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TLS Online TPP Program

#Question id: 11484

Two students studying physiology taste a known "bitter" substance, and both report sensing bitterness. They then sample another substance. Student A reports sensing both a bitter taste and a salty taste, but student B reports only a salty taste. What is the most logical explanation?

#Unit 7. System Physiology – Animal
  1. Student A had an allergic reaction to the food, causing him to perceive the food as being bitter.
  2. Student A has normal "bitter" taste buds; student B has defective "bitter" taste buds that result in lower sensitivity to bitterness.

  3. Student A has a protein receptor capable of detecting a bitter molecule found in that substance, whereas student B lacks that particular protein receptor.

  4. Student A has normal saliva, whereas student B's saliva is more alkaline than normal.
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TLS Online TPP Program

#Question id: 12108

#Unit 10. Ecological Principles

Resource partitioning would be most likely to occur between
TLS Online TPP Program

#Question id: 1523

#Unit 4. Cell Communication and Cell Signaling

Following statements are regarding to the apoptosis which is induced by trophic factors.

A. The presence of specific trophic factors (e.g., NGF) leads to activation of their cognate receptor tyrosine kinases (e.g., TrkA) and activation of the PKB pathway.

B. DNA damage or ultraviolet irradiation leads to induction of synthesis of the BH3-only Puma protein. Puma binds to Bak and Bax as well as to Bcl-2, allowing Bak and Bax to form oligomeric pores.

C. Removal of a cell from its substratum disrupts integrin signaling, leading to release of the BH3-only Bim protein from the cytoskeleton.

D. Binding of extracellular death signals, such as tumor necrosis factor and Fas ligand, to their receptors oligomerizes an associated protein (FADD), which in turn triggers the caspase cascade, leading to cell murder by apoptosis.

Which of the following pathway does not belong to the trophic factor inducing apoptotic pathway?
TLS Online TPP Program

#Question id: 5261

#Unit 8. Inheritance Biology

Which of these statements about prokaryotes is correct?
TLS Online TPP Program

#Question id: 12068

#Unit 7. System Physiology – Animal

Prolonged changes in neuronal activity are usually achieved through the activation of
TLS Online TPP Program

#Question id: 11659

#Unit 10. Ecological Principles

Which of the following steps are involved in stabilization of successful community?