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प्रश्न
Differentiate between the following:
mRNA and tRNA
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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. |
संबंधित प्रश्न
Depending upon the chemical nature of the template (DNA or RNA) and the nature of nucleic acids synthesised from it (DNA or RNA), list the types of nucleic acid polymerases.
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?
The amino acid attaches to the tRNA at its ______.
In transcription in eukaryotes, heterogeneous nuclear RNA (hnRNA) is transcribed by ______.
In eukaryotes, the process of processing of primary transcript involves ______.
The most abundant type of RNA in the cell is ______.
The most likely method, used to determine the structural details of the cell organelle is ______.
Sigma factor is a component of ______.
Which enzymes are responsible for the synthesis of tRNA?
A ribozyme is an:
The exon part of mRNA has code for ______
Which is the “Only enzyme” that has “Capability” to catalyse Initiation, Elongation and Termination in the process of transcription in prokaryotes?
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.
Given below are two statements:
Statement I: Transfer RNAs and ribosomal RNA do not interact with mRNA.
Statement II: RNA interference (RNAi) takes place in all eukaryotic organisms as a method of cellular defence.
In the light of the above statements, choose the most appropriate answer from the options given below:
In which direction does RNA polymerase move along the template strand during bacterial transcription elongation?
Which nitrogenous base in RNA pairs with adenine during bacterial transcription?
How many DNA strands are read simultaneously by RNA polymerase during bacterial transcription?
Which single enzyme in bacteria synthesizes all types of RNA (mRNA, tRNA, and rRNA)?
