DNA and RNA question

Question

In a process known as transcription, DNA instructions are rewritten into RNA language. If a portion of DNA has the sequence - ATTGAC, what would be the corresponding RNA sequence? Explain.

Answer 1

Now Edwin W.,

Now that you know the "base"ics of coding DNA and RNA, can you answer the larger question: why are the base choices similar, and why is one of them "different"? That can help you answer the further question, which came first evolutionarily, RNA or DNA?

Some other associated questions: are there any organisms or organelles in which other codon-to-amino_acid synthesis instruction sets prevail? If you dig, you'll find that there are!

And how about, the reading-frame direction on DNA, is that ever violated, and could any life-form possess a palindromic storage memory molecule to make that a moot issue?

-- Cheers, --Mr. d.

Answer 2

RNA has the bases of cytosine (C), guanine (G), adenine (A), and uracil (U). They will pair up based on the following:

C-G

A-U

DNA has the bases of cytosine (C), guanine (G), adenine (A), and thymine (T). They will pair up based on the following:

C-G

A-T

During transcription, DNA gets converted to RNA simply by using complementary base pairing. Remember, during transcription, all thymine's will be replaced with uracil's.

The questions asks you to transcribe the DNA sequence ATTGAC. We will go one by one.

A- U (we are in RNA, so remember uracil will pair with adenine).

T- A

T-A

G-C

A-U

C-G

Thus, we have the sequence UAACUG.