quiz for biology

• atom smallest component of matter
• nucleus made up of protons(positively charged)and neutrons (no charge)
• atomic mass protons and neutrons
• proton atomic number minus atomic mass
• isotopes same elements but different atomic mass
• molecules result of reaction of two or more atoms of the same elements(only made with covalent bond )
• valence electrons number electrons in the outermost shell
• octet bond 8 bond with other elements
• octet rule every elements should have 8 electrons
• covalent electron being shared (non metals)
• chemical bond ionic covalent hydrogen
• cation gives electron
• ionic electron are donated or transformed into another elements
• anion gains electrons
• hydrogen bond hydrogen combine with oxygen or another electromagnetic atom
• organic molecules carbon and hydrogen associated with living organism held together by covalent bond
• macromolecules carbohydrates lipids protein nucleic acid
• ch2O carbohydrates main source of energy
• monnosaccharides simple sugar,most simpliest form of sugar, glucose fructose lactose
• dissaccharides two monnosaccharides sucrose lactose maltose
• polysaccharides many monnosaccharide
• glycogen stored glucose glycogenology
• lipids composed of carbon hydrogen and oxygen with no difinite ratio
• simple lipids triglycerides composed by 3 fatty acid bonded to glycerol
• glycolipids compound lipids lipids found in combination with other compounds
• phospoliphids found in our cell membrane
• cholesterol steroids for fused rings of carbon atom with functional groups attached
• protein composed of carbon hydrogen oxygen and nitrogen plus other elements such as sulfur iron iodine
• fibrous protein polypeptides are arraged pararell along a single axis to producelong fibes or sheet
• globular protein spherical in shape
• conjugated protein simple protein in union
• nucleic acid carbon hydrogen oxygen nitrogen and phosphorus group
• Unicellular organism


  Organism made up of only one cell
• Unicellular organisms

  • Bacterium
  • Amoeba
  • Yeast
• Multicellular organism


  Organism made up of more than one cell
• Multicellular organisms


  • Plants
  • Animals
  • Insects
• Mycoplasma is the smallest cell, size 0.1 millimeter
• Ostrich egg is the largest cell, size 18 cm
• Compound microscope

  Magnification 20000x
• Electron microscope


  Magnification 500000x