Which of the following is not a salient feature of the human genome?
1.
Less than 2 percent of the genome codes for proteins
2.
Chromosome 1 has most genes [2968] and the Y has the fewest [231]
3.
The function of almost all the discovered genes is known
4.
Repeated sequences make up a very large portion of human genome
| (a) | Euchromatin is loosely packed chromatin. |
| (b) | Heterochromatin is transcriptionally active. |
| (c) | Histone octomer is wrapped by negatively charged DNA in nucleosome. |
| (d) | Histones are rich in lysine and arginine. |
| (e) | A typical nucleosome contains 400 bp of DNA helix. |
| 1. | (a), (c), (e) only | 2. | (b), (d), (e) only |
| 3. | (a), (c), (d) only | 4. | (b), (e) only |
The process of translation of mRNA to proteins begins as soon as:
| 1. | The tRNA is activated and the larger subunit of ribosome encounters mRNA |
| 2. | The smaller subunit of ribosome encounters mRNA |
| 3. | The larger subunit of ribosome encounters mRNA |
| 4. | Both the subunits join together to bind with mRNA |
DNA polymorphism forms the basis of
1. Translation
2. Genetic mapping
3. DNA finger printing
4. Both genetic mapping and DNA fingerprinting
If a geneticist uses the blind approach for sequencing the whole genome of an organism, followed by assignment of function to different segments, the methodology adopted by him is called as:
1. Bioinformatics
2. Sequence annotation
3. Gene mapping
4. Expressed sequence tags
1. RNA polymerase will bind the promoter region
2. Only z gene will get transcribed
3. z, y, a genes will be transcribed
4. z, y, a genes will not be translated
1.\(6.6 \times 10^{6} \mathrm{bp}\)
2. \(3.3 \times 10^{9} \mathrm{bp}\)
3. \(6.6 \times 10^{9} \mathrm{bp}\)
4. \(3.3 \times 10^{6} \mathrm{bp}\)
| 1. | 80 cells | 2. | 20 cells |
| 3. | 40 cells | 4. | 60 cells |
Which one of the following is not a criterion of genetic material?
| 1. | Should not provide the scope for changes for evolution |
| 2. | Should be able to express itself in the form of Mendelian character |
| 3. | Should be able to generate its replica |
| 4. | Should be stable chemically and structurally |
DNA replication is semi-conservative in nature. This was experimentally proved in eukaryotes by:
1. Hershey and Chase
2. Macleod and McCarty
3. Meselson and Stahl
4. Talyor and his colleagues
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