Q. No.In the history of biology, the human genome project led to the development of:
1.
Biosystematics
2.
Biotechnology
3.
Biomonitoring
4.
Bioinformatics
The unequivocal proof of DNA as the genetic material came from the studies on:
| 1. | Bacterial virus | 2. | Bacterium |
| 3. | Fungus | 4. | Viroid |
The 3'-5' phosphodiester linkages inside a polynucleotide chain serve to join:
| 1. | One nucleoside with another nucleoside |
| 2. | One nucleotide with another nucleotide |
| 3. | One nitrogenous base with pentose sugar |
| 4. | One DNA strand with the other DNA strand |
The lac Operon consists of:
| 1. | One regulatory gene and three structural genes |
| 2. | Two regulatory genes and two structural genes |
| 3. | Three regulatory genes and three structure genes |
| 4. | Four regulatory genes only |
In eukaryotic cell transcription, RNA splicing and RNA capping take place inside the:
1. Nucleus
2. Dictyosomes
3. ER
4. Ribosomes
Which one of the following is a wrong statement regarding mutations?
| 1. | Cancer cells commonly show chromosomal aberrations |
| 2. | UV and Gamma rays are mutagens |
| 3. | Change in a single base pair of DNA does not cause mutation |
| 4. | Deletion and insertion of base pairs cause frame-shift mutations |
What is it that forms the basis of DNA Fingerprinting?
| 1. | The relative difference in the DNA occurrence in blood, skin and saliva |
| 2. | The relative amount of DNA in the ridges and grooves of the fingerprints |
| 3. | Satellite DNA occurs as highly repeated short DNA segments |
| 4. | The relative proportions of purines and pyrimidines in DNA |
E. coli cells with a mutated z gene of the lac operon cannot grow in a medium containing only lactose as the source of energy because-
| 1. | They cannot synthesize functional beta-galactosidase |
| 2. | They cannot transport lactose from the medium into the cell |
| 3. | The lac operon is constitutively active in these cells |
| 4. | In the presence of glucose, E. coli cells do not utilize lactose |
Production of a human protein in bacteria by genetic engineering is possible because:
| 1. | Bacterial cells can carry out the RNA splicing reactions |
| 2. | The mechanism of gene regulation is identical in humans and bacteria |
| 3. | The human chromosome can replicate in bacterial cell |
| 4. | The genetic code is universal |
Which of the following exercises control over transcription:
1. Operator
2. Regulator
3. Promoter
4. Recon
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