Explore BrainMass
Share

DNA Structure

Please see the attachment.

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?

© BrainMass Inc. brainmass.com August 18, 2018, 7:33 pm ad1c9bdddf

Attachments

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 ...

$2.19