Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 2186
TLS Online TPP Program

#Question id: 2211

Which of these statements about facilitated diffusion across a membrane is true?

#Unit 2. Cellular Organization

  1. A specific membrane protein lowers the activation energy for movement of the solute through the membrane.

  2. It can increase the size of a transmembrane concentration gradient of the diffusing solute.

  3. It is impeded by the solubility of the transported solute in the nonpolar interior of the lipid bilayer.

  4. It is responsible for the transport of gases such as O2, N2, and CH4 across biological membranes.

More Questions
TLS Online TPP Program

#Question id: 26894

#Unit 10. Ecological Principles

Number of species of vertebrate animal (Global) in decreasing order
TLS Online TPP Program

#Question id: 34134

#Unit 7. System Physiology – Animal

A 45-year-old male with type 2 diabetes mellitus presents for routine follow-up. His fasting blood glucose is 110 mg/dL, but his HbA1c is 8.5%. Which of the following best explains the discrepancy between his fasting glucose and HbA1c?
TLS Online TPP Program

#Question id: 3930

#Unit 3. Fundamental Processes

Which is not part of the lac operon?
TLS Online TPP Program

#Question id: 5142

#Unit 5. Developmental Biology

The D set of blastomeres is the “organizer” of snail embryos. Experiments have demonstrated that the non-diffusible polar lobe [cortical] cytoplasm that is localized to the D blastomere is extremely important in normal molluscan development.  Which of the following is incorrect?
TLS Online TPP Program

#Question id: 5121

#Unit 5. Developmental Biology

Following statements are being made regarding ‘stem cells. Which statement is incorrect?