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TLS Online TPP Program

#Question id: 11010

Which of the following best explains how sympathetic stimulation affects the heart?

#Unit 7. System Physiology – Animal
  1. Permeability of the S-A node to sodium decreases
  2. Permeability of the A-V node to sodium decreases
  3. Permeability of the S-A node to potassium increases
  4. There is an increased rate of upward drift of the resting membrane potential of the S-A node
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TLS Online TPP Program

#Question id: 11305

#Unit 2. Cellular Organization

According to the fluid mosaic model of membrane structure, proteins of the membrane are mostly
TLS Online TPP Program

#Question id: 15985

#Unit 12. Applied Biology

 which of the following phytohormones is enhances the immune system of the plant?
TLS Online TPP Program

#Question id: 3605

#Unit 8. Inheritance Biology

Male Plant blue flower with long pollen was crossed with female plant white flower with long pollen. Analysis of progeny of this cross showed that 50% of the progeny was red with long pollen while the remaining 50% of the progeny was white with long pollen. Which one of the following statements is a possible explanation of the above results?
TLS Online TPP Program

#Question id: 1184

#Unit 4. Cell Communication and Cell Signaling

The order of events in a signaling pathway can be determined by the analysis of mutants. Cells that express a mutant defective Raf protein cannot be stimulated to proliferate uncontrollably by constitutively active RasD (dominant active). This indicates:
TLS Online TPP Program

#Question id: 780

#Unit 1. Molecules and their Interaction Relevant to Biology

Drosha and Pasha: