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प्रश्न
Describe the process of transcription.
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उत्तर
- During transcription, information of only one strand of DNA is copied into RNA.
- DNA transcription takes place in nucleus in eukaryotes whereas translation occurs in cytoplasm.
- The promotor is located towards 5’ end of structural gene.
- DNA dependent RNA polymerase catalyses polymerisation in 5’→3’ direction. So the DNA strand having 3’→5’ polarity acts as template strand. The other strand of DNA having 5’→3’ polarity is complementary to template strand.
- The information on this strand of DNA is copied on mRNA.
- The terminator is located at 3’ end of coding strand i.e. downstream. It defines the end of the transcription process.
- As the mRNA grows, the transcribed region of DNA molecule becomes spirally coiled and attains (regains) double helical form.
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संबंधित प्रश्न
Long Answer Question:
Justify the statement. If the answer is false, change the underlined word(s) to make the statement true
The DNA molecule is double-stranded and the RNA molecule is single-stranded.
Changes in the nucleotide of gene : Mutation : : Changes in the place of ribosome : __________
In mRNA strand having specific number of codons, if the 23rd codon UUA is replaced by UAA, what will be the change found in synthesized polypeptide chain?
Identify the process that occurs inside the nucleus during protein synthesis in eukaryotic cells.
Number of amino acids in a polypeptide chain is 150. The number of mRNA bases required is ____________.
Identify the property of genetic code represented by the following case:
Each codon codes for a particular amino acid.
Identify the process represented in the diagram given below.
The enzyme initiating the formation of mRNA is ______
Teminism is:
Select the correct option regarding the statements given below.
Statement I: In the process of transcription, the entire length of DNA is copied into RNA.
Statement II: Copying of DNA to RNA in transcription is based on complementarity base pairing.
