You obtain a sample of double-stranded DNA and transcribe mRNA from this DNA. You then analyze the base composition of each on the two DNA strands and the one mRNA strand, and get the following results. The numbers indicate percentage of each base in the strand:| | A | G | C | T | U ||--------|-----|-----|-----|-----|-----|| strand 1 | 40.1 | 28.9 | 9.9 | 0.0 | 21.1 || strand 2 | 21.5 | 9.5 | 29.9 | 39.1 | 0.0 || strand 3 | 40.0 | 29.0 | 9.7 | 21.3 | 0.0 |**Which one is the template strand for the mRNA?**a. strand 1 b. strand 2 c. strand 3 d. none, since no mRNA is present **Explanation:**- Strand 1 contains uracil (U), suggesting it is the mRNA strand.- Strand 2 and Strand 3 contain thymine (T) but no uracil, indicating they are likely the DNA strands.- Typically, the template strand for mRNA synthesis is complementary to the mRNA strand, so one needs to look at the absence of base pairing between uracil in mRNA and adenine in the DNA strand. Option b, strand 2, is most likely the template strand, as it shows adenine and thymine consistent with a reverse complement relationship to the mRNA strand’s uracil and adenine percentages.

Name: You obtain a sample of double-stranded DNA and transcribe mRNA from t
Uploaded: 2024-03-20T06:42:41.000Z
Channel: Bartleby
Description: You obtain a sample of double-stranded DNA and transcribe mRNA from this DNA. You then analyze the base composition of each on the two DNA strands and the one mRNA strand, and get the following results. The numbers indicate percentage of each base i

mRNA stands for "messenger RNA." The nucleus uses the nucleotide sequence of DNA as a template to make mRNA. This process requires nucleotide triphosphates as substrates and is catalysed by the enzyme RNA polymerase II. The process of making mRNA from DNA is called transcription, and it occurs in the nucleus.Strand 1 is the template strand for mRNA as it has zero thymine bases. As in RNA , in place of thymine , uracil is present. In their two strands uracil is zero so, both of them don't work for mRNA. So, option A is correct which is strand 1.