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Multiple Choice
Which of the following serves as a template for the synthesis of messenger RNA (mRNA) during transcription?
A
Transfer RNA (tRNA)
B
Protein
C
Ribosomal RNA (rRNA)
D
DNA
Verified step by step guidance
1
Understand the process of transcription: Transcription is the process by which a segment of DNA is used as a template to synthesize messenger RNA (mRNA). This occurs in the nucleus of eukaryotic cells.
Identify the role of DNA: DNA contains the genetic information in the form of nucleotide sequences. During transcription, a specific region of DNA (a gene) is used as a template to produce a complementary RNA strand.
Recognize the complementary base pairing: During transcription, RNA polymerase reads the DNA template strand and synthesizes mRNA by matching complementary RNA nucleotides. For example, adenine (A) in DNA pairs with uracil (U) in RNA, and cytosine (C) pairs with guanine (G).
Eliminate incorrect options: Transfer RNA (tRNA) and ribosomal RNA (rRNA) are involved in translation, not transcription. Proteins are the end products of gene expression and are not templates for mRNA synthesis.
Conclude that DNA is the correct answer: DNA serves as the template for mRNA synthesis during transcription, as it provides the sequence of nucleotides that determines the mRNA sequence.