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प्रश्न
Describe the process of transcription.
Explain 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.
संबंधित प्रश्न
Multiple Choice Question:
Which of the following is NOT part of protein synthesis?
Long Answer Question:
Justify the statement. If the answer is false, change the underlined word(s) to make the statement true
The job of mRNA is to pick up amino acids and transport them to the ribosomes.
Long Answer Question:
Justify the statement. If the answer is false, change the underlined word(s) to make the statement true
Transcription must occur before translation may occur.
In which of the following synthesis of DNA strand is not involved directly?
During elongation of polypeptide chain, sigma factor is
What is central dogma of molecular biology?
Define.
Translation
Identify the condition under which there will be no change in the reading frame of following mRNA.
5' AACAGCGGUGCUAUU 3'
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?
Which property of genetic code is specified by the following statement?
The two triplet codons UUU and UUC specify the same amino acid, i.e. phenylalanine.
Using a DNA template, synthesis of a new strand is carried out by which of the following enzyme?
In processing of eukaryotic hnRNA, during protein synthesis what does the tailing of RNA involve?
______ catalyzes polymerization in 5' → 3' direction during transcription.
Which one of the following codons will NOT pair with Anticodon of t-RNA?
Initiation of polypeptide chain in protein synthesis is induced by:
A functional unit of gene, which specific the synthesis of one polypeptide is known as:
Which of the following RNAs is not required for the synthesis of protein?
Which events show the beginning of translocation?
During the post transcriptional modification, ______ process does not occur.
What is meant by the polarity of genetic code ?
