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Q. No.The synthesis of RNA that has the sequence of codes for polypeptide (i.e., a component of haemoglobin), is catalysed by:
1. Primase
2. RNA polymerase III
3. RNA polymerase I
4. RNA polymerase II
Subtopic: Transcription |
55%
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Which of the following statements is true regarding ribozyme?
| 1. | It is a molecule that catalyses the association of two units of a ribosome |
| 2. | It is an enzyme that synthesizes RNA |
| 3. | It is a polymer of ribonucleotides |
| 4. | It is an enzyme using RNA as substrate |
Subtopic: Transcription |
From NCERT
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In eukaryotes, the RNA that has both unwanted base sequence alternated with useful base sequence is synthesized by:
1. Sigma (\(\sigma \)) factor
2. RNA polymerase II
3. Rho (\(\rho\)) factor
4. RNA primase
1. Sigma (\(\sigma \)) factor
2. RNA polymerase II
3. Rho (\(\rho\)) factor
4. RNA primase
Subtopic: Transcription |
67%
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A transcription unit is 7000 nucleotides long. This unit may use A nucleotides to make a polypeptide that can have B amino acids.
Select the correct option to fill in the blanks A and B.
A B
1. 3500 1750
2. 7000 2330
3. 2100 650
4. 1400 500
Select the correct option to fill in the blanks A and B.
A B
1. 3500 1750
2. 7000 2330
3. 2100 650
4. 1400 500
Subtopic: Translation |
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How many different amino acids would be there in the polypeptide translated from the translation unit of given stretch of mRNA?
1. Three
2. Two
3. Five
4. Four
1. Three
2. Two
3. Five
4. Four
Subtopic: Translation |
From NCERT
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Mutation in which of the following parts of a gene will impact most to the activity of a cell?
1. UTR before start codon
2. UTR after stop codon
3. Exon
4. Intron
1. UTR before start codon
2. UTR after stop codon
3. Exon
4. Intron
Subtopic: Transcription |
74%
From NCERT
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In reverse central dogma of molecular biology, the enzyme reverse transcriptase facilitates:
1. Replication of DNA
2. Synthesis of DNA over RNA template
3. Translation of mRNA into proteins
4. Synthesis of RNA from DNA
1. Replication of DNA
2. Synthesis of DNA over RNA template
3. Translation of mRNA into proteins
4. Synthesis of RNA from DNA
Subtopic: DNA Double Helix |
77%
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During post transcriptional modification of hnRNA, the introns are removed by a complex substance. This complex has:
1. RNA and Protein
2. DNA and RNA
3. Ribozyme and protein
4. RNA polymerase and DNA polymerase
1. RNA and Protein
2. DNA and RNA
3. Ribozyme and protein
4. RNA polymerase and DNA polymerase
Subtopic: Transcription |
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A particular triplet of bases in the coding strand of DNA is 3' A C T 5'. The anticodon on the tRNA that will bind to the mRNA correspond to this codon will be:
1. 5' U G A 3'
2. 5' U C A 3'
3. 5' A G U 3'
4. 5' A C U 3'
1. 5' U G A 3'
2. 5' U C A 3'
3. 5' A G U 3'
4. 5' A C U 3'
Subtopic: Translation | Genetic Code | Transcription |
74%
From NCERT
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The structural genes in lac operon is responsible for all, except:
| 1. | Synthesis of repressor protein |
| 2. | Formation of product that increase the permeability of the cell to \(\beta\)-galactosides |
| 3. | Synthesis of enzyme that transfers acetyl group to \(\beta\)-galactosides |
| 4. | Synthesis of enzyme that hyrolyses lactose |
Subtopic: Gene Regulation: Lac Operon |
65%
From NCERT
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