Q. No.The UTR [untranslated regions] in an mRNA:
1.
Are present only at 5’ end and are not required for efficient translation
2.
Are present only at 3’ end and are not required for efficient translation
3.
Are present at both 5’ and 3’ends and are not required for efficient translation
4.
Are present at both 5’ and 3’ ends and are required for an efficient translation process
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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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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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Satellite DNA:
1. Form a small portion of the human genome
2. Code for proteins that are essential for survival
3. Code for proteins that are not essential for survival
4. Show a high degree of polymorphism
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The technique of DNA fingerprinting was developed initially by:
| 1. | Alfred Sturtevant | 2. | Alec Jeffrys |
| 3. | Thomas Cech | 4. | Fire and Mello |
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