Destroyer- BIO question 136

[IO1324]

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Hey I was wondering if someone could explain this problem to me.

Consider 5' AAT CGA CCT 3'. This deoxy ribonucleotide polymer could form a double stranded structure with which of the following choices?

a 5' TTA GCT GGA 3'
b 5' TTA GCU GGU 3'
c 5' AGG TCG AUU 3'
d 5' AGG TCG ATT 3'

The book says the answer is D. I can see with its not B or C because that is RNA. But I just cant understand why the answer isn't A. If someone can explain this to me it would be great. Thanks.

1324

 

[tendram]

DNA strands run antiparallel and thus the new strand would be 3' TTA GCT GGA 5', or 5' AGG TCG ATT 3' which is D. Hope that helps 👍

 

[IO1324]

DNA strands run antiparallel and thus the new strand would be 3' TTA GCT GGA 5', or 5' AGG TCG ATT 3' which is D. Hope that helps 👍

👍 Thanks, that clears it up.

 

[jntm46]

Also, since its a DNA strand, A pairs with only T, not U (only pair up when its an RNA strand)