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TLS Online TPP Program

#Question id: 2463

 In the operational model for movement of myosin along an actin filament, the power stroke occurs during:

#Unit 2. Cellular Organization

  1. binding of ATP.

  2. hydrolysis of ATP.

  3. release of phosphate (Pi).

  4. release of ADP.

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TLS Online TPP Program

#Question id: 19826

#Unit 12. Applied Biology

 _________are low molecular weight antibiotic polyphenolic or terpenoid compounds produced by plant cells
TLS Online TPP Program

#Question id: 14738

#Unit 4. Cell Communication and Cell Signaling

Choose correct statements about Muscarinic receptors;
a. An acetylcholine analog, In activated condition, these receptors slow the rate of heart muscle contraction.
b .This type of receptor is coupled to a Gαi protein, and ligand binding leads to the opening of an associated K+ channel.
c .The subsequent influx of K+ ions from the cytosol causes an increase in the magnitude of the usual inside-negative potential across the plasma membrane that lasts for several seconds. 
TLS Online TPP Program

#Question id: 10488

#Unit 6. System Physiology – Plant

Blue light activates a proton pump at the guard cell plasma membrane. The relationship between proton pumping at the guard cell plasma membrane and stomatal opening is evident from the observations that;

 a.) Orthovandate inhibits the fusicoccin-stimulated opening

 b.) fusicoccin stimulates both proton extrusion from guard cell protoplasts and stomatal opening

 c.) CCCP inhibits the fusicoccin-stimulated opening

 d.) CCCP, a proton ionophore that makes the plasma membrane highly permeable to protons resulting stomatal opening

 Which one of the following observation from the above statements should  be correct?
TLS Online TPP Program

#Question id: 10213

#Unit 6. System Physiology – Plant

What is the reason behind that an organism cannot live or die in the presence of both light and molecular oxygen?
TLS Online TPP Program

#Question id: 2199

#Unit 2. Cellular Organization

Which of the following is not an example of an ion transporter?