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Home Q & A Board Biology-Related Homework Help Cell Biology
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julie7 julie7
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11 years ago
When RNA is added to a complementary DNA strand, How is Mrna single stranded? If it was added to the DNA strand wouldn't it be double stranded?
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#1
11 years ago
Transcription (or was it...)

only one side has to be copied.
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#2
11 years ago
RNA is single stranded simply because of the nature of the sugar. DNA is a double helix, and it is unwound by an enzyme called DNA helicase. This leaves two strands of the previously double-stranded DNA helix.

One of the strands of DNA is used as a template for the creation of RNA; the strands are not added. The bases of the DNA and RNA strands are complementary; if several of the bases in the DNA sequence were ATCGUGUATUC, the RNA strand would read UAGCACAUAG.

* Uracil (U) is the RNA version of Thyamine (T)
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