Identify the incorrect statement:
1.
Transcription and translation can be coupled in prokaryotes
2.
DNA is a better genetic material than RNA
3.
It is the presence of structural gene in a transcription unit that defines the template and coding strands
4.
RNA polymerase III is responsible for transcription of tRNA, 5srRNA and snRNAs
Subtopic: Â Transcription |
 79%
From NCERT
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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 |
 84%
From NCERT
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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 |
 85%
From NCERT
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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 |
 77%
From NCERT
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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 [2969] 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 |
 81%
From NCERT
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Read the following statements and choose the set of correct statements:
Choose the correct answer from the options given below:
1. (a), (c), (e) only
2. (b), (d), (e) only
3. (a), (c), (d) only
4. (b), (e) only
| (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 |
 90%
From NCERT
NEET - 2022
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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%
From NCERT
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%
From NCERT
NEET - 2022
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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%
From NCERT
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 |
From NCERT
NEET - 2022
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