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प्रश्न
Describe the process of transcription.
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
Explain the process of translation.
Sketch and label the ‘clover leaf model’ of t-RNA.
Long Answer Question:
Describe the process of translation in protein synthesis.
Identify the strand of DNA which acts as a template during transcription.
From the following identify the features of "Genetic code".
(i) It is a triplet or three letter code.
(ii) The code is overlapping.
(iii) The code is commaless.
(iv) The genetic code was deciphered by Watson and Crick.
What will be the codon sequence on mRNA formed on template strand if the codon sequence on coding strand of transcription unit is ATG GTG AGC TAC GCG?
A mature mRNA consists of 900 bases without any stop codon in between. What would be the number of amino acids coded by this mRNA during translation?
In a eukaryotic transcription and translation take place ______.
Select the correct statement from the following.
Given below is a type of chromosomal mutation. Identify the type of mutation.
