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प्रश्न
Explain the structure and function of different types of RNA.
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
Give scientific reasons:
On complete hydrolysis DNA gives equimolar quantities of adenine and thymine.
The following statement applies to DNA only, some to RNA only, and some to both. Label them accordingly.
The polynucleotide is double stranded. (_______)
The following statement applies to DNA only, some to RNA only, and some to both. Label them accordingly.
The polynucleotide contains guanine. (_______)
Write the name of the base present in DNA but not found in RNA.
Sugar present in DNA is ___________
______ is a single ring compound.
Pentose sugar present in RNA is ______
______ is NOT a pyrimidine.
Identify the INCORRECT match.
In an experiment, DNA was found to have 31 % adenine and 19% guanine. Identify the percentage of cytosine in the given molecule of DNA.
In which of the following RNA is genetic material?
Nucleotides = ____________.
Nucleotides are linked together through ____________.
If one strand of the DNA has the sequence ‘ATGCTTGA’, then the sequence of complementary strand would be ____________.
Give any three differences between DNA and RNA.
What type of sugar molecule is present is DNA?
Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category against it?
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.
-
Anthrax is a disease of domestic animals caused by Bacillus anthracis.
-
Rinderpest is a contagious bacterial disease of cattle.
