mRNA is ______ stranded.

mRNA is ______ stranded.

• A. Single
• B. Double
• C. Triple
• D. Circular

Answer: (A)

mRNA is single-stranded. During transcription, a single RNA strand is produced from the DNA template, giving a linear chain that carries the genetic message to the ribosome. Although mRNA can bend back on itself and form internal base-pairing to create hairpins or other secondary structures, it remains one continuous strand rather than a duplex of two separate RNA molecules. Double-stranded RNA is seen in some viruses and in RNA duplex regions, but not in the typical form used for translation. Circular RNAs exist in nature, but standard mRNA used for protein synthesis is linear and single-stranded.

mRNA is single-stranded. During transcription, a single RNA strand is produced from the DNA template, giving a linear chain that carries the genetic message to the ribosome. Although mRNA can bend back on itself and form internal base-pairing to create hairpins or other secondary structures, it remains one continuous strand rather than a duplex of two separate RNA molecules. Double-stranded RNA is seen in some viruses and in RNA duplex regions, but not in the typical form used for translation. Circular RNAs exist in nature, but standard mRNA used for protein synthesis is linear and single-stranded.