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TLS Online TPP Program

#Question id: 11124

A researcher compared the nucleotide sequences of a homologous gene from five different species of mammals with the homologous human gene. The sequence homology between each speciesʹ version of the gene and the human gene is presented as a percentage of similarity.

What probably explains the inclusion of rabbits in this research?

#Unit 9. Diversity of Life Forms
  1. Their short generation time provides a ready source of DNA.
  2. They possess all of the shared derived characters as do the other species listed.
  3. They are the closest known relatives of rhesus monkeys.
  4. They are the outgroup.
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TLS Online TPP Program

#Question id: 26463

#Unit 3. Fundamental Processes

Conversion of CPC-OPC  is affected by mutation in
TLS Online TPP Program

#Question id: 5340

#Unit 8. Inheritance Biology

Which of the following above pedigree show mode of inheritance?
TLS Online TPP Program

#Question id: 12402

#Unit 6. System Physiology – Plant

According to the Cholodny–Went model of phototropism, the tips of grass coleoptiles have specialized functions such as
a) Production of auxin
b) Perception of a unilateral light stimulus
c) Lateral transport of IAA in response to the phototropic stimulus
Which of the following given above functions is correct?
TLS Online TPP Program

#Question id: 12238

#Unit 10. Ecological Principles

The mussel Mytilus edulis thrives in saline habitats, in both the highly salty seawater of tidal zones and the less salty estuaries. This results in two kinds of populations: one adapted to the higher salt concentrations of the tidal zone, and one adapted to the lower salt concentrations of the estuary. It has been found that the more salt-tolerant populations have high frequencies of an allele that produces an enzyme involved in maintaining osmotic equilibrium. Conversely, estuarine mussels having the same enzyme seem to be disfavoured and have a much higher death rate than mussels without the allele. Adult estuarine populations do have lower frequencies of this allele. Each spring, large numbers of larvae from  the salty habitats pour into the estuaries.
The invasion of the seawater larvae would be expected to facilitate change in the genetic structure of the estuarine population by a process called
TLS Online TPP Program

#Question id: 23602

#General Aptitude

P is the mother of K; K is the sister of D; D is the father of J . How is P related to J?