The genetic code is:
1.
triplet, degenerate, nearly universal and read in a contiguous fashion
2.
triplet, degenerate, nearly universal and read in an overlapping fashion
3.
doublet, degenerate, nearly universal and read in a contiguous fashion
4.
triplet, ambiguous, totally universal and read in a contiguous fashion
Subtopic: Â Genetic Code |
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Level 1: 80%+
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Consider the given statements:
| I: | Griffith discovered the process of bacterial transformation. |
| II: | Hershey and Chase unequivocally proved that DNA is the genetic material. |
| III: | Meselson and Stahl showed that DNA replicated semi-conservatively. |
| 1. | Only I and II are correct |
| 2. | Only I and III are correct |
| 3. | Only II and III are correct |
| 4. | I, II and III are correct |
Subtopic: Â DNA Replication |Â Search for Genetic Material |
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Level 1: 80%+
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The lac operon can be described as:
| 1. | an inducible operon with a positive regulation by the repressor protein |
| 2. | an inducible operon with a negative regulation by the repressor protein |
| 3. | a repressible operon with a positive regulation by the repressor protein |
| 4. | a repressible operon with a negative regulation by the repressor protein |
Subtopic: Â Gene Regulation: Lac Operon |
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Level 2: 60%+
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Which of the following is not a salient feature of the human genome?
| 1. | Less than 2 percent of the genome codes for proteins |
| 2. | Chromosome 1 has most genes [2968] and the Y has the fewest [231] |
| 3. | The function of almost all the discovered genes is known |
| 4. | Repeated sequences make up a very large portion of human genome |
Subtopic: Â Human Genome Project |
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Level 1: 80%+
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Read the following statements and choose the set of correct statements:
Choose the correct answer from the options given below:
| (a) | Euchromatin is loosely packed chromatin. |
| (b) | Heterochromatin is transcriptionally active. |
| (c) | Histone octomer is wrapped by negatively charged DNA in nucleosome. |
| (d) | Histones are rich in lysine and arginine. |
| (e) | A typical nucleosome contains 400 bp of DNA helix. |
| 1. | (a), (c), (e) only | 2. | (b), (d), (e) only |
| 3. | (a), (c), (d) only | 4. | (b), (e) only |
Subtopic: Â DNA Double Helix |Â DNA Packaging |
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Level 1: 80%+
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The process of translation of mRNA to proteins begins as soon as:
| 1. | The tRNA is activated and the larger subunit of ribosome encounters mRNA |
| 2. | The smaller subunit of ribosome encounters mRNA |
| 3. | The larger subunit of ribosome encounters mRNA |
| 4. | Both the subunits join together to bind with mRNA |
Subtopic: Â Translation |
 67%
Level 2: 60%+
NEET - 2022
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DNA polymorphism forms the basis of
1. Translation
2. Genetic mapping
3. DNA finger printing
4. Both genetic mapping and DNA fingerprinting
Subtopic: Â DNA Fingerprinting |
 72%
Level 2: 60%+
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If a geneticist uses the blind approach for sequencing the whole genome of an organism, followed by assignment of function to different segments, the methodology adopted by him is called as:
1. Bioinformatics
2. Sequence annotation
3. Gene mapping
4. Expressed sequence tags
Subtopic: Â Human Genome Project |
 67%
Level 2: 60%+
NEET - 2022
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In an E.coli strain i gene gets mutated and its product cannot bind the inducer molecule. If growth medium is provided with lactose, what will be the outcome ?
1. RNA polymerase will bind the promoter region
2. Only z gene will get transcribed
3. z, y, a genes will be transcribed
4. z, y, a genes will not be translated
1. RNA polymerase will bind the promoter region
2. Only z gene will get transcribed
3. z, y, a genes will be transcribed
4. z, y, a genes will not be translated
Subtopic: Â Gene Regulation: Lac Operon |
Level 3: 35%-60%
NEET - 2022
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If the length of a DNA molecules is 1.1 metres, what will be the approximate number of base pairs?
1.\(6.6 \times 10^{6} \mathrm{bp}\)
2. \(3.3 \times 10^{9} \mathrm{bp}\)
3. \(6.6 \times 10^{9} \mathrm{bp}\)
4. \(3.3 \times 10^{6} \mathrm{bp}\)
1.\(6.6 \times 10^{6} \mathrm{bp}\)
2. \(3.3 \times 10^{9} \mathrm{bp}\)
3. \(6.6 \times 10^{9} \mathrm{bp}\)
4. \(3.3 \times 10^{6} \mathrm{bp}\)
Subtopic: Â The DNA |
 77%
Level 2: 60%+
NEET - 2022
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