Q. No.Which of the following is not a feature of the double helix model of DNA?
1.
The two chains have anti-parallel polarity
2.
A purine always comes opposite to a pyrimidine
3.
The pitch of the DNA is 3.4 nm
4.
The two chains are coiled in a left handed fashion
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Gene regulation in prokaryotes is carried out exclusively at the level of:
| 1. | Initiation of transcription |
| 2. | Post-transcriptional modifications |
| 3. | Translation |
| 4. | Post-translational modifications |
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The lac operon is regarded as:
| 1. | Negative, Inducible | 2. | Negative, Repressible |
| 3. | Positive, Inducible | 4. | Positive, Repressible |
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In RNA splicing:
| 1. | Exons are removed and introns are joined together |
| 2. | Introns are removed and exons are joined together |
| 3. | Cistrons are removed and introns are joined together |
| 4. | Introns are removed and Cistrons are joined together |
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In most prokaryotes, the transcription unit is:
| 1. | Mono-cistronic | 2. | Poly-cistronic |
| 3. | Multi-cistronic | 4. | Uni-cistronic |
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Identifying all the genes in the genome that are transcribed into RNA is called:
| 1. | Expressed Sequence Tag | 2. | Sequence Annotation |
| 3. | Inverse PCR | 4. | Retrotransposition |
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The last of 24 human chromosomes to be sequenced was:
1. Chromosome 1 and completed in 2003
2. Chromosome 1 and completed in 2006
3. Chromosome X and completed in 2003
4. Chromosome X and completed in 2006
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Which of the following is not a feature of the human genome?
| 1. | The human genome contains 3164.7 million nucleotide bases. |
| 2. | The largest human gene of dystrophin has about 2.4 million bases. |
| 3. | The total number of genes in the human genome is much higher than the previous estimates. |
| 4. | Less than 2 % of the genome codes for proteins. |
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Which human chromosome has maximum and minimum genes located on it respectively?
1. X and 1
2. X and Y
3. Y and 1
4. 1 and Y
SNPs in human genome are located at about:
1. 1.4 million locations
2. 1.7 million locations
3. 2.1 million locations
4. 2.4 million locations
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