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TLS Online TPP Program

#Question id: 4994

In certain motile prokaryotes, dozens of different proteins comprise the motor that powers the prokaryotic flagellum. The motor has a complicated structure, and its various proteins interact to carry out its function. Based on Darwinʹs explanation for the existence of human eyes, how would he probably have explained the existence of such motors?

#Unit 11. Evolution and Behavior

  1. Because he could not have explained their existence, he would have used supernatural agents as a temporary explanation until the gap in scientific knowledge had been filled.

  2. Because he could not have explained their existence, he would have concluded that the human brain has not (and probably cannot) evolve the capability to solve such complex problems.

  3. He would have proposed that these motors were the products of aliens, and had been delivered to Earth by extraterrestrial visitors.

  4. He would have proposed that less complicated, but still functional, versions (maybe even with a different function) had existed in ancestral prokaryotes.

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TLS Online TPP Program

#Question id: 11254

#Unit 10. Ecological Principles

Character displacement:
TLS Online TPP Program

#Question id: 32710

#Unit 1. Molecules and their Interaction Relevant to Biology

The relationship between activation energy and the rate constant of the reaction, k, is given by the 
TLS Online TPP Program

#Question id: 24509

#Unit 10. Ecological Principles

Polyphagous parasites, usually complete their life cycle in two or more different host species and they also exhibit sexual reproduction . These types of host are,
TLS Online TPP Program

#Question id: 1262

#Unit 4. Cell Communication and Cell Signaling

Although MAP kinase is often activated in multicellular animals by RTKs or cytokine receptors, signaling from other receptors can activate MAP kinase in other eukaryotic cells. we consider the mating pathway in the yeast S. cerevisiae, a well-studied example of a MAP kinase cascade linked to G protein–coupled receptors (GPCRs). Which of the following statement is incorrect?
TLS Online TPP Program

#Question id: 1638

#Unit 4. Cell Communication and Cell Signaling

Intracellular parasites within macrophages are killed more readily in the presence of: