Q. No.Some amino acids are coded by more than one codon. Hence genetic code is:
1.
Unambiguous
2.
Non-specific
3.
Degenerate
4.
Universal
The length of DNA in a typical mammalian cell is approximately:
| 1. | 1.1 meter | 2. | 1.5 meter |
| 3. | 2.2 meter | 4. | 3.3 meter |
A very low level of expression of the lac operon has to be present in the cell:
| 1. | When lactose is present | 2. | When lactose is absent |
| 3. | When glucose is absent | 4. | All the time |
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 |
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 |
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 |
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
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
Southern blotting is transfer to nitrocellulose sheet from agar gel of:
| 1. | RNA | 2. | Proteins |
| 3. | DNA | 4. | Lipids |
In eukaryotes, RNA polymerase III transcribes:
| 1. | hnRNA, snRNAs and 5.8S RNA |
| 2. | tRNA, 5.8S RNA and snRNAs |
| 3. | tRNA, 5SrRNA and snRNAs |
| 4. | rRNAs – 28S, 18S and 5S |
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