Given the structure below, please answer the following questions. Is the accompa

Question

Given the structure below, please answer the following questions. Is the accompanying figure DNA or RNA? _____ Is the arrow closest to the 5' or 3' end?_____ Spleen diesterase ease is an enzyme that breaks the covalent bond that connects the phosphate to the 5' or carbon. Assume that the dinucleotide is digested with spleen diesterase. To which base (A or T) and to which carbon on the sugar is the phosphate now attached? DNA; 3' end, T, 5' RNA; 3' end; A, 3' DNA; 5' end, A, 5' DNA; 3' end; A, 3' RNA; 3' end; T, 3'

Explanation / Answer

Answer:

40. a. It is DNA because it contains the base thymine. RNA replaces thymine with uracil.

b. The arrow is closest to the 3' end since it is pointing towards the 3' carbon.

c. The phosphate group will now be attached to the base A at the 3'.

The enzyme spleen diesterase cleaves DNA at the covalent bond connecting the 5' carbon of the sugar to the phosphate.

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