In the process of transcription in Eukaryotes, the RNA polymerase I transcribes-
| 1. | mRNA with additional processing, capping and tailing |
| 2. | tRNA, 5 S rRNA and snRNAs |
| 3. | rRNAs - 28 S, 18 S and 5.8 S |
| 4. | Precursor of mRNA, hnRNA |
What initiation and termination factors are involved in transcription in prokaryotes?
| 1. | σ and ρ , respectively |
| 2. | α and β , respectively |
| 3. | β and γ , respectively |
| 4. | α and σ , respectively |
In Australia, marsupials and placental mammals have evolved to share many similar characteristics. This type of evolution may be referred to as -
1. Adaptive Radiation
2. Divergent Evolution
3. Cyclical Evolution
4. Convergent Evolution
A population of a species invades a new area. Which of the following condition will lead to Adaptive Radiation?
| 1. | Area with large number of habitats having very low food supply. |
| 2. | Area with a single type of vacant |
| 3. | Area with many types of vacant habitats. |
| 4. | Area with many habitats occupied by a large number of species. |
Which of the following statements is correct about the origin and evolution of men ?
1. Agriculture came around 50,000 years back.
2. The Dryopithecus and Ramapithecus primates existing 15 million years ago, walked like men.
3. Homo habilis probably ate meat.
4. Neanderthal men lived in Asia between 100000 and 40000 years back
A biocontrol agent to be a part of an integrated pest management should be
1. species-specific and symbiotic
2. free living and broad spectrum
3. narrow spectrum and symbiotic
4. species-specific and inactive on non-target organisms
Which of the following statements about methanogens is not correct?
| 1. | The can be used to produce biogas, |
| 2. | They are found in the rumen of cattle and their excreta. |
| 3. | They grow aerobically and breakdown cellulose-rich food. |
| 4. | They produce methane gas. |
Among the following pairs of microbes, which pair has both the microbes that can be used as biofertilizers ?
1. Aspergillus and Rhizopus
2. Rhizobium and Rhizopus
3. Cyanobacteria and Rhizobium
4. Aspergillus and Cyanobacteria
Select the incorrect statement regarding inbreeding:
1. Inbreeding helps in elimination of deleterious alleles from the population
2. Inbreeding is necessary to evolve a pure-line in any animal
3. Continued inbreeding reduces fertility and leads to inbreeding depression.
4. Inbreeding depression cannot be overcome by Out-crossing.
Mad cow disease in cattle is caused by an organism which has :
1. Inert crystalline
2. Abnormally folded protein
3. Free RNA without protein coat
4. Free DNA without protein coat
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