Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 54941
TLS Online TPP Program

#Question id: 11494

How do aquaporins allow the passage of H2O but not H3O+?

#Unit 2. Cellular Organization
  1. aquaporin interrupts this process by forming covalent bonds from the side chain NH2 groups of two highly conserved Asn residues to a water molecule that is centrally located in the pore.
  2. aquaporin interrupts this process by forming hydrogen bonds from the side chain NH2 groups of two highly conserved Asp residues to a water molecule that is centrally located in the pore.
  3. aquaporin interrupts this process by forming hydrogen bonds from the side chain NH2 groups of two highly conserved Asn residues to a water molecule that is centrally located in the pore.
  4. aquaporin interrupts this process by forming hydrogen bonds from the side chain COO- groups of two highly conserved Asn residues to a water molecule that is centrally located in the pore.
More Questions
TLS Online TPP Program

#Question id: 24236

#Unit 4. Cell Communication and Cell Signaling

Which of the following protein suppresses the expression of E-cadherin during epithelial-to-mesenchymal transition?
TLS Online TPP Program

#Question id: 16103

#Unit 7. System Physiology – Animal

The set point level for body temperature is situated in:
TLS Online TPP Program

#Question id: 10218

#Unit 6. System Physiology – Plant

An effect that appears to be a major factor in the stability of the photosynthetic apparatus is photoinhibition, which occurs when excess excitation arriving at the PSII reaction center leads to its inactivation and damage due to
TLS Online TPP Program

#Question id: 4975

#Unit 11. Evolution and Behavior

The observation that tusks were limited to males in several species, and were apparently not used in food-gathering, is evidence that the tusks probably
TLS Online TPP Program

#Question id: 8953

#Unit 9. Diversity of Life Forms

The blastopore denotes the presence of an endoderm-lined cavity in the developing embryo, a cavity that is known as the