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TLS Online TPP Program

#Question id: 11195

Action potentials move along axons ________.

#7. System Physiology – Animal
  1. more slowly in axons of large than in small diameter
  2. by activating the sodium-potassium "pump" at each point along the axonal membrane
  3. more rapidly in myelinated than in unmyelinated axons
  4. by reversing the concentration gradients for sodium and potassium ions
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TLS Online TPP Program

#Question id: 376

#1. Molecules and their Interaction Relevant to Biology

Phosphoric acid is tribasic, with pKa of 2.14, 6.86 and 12.4. The ionic form that predominates at pH 3.2 is
TLS Online TPP Program

#Question id: 3280

#11. Evolution and Behavior

Small populations are threatened by the loss of genetic diversity from

a. Inbreeding

b. Genetic drift

c. Limited mating
TLS Online TPP Program

#Question id: 4378

#3. Fundamental Processes

This serves as the promoter for 70% of eukaryotic genes and typically serves as a control region for genes that are transcribed at relatively low rates.
TLS Online TPP Program

#Question id: 9579

#10. Ecological Principles

Allen’s rule states that,
TLS Online TPP Program

#Question id: 19874

#13. Methods in Biology

Adding homopolymer tails to the 3’ end of DNA by an enzyme such as