Download (pt=2) What is an acid?

Name ______________________________________
FES 100 - Introduction to Forest Biology
Exam 1: 100 points October 1, 2008
For short answer questions, be brief; full sentences are not necessary. Point value for each question is in
parentheses. If a question is not clear to you, please ask for clarification.
Write your name on this page now!!!!!!
1.
(pt=3)
Give one important way that you can distinguish a written statement as being scientific or
not::
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2.
(pt=3)
What are three, clear characteristics that can distinguish between something that is living or
not living.
a)______________________________________________________________________________
b)______________________________________________________________________________
c)______________________________________________________________________________
3.
(pt=2)
What is one key characteristic of a good, scientific hypothesis:
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4.
(pt=6)
What are the 3, primary premises (assumptions) in Darwin’s theory of natural selection:
a)______________________________________________________________________________
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b)______________________________________________________________________________
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c)______________________________________________________________________________
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5.
(pt=2)
What is the primary difference between bacteria and eukaryotic cells?
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6.
(pt=5)
What are the fundamental attributes of a healthy forest?
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7.
(pt=4)
What are at least 2 reasons why trees and plants must make-up 90% of a forest?
a)______________________________________________________________________________
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b)______________________________________________________________________________
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8.
(pt=2)
What is a niche?
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9.
(pt=2)
What is an example of a disturbance that has evolved with the Maine forest?
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10. (pt=4)
Make a sketch of the water molecule showing protons and the electron cloud:
11. (pt=4)
Make a sketch illustrating how water can dissolve salt (sodium chloride). Be sure to show
any charges:
3
12. (pt=3)
Why can carbon form 4 covalent bonds and nitrogen only 3?
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13. (pt=1)
Which chemical characteristic of water gives it cohesion and a high specific heat:
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14. (pt=1)
If pH=7, then water has no hydrogen ions:
Yes
No
15. (pt=1)
If a water solution has a concentration of 10-10 mole of OH- ions, how many H+ ions does it
have?
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16. (pt=2)
What is an acid?
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17. (pt=2)
If a carbohydrate has 3 carbons, what is its complete chemical formula?
18. (pt=2)
Write or sketch the make-up of the carboxyl functional group:
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19. (pt=2)
What chemical reaction occurs that makes cellulose from glucose? (term or sketch)
20. (pt=3)
Sketch or describe a fatty acid:
21. (pt=5)
Describe or sketch the 3 basic parts of an amino acid that allows it to react with other
molecules:
22. (pt=1)
What is an organic molecule?
______________________________________________________________________________
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23. (pt=5)
Make a sketch of cross section from a cell membrane. Be sure to label phospholipid,
phosphate end, hydrocarbon end, hydrophobic area, hydrophilic area, protein.:
24. (pt=5)
Illustrate or describe how osmosis can create osmotic pressure:
25. (pt=4)
What are 2 different ways in which a sugar molecule can move across the plasma
membrane (describe or sketch):
a)
b)
6
26. (pt=6)
Use a graph to illustrate an endogonic reaction, and indicate how an enzyme will affect this
reaction with a dashed line. Label the axis and activation energy :
27. (pt=2)
What is potential energy?
______________________________________________________________________________
______________________________________________________________________________
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28. (pt=1)
What is the most abundant form of energy in a cell?
______________________________________________________________________________
29. (pt=3)
Relate the first law of thermodynamics to an exergonic reaction:
______________________________________________________________________________
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30. (pt=1)
Which has more potential energy, ATP or ADP ? (circle the correct answer)
31. (pt=3)
Why is the shape of an enzyme so important? (1 major reason)
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32. (pt=3)
What helps to maintain the shape of an enzyme? (2 factors)
a)______________________________________________________________________________
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b)______________________________________________________________________________
33. (pt=1)
What is changed in an enzyme after it catalyzes a reaction?
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34. (pt=2)
What is the endosymbiosis hypothesis?
______________________________________________________________________________
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35. (pt=4)
Describe or sketch how a change in pH can stop the functioning of an enzyme:
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