Name: _____________________________________
Date: __________
Period: ______
Part 1: DNA Structure
Go to http://www.biologycorner.com/APbiology/DNA/13-2_DNA_structure.html
Draw a DNA molecule 4 base pairs long in the box below. Must show double ringed purines and single
ringed pyrimidines. Also, draw and label the three parts of a nucleotide.
DNA
Nucleotide
Part 2: DNA Replication
Go to http://www.stolaf.edu/people/giannini/flashanimat/molgenetics/dna-rna2.swf Answer the following
questions as you move through the animation of DNA replication. Before clicking
1. What class of proteins are the molecules with –ase endings? ______________
2. Draw a portion of the DNA molecule on the screen.
Click on the large arrow once. (total of one click)
3. Draw the portion of DNA that has “unzipped”.
What enzyme was doing the “unzipping”? _________________________________
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More DNA Replication
Click on the large arrow again (total of 2 clicks).
4. What begins to happen on one of the “unzipped” strands? ________________________________
______________________________________________________________________________
5. What enzyme is responsible for this? _________________________
Click several more times slowly and study what happens.
6. Can you hypothesize what function the enzymes could have in this process? (hint: what is the function
of enzymes? ) ___________________________________________________________________.
7. Draw a diagram and create an explanation of each step of DNA replication
(Include what you start and end with & what happens in between)
Drawings
Explanations
Part 3: RNA
Go to http://www.dnaftb.org/dnaftb/21/concept/index.html
Read the text and answer the following questions
8. Where is RNA commonly found? ______________________________________.
9. Describe what is meant by the “central dogma” in biology. ________________________________
_______________________________________________________________________________
10. Name the 3 types of RNA and the general roles they play in the making of protein.
- ___________________________________________________________________
- ___________________________________________________________________
- ___________________________________________________________________
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Click on the animation button below. Step through the animation and compare and contrast the
structure of RNA to DNA. Draw a double bubble diagram to compare and contrast.
Draw a sketch of an RNA molecule (at least 6 nucleotides long using the all the appropriate
nitrogen bases at least once).
Part 4: Transcription (DNA  RNA)
Go to http://www.stolaf.edu/people/giannini/flashanimat/molgenetics/transcription.swf Answer the
following question Before clicking
11. What molecule is displayed on the screen now? _____________
Click once
1 2. What type of molecule is the RNA polymerase? ______________________
Click again
13. What function does the RNA polymerase have? ______________________________________
14. Where in the cell do you think this is taking place? _______________________
15. What is the new red molecule called? __________.
16. Explain how the mRNA molecule forms.
________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
Click again
17. What nitrogen base replaces thymine on the RNA molecule? _______________.
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Part 5: Translation (mRNA  protein)
Go to http://www.stolaf.edu/people/giannini/flashanimat/molgenetics/translation.swf
Answer the following question Before clicking
18. What molecule is displayed on the screen now? _________.
19.Name one reason how you know. _________________________________________.
Click once
20. Where in cell in this taking place? ___________________.
Click again
21. What type of molecule is the tRNA (transfer RNA) bringing to the mRNA? __________________.
22. Draw and label the tRNA molecule.
Click until the end watching the process of translation
23. As the tRNAs dock on the mRNA bringing amino acids with them what type of molecule is created?
__________________________.
Start the animation over
24. Write a summary of translation using words and a sketch
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