Question

Which of the following RNAs is not required for the synthesis of protein?

• A. siRNA
• B. tRNA
• C. rRNA
• D. mRNA

Answer 1

The correct option is A

siRNA

The correct option is A.

Explanation for the correct option:

1. Double-stranded RNA makes up the non-coding siRNA molecule.
2. Short interfering RNA and silencing RNA are other names for it. Similar to microRNA, it has a brief, well-defined structure that is generally between 20 and 24 base pairs or so (miRNA). Their structure has phosphorylation at both the 3' and 5' ends.
3. siRNAs are highly selective and often produced to prevent some messenger RNAs (mRNAs) from being translated (mRNAs).
4. This reduces the number of particular proteins produced
5. They are produced by the translation, size-cutting, and release into the cytoplasm of double-stranded RNA.

Explanation for the incorrect options:

Option B:

1. A messenger RNA (mRNA) sequence is translated into a protein with the assistance of a kind of RNA molecule known as transfer ribonucleic acid (tRNA).
2. tRNA is necessary for the synthesis of proteins. Transfer RNA serves as a connection between the messenger RNA (mRNA) molecule and the growing chain of amino acids that make up a protein (or adapter).

Option C:

1. Ribosomal RNA (rRNA), a molecule in cells that are exported to the cytoplasm and is a component of the protein-producing organelle known as a ribosome, aids in the conversion of messenger RNA (mRNA) into protein.
2. The catalytic stages of protein synthesis—the joining of amino acids to form a protein molecule—are governed by the rRNA molecules within the ribosome. To represent this role, rRNA is frequently referred to as a ribozyme or catalytic RNA.

Option D:

1. Messenger RNA (mRNA) is a cellular component that transports instructions from DNA in the nucleus to the cytoplasmic locations where proteins are synthesized (the ribosomes).
2. With each sequence of three nitrogen-containing bases in the mRNA indicating the inclusion of a specific amino acid inside the protein, each mRNA molecule encodes the information for one protein (or several proteins in bacteria). The mRNA molecules are transported into the cytoplasm by the nuclear envelope and translated by the rRNA there.

Final answer: RNA that is not required for the synthesis of protein is siRNA.