Bio. 101 Exam

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Shelby21
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234578
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Bio. 101 Exam
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2013-09-12 23:55:44
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test
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chap. 1,2,3
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  1. What are the 8 steps of the scientific method?
    • observing
    • recognizing a problem or stating a question
    • develop a hypothesis
    • make a prediction that can be tested
    • make further observations
    • perform experiments
    • interpret results
    • draw conclusions
  2. A tentative explanation for observations or phenomena.
    hypothesis
  3. A ______is an idea or set of ideas that is intended to explain facts or events.
    theory
  4. A mathematical variable whose value is determined by that of one or more other variables in a function is called a _______ variable.
    dependent
  5. A mathematical variable that is independent of the other variables in an expression or function is a _______ variable.
    independent
  6. What are the 6 characteristics of life?
    • organization
    • growth and development
    • self- regulated metabolism
    • ability to respond to stimuli
    • reproduction
    • adaptation
  7. ________ are inherited characteristics that enhance an organisms ability to survive in a particular environment.
    Adaptations
  8. Name the 2 types of reproduction.
    asexual and sexual
  9. _______ is defined as all the changes that take place during an organisms life.
    development
  10. The sum of all chemical activities of an organism.
    metabolism
  11. _______ is an increase in the size of individual cells of an organism.
    Growth
  12. Physical or chemical changes in their internal or external environment is a _______ response.
    stimuli
  13. A balanced internal environment.
    homeostasis
  14. Name the 8 taxonomic classifications.
    • species
    • genus
    • family
    • order
    • class
    • phylum
    • kingdom
    • domain
  15. Name the 3 Domains.
    • bacteria¬†
    • archaea
    • eukarya
  16. ________ require complex organic compounds for metabolic synthesis.
    heterotrophs
  17. ________ require only one carbon and a simple inorganic nitrogen for metabolic synthesis.
    autotrophs
  18. Substances that cannot be broken down by ordinary chemical reactions.
    elements
  19. The smallest portion of an element.
    atom
  20. Every element has a fixed number of protons called its
    atomic number
  21. ______ ____ is a number that indicates approximately how much matter it contains.
    atomic mass
  22. The mass of a molecule that is equal to the sum of the masses of all the atoms contained in the molecule.
    molecular mass
  23. ______ determine the chemical behavior of an atom.
    valence electrons
  24. Positively charged ion.
    cation
  25. Negatively charged ion.
    anion
  26. A _____ is the amount of an element or compound whose mass in grams is equal to its atomic or molecular mass.
    mole
  27. Avogadro's number?
    6.02*1023
  28. In ______ bonds electrons are shared to fill the valence shell.
    covalent
  29. ______ bonds form because of the attraction between the cation and the anion.
    Ionic
  30. ___________ contain from 3 to 7 carbon atoms.
    monosaccharides
  31. ___________ contain 2 monosaccharide rings.
    disaccharides
  32. ___________ are macromolecules consisting of repeating units of simple sugars, usually glucose.
    polysaccharides
  33. 4 levels of protein structure
    • primary structure
    • secondary structure
    • tertiary structure
    • quaternary structure
  34. _______ structure is the sequence of amino acids, joined by peptide bonds.
    primary
  35. ______ structure defines function and stucture.
    Secondary
  36. ________ structure is the overall shape assumed by each individual polypeptide chain.
    Tertiary
  37. ________ structure is the 3-D structure.
    Quarternary
  38. When proteins change shape due to changes in pH, temperature, or exposure to certain chemicals it is called ________
    denaturation

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