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 |
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 |
In eukaryotic cell transcription, RNA splicing and RNA capping take place inside the:
1. Nucleus
2. Dictyosomes
3. ER
4. Ribosomes
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 |
Which one of the following statements about the particular entity is true:
1. | The gene for producing insulin is present in every body cell |
2. | Nucleosome is formed of nucleotides |
3. | DNA consists of a core of eight histones |
4. | Centromere is found in animals cells, which produces aster during cell division |
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 |
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 |
Read the following four statements (A-D):
A. | In transcription, adenosine pairs with uracil |
B. | Regulation of lac operon by a repressor is referred to as positive regulation |
C. | The human genome has approximately 50,000 genes |
D. | Haemophilia is a sex-linked recessive disease |
How many of the above statements are right?
1. Three
2. Four
3. One
4. Two