesized by condensation repetitive reactions
    1. aminoacids
    2. alpha helix, beta sheets
Molecule: two or more atoms joined by chemical bonds
1. Ionic bond: the atom gives up electrons to another. Its a type of electrostatic attraction
2. Covalent bond: two atoms share an electron pair. Different binding strength
  1. Polar covalent bond: When the electron pair is shared unequally

Resource summary

	Created by Lau Ibañez over 8 years ago

	Copied by Cristal Aimeé Jiménez García over 8 years ago