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प्रश्न
Explain in short.
Transcription
उत्तर
- Transcription is the process of synthesis of mRNA from DNA. It takes place in the presence of RNA polymerase.
- During transcription, mRNA is produced as per the sequence of nucleotides present on the DNA.
- This mRNA sequence is always complementary to the DNA strand that is used for its synthesis.
- The thymine in DNA molecule is replaced by uracil in RNA, during the process of transcription.
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संबंधित प्रश्न
Give diagrammatic representation to show a perfect pairing and any ‘two’ Wobble pairings.
Attempt any TWO of the following:
Define the terms ‘codon’ and ‘anticodon’.
Sketch and label the ‘clover leaf model’ of t-RNA.
Very Short Answer Question:
Why the genetic code is considered as commaless?
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.
Enzyme required for peptide formation is
What is the function of RNA primer?
Define Translocation.
Which genetic disorders are caused by mutation?
____________ refers to the mechanism in which codons of mRNA are translated and specific amino acids in a sequence form a polypeptide on ribosomes.
Genetic code consists of ______.
Identify the property of genetic code represented by the following case:
Each codon codes for a particular amino acid.
Match the Column I (RNA polymerases) with Column II (Transcribed products) and select the correct option.
| Column I | Column II | ||
| i. | RNA polymeraseI | a. | t-RNA |
| ii. | RNA polymerase II | b | rRNA |
| iii. | RNA polymerase III | c. | hnRNA |
Select the correct option from the following:
Identify the CORRECT statements.
- Conversion of hnRNA to mRNA - Processing
- Removal of introns and joining of exons - Splicing
- Methyl adenosine triphosphate is added to 5'-end of hnRNA- Capping
- Addition of adenylate residues to 5' end in a template-dependent manner - Tailing
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.
Answer the following questions :
What is transcription?
Describe the process of transcription.
What is meant by the polarity of genetic code ?
