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Q. No.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
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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Hydrogen bonds between two base pairs can be seen in:
(a) dsDNA
(b) mRNA
(c) tRN
(d) ssDNA
The correct one(s) is/are:
1. All (a), (b), (c) and (d)
2. (a) only
3. (a) and (c) only
4. (a) and (d) only
(a) dsDNA
(b) mRNA
(c) tRN
(d) ssDNA
The correct one(s) is/are:
1. All (a), (b), (c) and (d)
2. (a) only
3. (a) and (c) only
4. (a) and (d) only
Subtopic: DNA Double Helix |
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The process of translation in a bacterium starts:
1. Just after the recognition of promoter site
2. Soon after the transcription begin
3. After the adenylation is completed
4. Soon after the removal of introns
1. Just after the recognition of promoter site
2. Soon after the transcription begin
3. After the adenylation is completed
4. Soon after the removal of introns
Subtopic: Transcription |
69%
From NCERT
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How many genes are present in that chromosome of human being, the sequencing for which was completed in May 2006?
1. 231
2. 2968
3. 4698
4. 112
1. 231
2. 2968
3. 4698
4. 112
Subtopic: Human Genome Project |
86%
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Polymerisation of amino acids to form a polypeptide requires all of the following, except:
1. ATP
2. Polymerase
3. tRNA
4. GTP
1. ATP
2. Polymerase
3. tRNA
4. GTP
Subtopic: Translation |
53%
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The sensitivity of the DNA fingerprinting technique has been increased by the use of:
1. PCR
2. Electrophoresis
3. Blotting
4. SNPs
1. PCR
2. Electrophoresis
3. Blotting
4. SNPs
Subtopic: DNA Fingerprinting |
80%
From NCERT
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If there is mutation in the regulatory gene of lac operon as a result the codon UGA in repressor mRNA is converted to UAG, it would result:
1. No synthesis of repressor protein
2. No change in the normal function of lac operon
3. The synthesis of abnormal repressor protein
4. Irreversible binding of repressor to the promoter
1. No synthesis of repressor protein
2. No change in the normal function of lac operon
3. The synthesis of abnormal repressor protein
4. Irreversible binding of repressor to the promoter
Subtopic: Genetic Code |
55%
From NCERT
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