Q. No.The size of VNTR [used in DNA fingerprinting] varies from:
1. 0.1 to 20 kb 2. 20 to 30 kb 3. 50 to 100 kb 4. 115 to 215 kb
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The predominant site for control of gene expression in prokaryotes is:
1. Transcription initiation
2. Binding of mRNA to ribosome
3. Translation termination
4. Post translational modification
What is incorrect regarding the salient features of the DNA double helix?
1. The two chains have anti-parallel polarity
2. The base pairing is complementary
3. Backbone of a strand is constituted by sugar-phosphate
4. The pitch is 0.34 nm
During translation, formation of peptide bonds in bacteria is catalyzed by:
1. Polynucleotide phosphorylase
2. Protease
3. Ligase
4. Ribozyme
In eukaryotes, RNA polymerase II transcribes:
1. heterogenous nuclear RNA
2. small nuclear RNA
3. transfer RNA
4. ribosomal RNA
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
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 |
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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 |
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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 |
In the history of biology, the human genome project led to the development of:
1. Biosystematics
2. Biotechnology
3. Biomonitoring
4. Bioinformatics
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