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TLS Online TPP Program

#Question id: 11102

Pulmonary surfactant

#Unit 7. System Physiology – Animal
  1. keeps the alveoli from collapsing by reducing the surface tension.
  2. inflates the alveoli by increasing the surface tension.
  3. keeps the alveoli from collapsing by increasing the surface tension.
  4. increases the rate of gas exchange across the alveoli by the secretion of phospholipids.
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TLS Online TPP Program

#Question id: 10421

#Unit 6. System Physiology – Plant

The red light-induced rotation of the D ring of the chromophore causes the hairpin to become helical, which of the following β-hairpin changes conformation after rotation?
TLS Online TPP Program

#Question id: 5029

#Unit 11. Evolution and Behavior

Which of the following was the least likely factor causing the Cambrian explosion?
TLS Online TPP Program

#Question id: 32143

#Unit 1. Molecules and their Interaction Relevant to Biology
TLS Online TPP Program

#Question id: 2643

#Unit 2. Cellular Organization

 If in an experiment you mutate the two trp codons in the attenuator to ala codon what will be the impact on repression?
TLS Online TPP Program

#Question id: 1944

#Unit 4. Cell Communication and Cell Signaling

The antiphospholipid syndrome is associated with: