Biology 11 Unit 2
DNA Worksheet 1
Name: ________________________
DNA Worksheet 1
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DNA is a polymer which means it is made of many repeating single units called monomers. What are the
monomers of DNA called? _______________________________________________
There are 4 different variations of these monomers. (4 different bases) What are they called?
The base _________________, which always pairs with _____________________
The base _________________, which always pairs with _____________________
Which bases are purines? _______________________________ and ______________________________
Which bases are pyrimidines? _______________________________ and ___________________________
Structurally, how are purines and pyrimidines different and/or similar to each other?
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Before the structure of DNA was known, there were 3 things genes were known to be able to do. What are those
3 things?
1) ______________________________________________________________________________________
2) ______________________________________________________________________________________
3) ______________________________________________________________________________________
What are the 3 parts of each nucleotide?
1) _______________________________________________________
2) _______________________________________________________
3) _______________________________________________________
What is Chargaff’s Rule?
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According to Chargaff’s Rule, if a strand of DNA is found to be 23% Adenine, what percent of it would be Guanine?
__________________________________
In eukaryotic cells where is DNA found? ____________________________________________________________
In prokaryotic cells where is DNA found? ___________________________________________________________
Who discovered the structure of DNA? _________________________ and ________________________________
What did Rosalind Franklin contribute to the discovery?
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What do we call the shape of DNA? ________________________________________________________________
What is the end product of replication? ____________________________________________________________
Why and when do cells replicate their DNA?
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Why is DNA replication called “semi-conservative”?
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Fill in the complimentary bases for this strand of DNA
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A C A G T C A G C C T C A G T G A A C T G G A C A A C T T G C G A C T
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Biology 11 Unit 2
DNA Worksheet 1
21. Explain what DNA Polymerase does.
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22. Explain what Helicase does.
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23. Colour the diagram below. Use the same colour for each of the components.