Download (pt=3) Two ways in which DNA and RNA are similar include

FES 100 Exam 1 page 1
FES 100 - Introduction to Forest Biology
Exam 1: 100 points October 6, 2004
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)
Do you consider Darwin's explanation of "natural selection" to be scientific? yes no
Support your answer with one major point:
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
2.
(pt=3)
Consider the following statement: "I saw a spruce forest that was completely killed. This
is bad and shouldn't happen." Is this statement scientific?
yes no
Explain: (1 reason)
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
3.
(pt=5)
Living systems are highly complex. Explain how DNA is critical in allowing life to
develop as we know it. (2 ways)
a)______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
b)______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
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Page 2
4.
FES 100 Exam 1
(pt=4)
Are forest ecosystems living? yes no
Explain:
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______________________________________________________________________________
______________________________________________________________________________
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5.
(pt=4)
Use the second law of thermodynamics to explain why ecosystems are 90% plants:
______________________________________________________________________________
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6.
(pt=4)
What is one example of a disturbance with which a forest has not evolved?
______________________________________________________________________________
How can this be harmful to the forest?
______________________________________________________________________________
______________________________________________________________________________
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______________________________________________________________________________
FES 100 Exam 1 page 3
7.
(pt=6)
Diagram how salt (NaCl or sodium chloride) can dissolve in water. Show examples of
ionic, hydrogen, and covalent bonds:
8.
(pt=4)
Diagram how pH can adversely affect an enzyme:
9.
(pt=3)
Why can carbon store so much potential energy?
______________________________________________________________________________
What type of kinetic energy can be provided by the potential energy stored on carbon?
______________________________________________________________________________
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Page 4
FES 100 Exam 1
10. (pt=4)
How does a fatty acid differ from a hydrocarbon? (describe or draw)
Why is the fatty acid better suited for use in a cell compared to a hydrocarbon?
______________________________________________________________________________
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11. (pt=5)
What determines the shape of enzymes?
______________________________________________________________________________
Explain why this is true:
______________________________________________________________________________
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______________________________________________________________________________
FES 100 Exam 1 page 5
12. (pt=6)
Make a sketch of an exergonic and endergonic reactions that show activation energy. For
extra credit, draw them to indicate the relative size needed for a coupled reaction.
13. (pt=6)
What are two opposite effects that heat can have on the activation energy in a chemical
reaction?
How heat favors a reactions:
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
How heat can inhibit chemical reactions in a living cell:
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
14. (pt=3)
Is diffusion a source of energy that a cell can use?
yes no
Explain (1 major reason):
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
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Page 6
FES 100 Exam 1
15. (pt=6)
Explain how the chemical properties of phospholipids make the bi-layer of the plasma
membrane semi-permeable: (use sketches) (2 reasons)
16. (pt=3)
If a cell needs to increase the import of glucose, how can this be done? (explain or sketch)
17. (pt=3)
Explain why cells must remain microscopic in size (1 primary reason)
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
18. (pt=2)
Diagram a Vesicle used for transporting material in a cell:
FES 100 Exam 1 page 7
19. (pt=1)
What is it about chloroplasts that support the Endosymbiotic hypothesis? (1 reason)
______________________________________________________________________________
______________________________________________________________________________
20. (pt=2)
Indicate which nucleotides will pair-up with each other:
A
B
C
D
A pairs with ______
________ pairs with _________
21. (pt=3)
Two ways in which DNA and RNA are similar include:
a)______________________________________________________________________________
b)______________________________________________________________________________
22. (pt=4)
What are two ways in which DNA replication is similar to RNA transcription?
a)______________________________________________________________________________
______________________________________________________________________________
b)______________________________________________________________________________
______________________________________________________________________________
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Page 8
FES 100 Exam 1
23. (pt=4)
Explain why an alteration in the DNA sequence can result in the cell not functioning
properly. Use the term "codon" in your answer.
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
24. (pt=5)
Which phase of mitosis is indicated by the diagram
at left: _____________________________________
What is happening during this phase (2 items)?
a)____________________________________________________
_____________________________________________________
b)____________________________________________________
_____________________________________________________
25. (pt=7)
Make a sketch of translation and protein synthesis using the following terms: mRNA,
tRNA, amino acid, polypeptide, ribosome, codon, anticodon
FES 100 Exam 1 page 9
Extra Credit:
26. (pt=3)
What are three strategies for academic success that you used in preparing for this exam?
a)______________________________________________________________________________
b)______________________________________________________________________________
c)______________________________________________________________________________
Explain why one of the strategies listed above will help the brain form a memory:
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________