Download History of DNA

History of DNA
1. Proteins are made of different combinations of the 20 different _______________.
2. DNA is a polymer molecule composed of repeating units (monomers) called
______________________.
3. Amino acids are connected to each other by _________________ bonds.
4. What scientists showed the amount of the 4 nitrogen bases present in DNA?
5. What bases are complementary (pair with each other) on DNA?
6. What type of bonds join base pairs on DNA?
7. Are these strong or weak bonds?
8. Who built the first model of DNA?
DNA Structure
Label the diagram of DNA using the terms below:
Nucleotide
deoxyribose sugar
phosphate backbone
nitrogenous base
hydrogen bonding
#4
#1
#3
#2
#5
9. Write the complimentary base pairing of the following half strand of DNA:
T C A G C C G T T A G C G G A T G C G T A
10. DNA is two coiled strands known as a ___________________.
11. What makes up the sides of a DNA molecule?
12. What type of bond connects the deoxyribose sugars to the phosphate groups?
13.
Where are the nitrogen bases found on DNA & how are they bonded to each other?
14. DNA stands for ___________________________.
15.
______________ are the subunits making up DNA.
16. Name the 3 parts of a nucleotide.
17.
Why is deoxyribose called a pentose sugar?
18. Double ring nitrogen bases are called ____________, while single ring nitrogen bases are
called ________________.
19. Name the purines.
20. Name the pyrimidines.
21. Purines will only pair with ________________.
22. If there is 30% adenine present in a segment of DNA, how much cytosine would be present?
DNA Replication
23. Cells must copy their DNA before they divide. Explain why.
24. The process of copying DNA is known as DNA ________________.
25. What enzyme uncoils DNA so it can be replicated or copied?
26. DNA ______________ is the enzyme that adds new complementary base pairs.
27. Chemicals and _____________ radiation can damage DNA in our body cells so it must be
repaired.