Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 25951
TLS Online TPP Program

#Question id: 343

Assume that acid rain has lowered the pH of a particular lake to pH 5.0. What is the hydroxide ion concentration of this lake?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. 1 × 10^-9 mol of hydroxide ions per liter of lake water

  2. 1 × 10^-5 mol of hydroxide ions per liter of lake water

  3. 5.0 M hydroxide ion

  4. 5.0 × 10^-5 mol of hydroxide ions per liter of lake water

More Questions
TLS Online TPP Program

#Question id: 12334

#Unit 10. Ecological Principles

If a meteor impact or volcanic eruption injected a lot of dust into the atmosphere and reduced the sunlight reaching Earth's surface by 70% for one year, all of the following marine communities most likely would be greatly affected except
TLS Online TPP Program

#Question id: 11198

#Unit 7. System Physiology – Animal

The "undershoot" phase of hyperpolarization is due to ________.
TLS Online TPP Program

#Question id: 3485

#Unit 11. Evolution and Behavior

Optimal foraging involves all of the following except

A) maximizing energy gained by the forager.

B) minimizing energy expended by the forager.

C) securing essential nutrients for the forager.

D) minimizing the risk of predation on the forager.

E) maximizing the population size of the forager
TLS Online TPP Program

#Question id: 6974

#Unit 5. Developmental Biology

Where are the stem cells that renew the epithelium of the gut found?
TLS Online TPP Program

#Question id: 15366

#Unit 4. Cell Communication and Cell Signaling

For pro-proliferation signaling pathways to cause uncontrolled proliferation, as is seen in cancer, this p53 up-regulation must not occur, It is therefore not surprising that p53 is inactive in most human tumors through loss of p53 function itself, down-regulation of positive regulators (PR) of p53 or up-regulation of negative regulators (NR) of p53, these regulators are accordingly