TLS Online TPP Program

#Question id: 5227


One of the characteristics of retrotransposons is that

#Unit 11. Evolution and Behavior
  1. they code for an enzyme that synthesizes DNA using an RNA template.

  2. they are found only in animal cells.

  3. they generally move by a cut-and-paste mechanism.

  4. they contribute a significant portion of the genetic variability seen within a population of gametes.

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TLS Online TPP Program

#Question id: 3523

#Unit 8. Inheritance Biology

If the number of heterozygous pairs involved in a particular cross is three, the phenotype ratio obtained in their F2 generation will be-

TLS Online TPP Program

#Question id: 10908

#Unit 6. System Physiology – Plant

The energy is necessary to move photosynthate from producing cells into the sieve elements. This movement of photosynthate is called

TLS Online TPP Program

#Question id: 23404

#General Aptitude

Farmers use manure in their fields because

TLS Online TPP Program

#Question id: 12251

#Unit 10. Ecological Principles

A plant produces flowers that are open through the day and the night. An experimenter places pollen on the stigmas of freshly opened flowers and covers them after pollination to prevent natural pollinators from having access to the flowers. When experimental pollination was carried out during the day, 40% of the flowers yielded fruit. When experimental pollination was carried out during the night, 80% of the flowers yielded fruit. However, when flowers were  kept  open  to  natural  pollination  during  the  day  (covered  at  night),  35%  of  flowers  produced  fruit.  20%  of flowers exposed to natural pollination during the night (covered during the day) produced fruit. Which of the following statements is NOT a plausible explanation of these results ?

TLS Online TPP Program

#Question id: 13195

#Unit 1. Molecules and their Interaction Relevant to Biology

Who contributes to the stability of DNA helix structure?
A. Hydrogen bonding between bases
B. Hydrogen bonding between water and bases
C. Scattering interactions between bases
D. Stacking interactions between bases
CORRECT combination is