Biology 1408 Chapters 1,2,3

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Biology 1408 Chapters 1,2,3
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2013-09-17 01:33:50
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Biology 1408 Chapters 1,2,3,
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  1. The main difference between an autotroph and a heterotroph is...
    how they obtain energy
  2. The basic difference between a prokaryotic cell and a eukaryotic cell is that the prokaryotic cell
    lacks a nucleus
  3. In evolutionary terms, which cell listed is considered to be most primitive?
    prokaryotic
  4. Which correctly indicates the sequence of increasing organization?
    cell, tissue, organ, organ system
  5. A typical animal would be characterized by all of the following EXCEPT
    All of these are true
  6. We use the scientific method every day. Imagine your car doesn't start one morning before school. Which of these is a reasonable hypothesis regarding the problem?
    I'm out of gas
  7. You observe a plant on your windowsill that is growing at an angle toward the outside. This is an example of a living thing
    responds to stimuli
  8. A carefully formulated scientific explanation that is based on a large accumulation of observations and is in accord with scientific principles is termed a/an
    theory
  9. Which is NOT an example of evolution?
    A dog learns how to open the cabinet where its food is kept.
  10. A mutation is...
    a change in DNA sequence
  11. What is the maximum number of covalent bonds an element with atomic
    number 8 can make with hydrogen?
    2
  12. What is the difference between covalent bonds and ionic bonds?
    Covalent bonds involve the sharing of electrons between atoms; ionic bonds involve the electrical attraction between atoms
  13. How does one explain the formation of ions?
    gain or loss of electrons
  14. If a substance measures 5 on the pH scale, that substance
    • has greater concentration of H+ than OH-
    • ions
  15. Which of the following would be least affected by the presence of water?
    a nonpolar covalent bond
  16. Which of the following represents a molecule characterized by polar
    covalent bonding?
    H2O
  17. Phosphorus has an atomic number of fifteen, so what will be the distribution of its electrons?
    • The first energy level will
    • have two, the second will have eight, and the third will have five.
  18. Why is a neon atom (Atomic #10) more stable than a nitrogen atom (Atomic #7)?
    Eight electrons completely fill its outermost electron shell.
  19. What determines the cohesiveness of water molecules?
    hydrogen bonds
  20. A substance with specific properties that cannot be broken down or converted to another substance is a(n)
    element
  21. Which of the following BEST summarizes the relationship between dehydration reactions
    and hydrolysis?
    Dehydration assembles polymers, hydrolysis breaks down
  22. Of what are fats composed?
    3 fatty acids, and 1 glycerol
  23. Which of the choices is a monosaccharide found in DNA?
    deoxyribose
  24. Organisms contain thousands of different proteins composed of ________ different amino
    acids.
    20
  25. Which of the following may possess primary, secondary, tertiary and quaternary
    structure?
    proteins
  26. Which of the following macromolecules possess large nonpolar regions making them
    insoluble in water?
    lipids
  27. Phospholipids are unusual and important to cell structure because…
    they have a polar and non polar end
  28. A nucleotide is...
    Phosphate, sugar, base
  29. Chitin in an example of a ______.
    Polysaccharide
  30. When a hydrolysis reaction breaks down the disaccharide sucrose, what two monosaccharides are produced?
    Glucose and fructose

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