Q. No.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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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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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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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
During transcription, if the nucleotide sequence of the DNA strand that is being coded is ATACG, then the nucleotide sequence in the mRNA would be:
1. TCTGG
2. UAUGC
3. UATGC
4. TATGC
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Jacob and Monad studied lactose metabolism in E.Coli and proposed the Operon concept. The Operon concept is applicable to:
1. All prokaryotes
2. All prokaryotes and some eukaryotes
3. All prokaryotes and all eukaryotes
4. All prokaryotes and some protozoans
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The method of DNA replication in which two strands of DNA separate and synthesize new strands is called:
1. Dispersive
2. Conservative
3. Semiconservative
4. Non-conservative
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In the genetic code dictionary, how many codons are used to code for all the 20 essential amino acids:
1. 20
2. 64
3. 61
4. 60
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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
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