DNA Structure
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View the animated interactive tutorial pages of DNA structure A, B, C & D. Use the mouse (click and drag) to move the DNA molecule around.
http://www.umass.edu/molvis/tutorials/dna/
1) In tutorial A, how are the hydrogen bonds between the base pairs of the DNA indicated? (two word answer)
2) In tutorial B, how many C-G base pairs are found in the DNA molecule? How many A-T base pairs?
3) In tutorial B click "Replicate." At what end of the DNA molecule does replication begin--5' or 3' (read: "5 prime or 3 prime)?
4) The first three bases reading from the 3' (read: "3 prime") end of either strand of the DNA molecule are GCC. What would these bases be transcribed into if making a piece of mRNA from this DNA?
5) In tutorial C, erase the bases and the H (hydrogen) bonds. (See light blue box at the bottom of the tutorial.) You are left with the phosphates and the sugars. These make up what is known as the _______ of the DNA molecule. (Fill in the blank.) Can you see the double helix? What architectural structure does it remind you of?
6) The two strands in a DNA helix exhibit complementary base pairing. What is complementary base pairing?
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Solution Preview
1) In tutorial A, how are the hydrogen bonds between the base pairs of the DNA indicated? (two word answer)
ANS - silver disk
2) In tutorial B, how many C-G base pairs are found in the DNA molecule? How many A-T base pairs?
ANS - 12 C-G base pairs and 5 A-T base pairs
3) In tutorial B click "Replicate." At ...
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