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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
What is 'RNA'?
Multiple Choice Question:
Translation occurs in the _______.
Describe the process of transcription in protein synthesis.
In which of the following synthesis of DNA strand is not involved directly?
Enzyme required for peptide formation is
Which process is shown in the following diagram?
Define mutation.
Read the following statements and select the correct option.
- Structural genes in eukaryotes have interrupted non-coding sequences known as exons.
- The coding sequences or express sequences are defined as introns.
____________ refers to the mechanism in which codons of mRNA are translated and specific amino acids in a sequence form a polypeptide on ribosomes.
The enzyme ______ forms the peptide bond between amino acid on the first initiator t-RNA at P-site and amino acid on t-RNA at A-site.
______ does not play any role in termination and release of a polypeptide chain.
During translation, ______ ions play significant role in associating two subunits of ribosomes.
____________ is the initiation codon.
Sequential order of nucleotides on template strand forming m-RNA synthesizing specific protein is given below. Based on it select the sequential t-RNA anticodon entering in the process of protein synthesis.
Template: TAC GAC AAC CAC TTA ATT
Which one of the following is considered as template strand during transcription:
Which of the following is transcribed and then translated to form a protein product?
Given below is a type of chromosomal mutation. Identify the type of mutation.
Given,
Transcription (eukaryotic) : Nucleus; similarly, Transcription (prokaryotic) : ______ ?
Choose the correct option.
Draw flow chart of Central Dogma.
Name the anticodon of the tRNA that carries the above amino acid.
