Question:
Which of the following is not an RNA?
Which of the following is not an RNA?
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The three major types of RNA are:
m-RNA (Messenger RNA)
t-RNA (Transfer RNA)
r-RNA (Ribosomal RNA)
These together participate in the process of protein synthesis.
Updated On: Jun 26, 2026
- m-RNA
- d-RNA
- t-RNA
- r-RNA
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The Correct Option is B
Solution and Explanation
Step 1: Recall the major types of RNA.
The three principal types of RNA present in cells are: \[ \text{m-RNA} = \text{Messenger RNA} \] \[ \text{t-RNA} = \text{Transfer RNA} \] \[ \text{r-RNA} = \text{Ribosomal RNA} \] These RNAs play important roles in protein synthesis.
Step 2: Understand the function of each RNA.
Messenger RNA (m-RNA) carries genetic information from DNA to ribosomes.
Transfer RNA (t-RNA) transports amino acids to the ribosome during protein synthesis.
Ribosomal RNA (r-RNA) forms the structural and catalytic component of ribosomes.
All three are naturally occurring and biologically important forms of RNA.
Step 3: Examine d-RNA.
The term d-RNA is not recognized as a standard type of RNA in biological systems.
Therefore, it is not one of the major classes of RNA.
Step 4: Final conclusion.
Hence, the option that is not an RNA type is \[ \boxed{\text{d-RNA}} \] Therefore, the correct option is \[ \boxed{(2)} \]
The three principal types of RNA present in cells are: \[ \text{m-RNA} = \text{Messenger RNA} \] \[ \text{t-RNA} = \text{Transfer RNA} \] \[ \text{r-RNA} = \text{Ribosomal RNA} \] These RNAs play important roles in protein synthesis.
Step 2: Understand the function of each RNA.
Messenger RNA (m-RNA) carries genetic information from DNA to ribosomes.
Transfer RNA (t-RNA) transports amino acids to the ribosome during protein synthesis.
Ribosomal RNA (r-RNA) forms the structural and catalytic component of ribosomes.
All three are naturally occurring and biologically important forms of RNA.
Step 3: Examine d-RNA.
The term d-RNA is not recognized as a standard type of RNA in biological systems.
Therefore, it is not one of the major classes of RNA.
Step 4: Final conclusion.
Hence, the option that is not an RNA type is \[ \boxed{\text{d-RNA}} \] Therefore, the correct option is \[ \boxed{(2)} \]
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