1.  Nitrogen fixation is a natural process by which inert or
unreactive forms of nitrogen are transformed into usable nitrogen. Why is this
process important to life?2.  Given what you have learned about the hydrogen bonding
shared between nucleic acids in DNA, which pair is more stable under increasing
heat: adenine and thymine, or cytosine and guanine? Explain why.3. 
Which of the following is
not an organic molecule; Methane (CH4), Fructose (C6H12O6),
Rosane (C20H36), or Ammonia (NH3)? How do you
know? 1.  Write a statement to explain the molecular composition of
the unknown solution based on the results obtained during testing with each
reagent.2.  How did your a priori predictions from Table 1 compare to
your actual results in Table 2? If there were any inconsistencies, explain why
this occurred. 3.  Identify the positive and negative controls used in this
experiment. Explain how each of these controls are used, and why they are
necessary to validate the experimental results.4.  Identify two regions which proteins are vital components in
the human body. Why are they important to these regions?5.  Diet and nutrition are closely linked to the study of
biomolecules. Describe one method by which you could monitor your food intake
to ensure the cells in your body have the materials necessary to function.1.  What can you conclude about the molecular make-up of
potatoes and onions based on the two tests you performed? Why might these foods
contain these substance(s)?2.  What results would you expect if you tested ribose, a
monosaccharide, with Benedict’s solution? Biuret solution?1.  What is the purpose of determining the pH of the acetic
acid and the sodium bicarbonate solution before testing the other household
substances?2.  Compare and contrast acids and bases in terms of their H+
ion and OH- ion concentrations.3.  Name two acids and two bases you often use.

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