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Transcript
Genetics
DNA
1. What do the letters DNA stand for?
___________________________________________________
2. Two scientists are given credit for discovering the structure of DNA.
What is the name of those two scientists?
________________________and____________________________
They determined that the shape of the molecule was a
_______________________ _______________________.
3. DNA is a polymer, which means that is made up of many repeating
single units (monomers). What are the monomers called?
___________________________________________________
4. Draw the basic structure of a monomere with its three parts.
5. The “backbone” of the DNA molecule is made up of two components, what are these?
c. _______________________________
d. _______________________________
6. There are four different variations of these monomers (four different bases), what are the names of
those bases?
a. _______________________________
b. _______________________________
c. _______________________________
d. _______________________________
Genetics
7. These bases are of two different types of molecules: purines and pyrimides. Purines have
_______________________ ring(s) in their structure, and pyrimidines have _______________________
ring(s) in their structure.
8. The two bases that are purines are:
a. _______________________________
b. _______________________________
9. The two bases that are pyrimidines are:
a. _______________________________
b. _______________________________
10. Chargaff’s rule states that the DNA of any species contains equal amounts of ___________________
and _______________________ and also equal amounts of ________________and _________________.
11. Based on this information, scientist could predict that the base _______________________ pairs with
_______________________ and the base _______________________ pairs with ___________________
____ in the formation of the DNA molecule.This is called complementary base pairs. Thus one strand of
DNA is complementary to the other strand (opposite/matching).
12. The bases are paired by _______________________ bonds along the axis of the molecule.
13. Write the complementary sequence to following DNA strand:
A A T T C G C C G G T A T T A G A C G T T
14. What is gene?
15. What is difference between exons and introns?
exons ______________________________________________
introns _____________________________________________