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_________________________________NAME __________________PERIOD ________________Date
REVIEW: DNA STRUCTURE, FUNCTION AND REPLICATION
1. Label the diagram below with the following terms: phosphate, nitrogen base, deoxyribose.
2. List the four nitrogen bases and show how they pair up.
3. Which of the following is a monomer of DNA?
4. DNA molecules code for which biomolecule?
5. The sides of a DNA molecule are made up of alternating _____________ and ___________
molecules while the steps or rungs of the ladder are made of _____________
________________.
6. Scientists have sequenced and read a DNA strand. They found the strand to contain 23%
guanine, 23% cytosine, 77% thymine and 45% adenine. Was there an error in their results? If so,
explain why.
_________________________________NAME __________________PERIOD ________________Date
Use the following DNA strand to answer the following questions…
7. What is the correct sequence of nitrogen bases in the Y strand of DNA?
8. When the DNA molecule above is replicated, what will the resulting two strands consist of?
a. One DNA molecule with all new DNA strands and one molecule with the original DNA
strands
b. Each with one new DNA strand and one original DNA strand
c. Each consisting of new DNA only.
9. At which point in the diagram with the DNA molecule “unzip” during replication?
10. Write out the steps of DNA replication in order below.
11. What determines the individuality of an organism?
12. For the following DNA strand, write the correctly replicated daughter strand
5’ ATTCGTACCGTA 3’
13. What is the purpose of creating identical DNA strands during DNA replication?