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प्रश्न
Differentiate between the following:
mRNA and tRNA
उत्तर
| Sr. No. | mRNA | tRNA |
| 1. | It accounts for around 5% of total RNA in the cell. | It contributes to around 15% of the total RNA in the cell. |
| 2. | It consists of 75-6000 bases. | It consists of between 73-93 bases. |
| 3. | Its molecular weight ranges from 25000 to 2000000 daltons. | Its molecular weight is about 25000 daltons. |
| 4. | The sedimentation coefficient is 6-30S. | Its sedimentation coefficient is 4S. |
| 5. | It is the longest RNA with the highest molecular weight but the least abundant. | It is the smallest RNA and is coiled like a cloverleaf. |
| 6. | It contains the codes that create proteins. | It carries code that is complementary to the RNA code. |
| 7. | It is synthesised by RNA polymerase II in the nucleus. | It is synthesised in the nucleus by RNA polymerase III. |
| 8. | There are no base modifications in the coding region. | Approximately 5% of the bases are changed. |
| 9. | It is classified into numerous categories based on the number of genes. | There are approximately 100 types. |
| 10. | It is short-lived (3 seconds to a few days) and typically degrades following protein synthesis. | It is quite stable, may be used repeatedly, and degrades slowly. |
| 11. | It is known as template/nuclear/messenger or informative RNA because it transports genetic information provided by DNA. | Soluble or adaptor RNA transports amino acids to mRNA during protein synthesis. |
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संबंधित प्रश्न
Explain the process of transcription in Eukaryotes.
Answer the following question.
Construct and label a transcription unit from which the RNA segment given below has been transcribed. Write the complete name of the enzyme that transcribed this RNA.
With regard to mature mRNA in eukaryotes.
Regulatory proteins are the accessory proteins that interact with RNA polymerase and affect its role in transcription. Which of the following statements is correct about regulatory protein?
If the base sequence of a codon in mRNA is 5'-AUG-3', the sequence of tRNA pairing with it must be ______.
The amino acid attaches to the tRNA at its ______.
To initiate translation, the mRNA first binds to ______.
On the ribosome, mRNA binds ______ and two sites in the ______ for subsequent amino acids to bind to be close enough to each other for the formation of a peptide bond.
The most abundant type of RNA in the cell is ______.
Which of the following pair lack the unit membrane?
Which enzymes are responsible for the synthesis of tRNA?
A ribozyme is an:
The exon part of mRNA has code for ______
Refer the given diagram. What does it represent?
What is the role of RNA polymerase III in the process of transcription in eukaryotes?
Identify the correct statement.
What are the functions of poly-A “tail” in a mature on RNA?
Observe the segment of mRNA given below.
(a) Explain and illustrate the steps involved to make fully processed hnRNA?
(b) Gene encoding RNA Polymerase I and III have been affected by mutation in a cell. Explain its impact on the synthesis of a polypeptide, stating the reasons.
