TLS Online TPP Program

#Question id: 28349


After the organization of microtubules, the two mRNA bicoid and oskar complexed with microtubules motor protein in oocyte, which localizes these mRNA, select the correct prediction about oskar mRNA?

#Unit 5. Developmental Biology
  1. It binds to dynein, a minus-directed motor protein moves the mRNA to the posterior end of the egg
  2. It binds to dynein, a minus-directed motor protein moves the mRNA to the anterior end of the egg
  3. it complexed to kinesin I, plus-directed motor protein that moves to the growing end of the microtubules at the posterior region
  4. it complexed to dynein, plus-directed motor protein that moves to the growing end of the microtubules at the anterior region
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TLS Online TPP Program

#Question id: 4768

#Unit 8. Inheritance Biology

A trait that appears to be dominant in one sex but recessive in the other is called:

TLS Online TPP Program

#Question id: 28201

#Unit 5. Developmental Biology

 Which of the following is correct about Instructive interaction? 

TLS Online TPP Program

#Question id: 12960

#Unit 10. Ecological Principles

The Norway rat (Rattus Norvegicus), a widespread pest, was controlled for about a decade by the anticoagulant warfarin. This chemical substance, placed in food pellets, is absorbed by the intestinal tract and inhibits the clotting of blood. After a population decline for about 10 years, rat populations increased and stabilized. In one European population, as illustrated in the graph below, the percentage of rats resistant to warfarin has remained fairly stable over a number of years.

Resistance to warfarin is governed by a dominant autosomal gene, R. More than 15 percent of the resistant animals are heterozygous at this locus (Rr). The table below indicates the response to warfarin and relative reproductive fitness of individuals that are homozygous or heterozygous for the dominant gene (R). The RR individuals have a 20-fold increase in vitamin K requirement over individuals.

Fitness is a measure of the reproductive success of a particular genotype. The highest fitness is 1.00.
Which of the following is most likely correct concerning the gene for resistance to warfarin? 

TLS Online TPP Program

#Question id: 26946

#Unit 10. Ecological Principles

Calculate the finite rate of increase, if ecologists count the number of insects in the population, N0=200, the next year ecologists count 260 insects in the same population?

TLS Online TPP Program

#Question id: 11734

#Unit 6. System Physiology – Plant

Some molecules act as cytokinin antagonists, which are able to block the action of cytokinins that is