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प्रश्न
Explain the structure and function of different types of RNA.
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उत्तर
- mRNA (messenger RNA)-
- single-stranded
- carries a copy of instructions to carry out amino acid assembling &protein synthesis
- unstable
- 5% of total RNA
- In Prokaryotes – it is (polycistronic carrying coding sequence for many polypeptides
- Eukaryotes – (monocistronic) contain information for only one polypeptide.
Messenger RNA (mRNA)
-
tRNA (transfer RNA)-
- single-stranded clover-shaped with 4 arms highly folded -3 D structure
- translates the code from mRNA and transfers amino acid to ribosomes (to built proteins)
- unstable (also known as soluble RNA)
- 15% of total RNA.
Transfer RNA (tRNA)
-
rRNA (ribosomal RNA)-
- single-stranded
- make up the 2 subunits of ribosomes
- metabolically stable
- 80% total RNA
- A polymer with varied length from 120 – 3000 nucleotides & give ribosomes their shape
- Genes of rRNA employed for phylogenetic studies.
Ribosomal RNA (rRNA)
संबंधित प्रश्न
The following statement applies to DNA only, some to RNA only, and some to both. Label them accordingly.
The polynucleotide is double stranded. (_______)
Define the following term.
nucleoside
Identify the INCORRECT match.
DNA consists of two complementary nucleotide chains. If the sequence of nucleotide in one of the chains is 5' AGCTTCGA3', then the nucleotide sequence in the other chain shall be ______.
Which of the following is not present in DNA?
What is the number of \[\begin{array}{cc}\\\backslash\phantom{.......}\\\phantom{}\ce{C = O}\\/\phantom{........}\end{array}\] groups present in nitrogen bases of nucleic acids, thymine and uracil respectively?
The correct statement regarding RNA and DNA respectively is ____________.
Which of the following are substituted purines?
Refer to the given figure.
Select the option which correctly identifies.
Which of the following statements are correct?
- In animals, the causative agent of foot and mouth disease in single stranded RNA Aphthovirus.
-
In animals foot and mouth disease spreads by direct or indirect contact.
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Anthrax is a disease of domestic animals caused by Bacillus anthracis.
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Rinderpest is a contagious bacterial disease of cattle.
