DNA to mRNA Transcription:
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Transcription is the process where DNA is copied into mRNA (messenger RNA) by replacing thymine (T) with uracil (U). This is the first step in gene expression where genetic information from DNA is transferred to RNA.
The calculator performs DNA to mRNA transcription:
Where:
Explanation: The process involves creating a complementary RNA strand where adenine (A) pairs with uracil (U), thymine (T) pairs with adenine (A), cytosine (C) pairs with guanine (G), and guanine (G) pairs with cytosine (C).
Details: mRNA transcription is crucial for protein synthesis. The mRNA carries genetic information from DNA to ribosomes where it is translated into proteins, enabling gene expression and cellular function.
Tips: Enter a valid DNA sequence containing only A, T, C, G nucleotides. The sequence is case-insensitive and will be converted to uppercase. Invalid characters will result in an error.
Q1: What is the difference between DNA and mRNA?
A: DNA contains thymine (T) and deoxyribose sugar, while mRNA contains uracil (U) and ribose sugar. mRNA is single-stranded and carries genetic information from DNA to ribosomes.
Q2: Why is thymine replaced with uracil in RNA?
A: Uracil is used in RNA instead of thymine because it's more energetically economical to produce and provides evolutionary advantages in RNA's various functions.
Q3: What is the direction of transcription?
A: Transcription occurs in the 5' to 3' direction, with the mRNA strand being complementary to the DNA template strand.
Q4: Can I transcribe both DNA strands?
A: Typically, only one DNA strand (template strand) is transcribed into mRNA. The other strand (coding strand) has the same sequence as the mRNA except T instead of U.
Q5: What happens after transcription?
A: After transcription, mRNA undergoes processing (capping, polyadenylation, splicing) before being transported to the cytoplasm for translation into proteins.