Practice free NEET NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
During the purification process for recombinant DNA technology, addition of chilled ethanol precipitates out:
Chilled ethanol selectively precipitates DNA as fine threads.
In gene gun method used to introduce alien DNA into host cells, microparticles of _____ metal are used.
Biolistic gun uses tungsten or gold microparticles coated with DNA.
The historic Convention on Biological Diversity, 'The Earth Summit' was held in Rio de Janeiro in the year:
CBD adopted at the Rio Earth Summit, 1992.
In angiosperm, the haploid, diploid and triploid structures of a fertilized embryo sac sequentially are:
Synergids (n) — Zygote (2n) — PEN (3n). Sequence: haploid, diploid, triploid.
Upon exposure to UV radiation, DNA stained with ethidium bromide will show:
EtBr-stained DNA fluoresces bright orange under UV.
Family Fabaceae differs from Solanaceae and Liliaceae. With respect to the stamens, pick out the characteristics specific to family Fabaceae but not found in Solanaceae or Liliaceae.
Fabaceae has diadelphous (9+1) stamens with dithecous anthers.
Which hormone promotes internode/petiole elongation in deep water rice?
Gibberellin (GA₃) promotes internode elongation in submerged deepwater rice.
Frequency of recombination between gene pairs on same chromosome as a measure of the distance between genes to map their position on chromosome, was used for the first time by:
Sturtevant (Morgan's student) constructed the first genetic linkage map.
Identify the pair of heterosporous pteridophytes among the following:
Selaginella and Salvinia are heterosporous; the others are homosporous.
What is the role of RNA polymerase III in the process of transcription in Eukaryotes?
RNA Pol I → large rRNAs, Pol II → hnRNA/mRNA, Pol III → tRNA + 5S rRNA + snRNAs.
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