Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 56887
TLS Online TPP Program

#Question id: 13173

Landscape ecology is best described as the study of

#Unit 10. Ecological Principles
  1. The flow of energy and materials between the biotic and abiotic components of an ecosystem.
  2. How the structure and function of species enable them to meet the challenges of their environment. 
  3. What factors affect the structure and size of a population over time.
  4. The factors controlling the exchanges of energy, materials, and organisms among ecosystem patches.
More Questions
TLS Online TPP Program

#Question id: 10741

#Unit 10. Ecological Principles

My backyard borders a forest; when my backyard is well-maintained, where it and the forest meet is a(n)
TLS Online TPP Program

#Question id: 15847

#Unit 4. Cell Communication and Cell Signaling

Pathogen-associated molecular patterns (or PAMPs) are common foreign structures that characterize whole groups of pathogens. It is these unique antigenic structures that the immune system frequently recognizes first. Animals, both invertebrates and vertebrates, have evolved to express several types of cell surface and soluble proteins that quickly recognize many of these PAMPs; a form of pathogen profiling. For example, encapsulated bacteria possess a polysaccharide coat with a unique chemical structure that is not found on other bacterial or human cells. White blood cells naturally express a variety of receptors, collectively referred to as pattern recognition receptors (PRRs), that specifically recognize these sugar residues, sugar residues is recognised by?
TLS Online TPP Program

#Question id: 13205

#Unit 6. System Physiology – Plant

The mechanisms that regulate the loading of sucrose from the apoplast to the sieve elements by the sucrose–H+ symporter await characterization. Possible regulatory factors include the following:
a) The solute potential or, more likely, the turgor pressure of the sieve elements
b) Sucrose concentration in the apoplast
c) The available number of symporter protein molecules
Which one of the mechanism that involve to regulate the loading of sucrose?
TLS Online TPP Program

#Question id: 5256

#Unit 8. Inheritance Biology

If the experimental population of E. coli lacks an F factor or F plasmid, and if bacteriophage are excluded from the bacterial cultures, then which of these is a means by which beneficial mutations might be transmitted horizontally to other E. coli cells?
TLS Online TPP Program

#Question id: 19044

#Unit 13. Methods in Biology

Which of the following techniques would be most useful to identify as well as quantify the presence of a known impurity in a drug substance?