c. Draw below a G-C base pair and be sure to label the 5 carbons of the sugar ri

Question

c. Draw below a G-C base pair and be sure to label the 5 carbons of the sugar ring 1’, 2’, 3’ …and so on.

2. A macromolecule isolated from an extraterrestrial source superficially resembles DNA, but closer analysis shows that the bases have different chemical structures. These bases W, V, W, Y have replaced A, T, G, and C.

a.) Could these DNA molecules have been derived from a living organism with principles of genetic inheritance that is similar to Earthly organisms?

b.)Which are like purines and which are like pyrimidines?

c.) Based on potential for H-bonding could any of these bases replace the terrestrial bases A T C G in organisms on Earth? (Use the clear films and the sketches of the bases on the white board in class). Explain your answer.

Explanation / Answer

Q2 part a) yes these DNA could be derived from a living organism using earthlike principles of genetic inheritance that is similar to earthly organisms.

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