TLS Online TPP Program

#Question id: 683


Which factor does not help to explain why many proteins exhibit quaternary structure?

#Unit 1. Structure and Function of Biomolecules
  1. Oligomers are usually more stable than the free monomers.

  2. Active sites can be formed when the protein chains associate.

  3. The subunits always are able to maintain the same three-dimensional structure whether they are associated into an oligomer or not.

  4. Increased efficiency by the sharing of the same subunit with the same function among different proteins.

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TLS Online TPP Program

#Question id: 30073

#Unit 7. System Physiology – Animal

Following graph represents volume and pressure in ventricles. According to graph which of the following events correctly represents A & B  respectively?


TLS Online TPP Program

#Question id: 31305

#Unit 7. System Physiology – Animal

What is the membrane potential (threshold level) at which the S-A node discharges?

TLS Online TPP Program

#Question id: 31415

#Unit 7. System Physiology – Animal

A woman taking atropine for a gastrointestinal disorder notices that her pupils are dilated. This occurs because atropine blocks __________ receptors on the __________ muscle of the iris.

TLS Online TPP Program

#Question id: 10877

#Unit 7. System Physiology – Animal

A 27-year-old man is breathing quietly. He then inhales as much air as possible and exhales as much air as he can, producing the spirogram shown in the previous figure. What is his expiratory reserve volume (in liters)? 


TLS Online TPP Program

#Question id: 10878

#Unit 7. System Physiology – Animal

The resistance of the pulmonary tree is so low that a 1 cm of water pressure gradient is sufficient to cause normal air flow during resting conditions. Which of the following often has a substantial resistance during pulmonary disease states that can limit alveolar ventilation?

TLS Online TPP Program

#Question id: 10879

#Unit 7. System Physiology – Animal

If the inspiratory reserve volume is 3000 mL, the tidal volume is 500 mL, the expiratory reserve volume is 1000 mL, and the residual volume is 1000 mL, what is the vital capacity?