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TLS Online TPP Program

#Question id: 7142

Keeping in mind the fact that genes are often named for the phenotype of a mutation in that gene, what might be the phenotype of a mutation of the Distal-less gene of Drosophila?

#Unit 5. Developmental Biology
  1. Mutations of distal-less would fail to pattern the wing veins along their antero-posterior axis
  2. Distal-less mutants would form only distal structures, like the tarsus (distal end) of the legs without a coxa (proximal end).
  3. Distal-less mutants would form only proximal structures, like the coxa (proximal end) of the legs without a tarsus (distal end).

  4. Distal-less mutants would fail to form the signaling center that controls dorso-ventral patterning.

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TLS Online TPP Program

#Question id: 1999

#Unit 4. Cell Communication and Cell Signaling

Which of the following would be most beneficial in treating an individual who has been bitten by a poisonous snake that has a fast-acting toxin?
TLS Online TPP Program

#Question id: 2238

#Unit 2. Cellular Organization

Consider the transport of glucose into an erythrocyte by facilitated diffusion.  When the glucose concentrations are 5 mM on the outside and 0.1 mM on the inside, the free-energy change for glucose uptake into the cell is:  (These values may be of use to you:  R = 8.315 J/mol·K; T = 298 K; 9 (Faraday constant) = 96,480 J/V; N = 6.022×10²³ /mol.)
TLS Online TPP Program

#Question id: 23048

#Unit 12. Applied Biology

Which technique is used to re-remediate contamination above the water table.
TLS Online TPP Program

#Question id: 28978

#Unit 7. System Physiology – Animal

There are following statements would be associated with cortisol, except ?
TLS Online TPP Program

#Question id: 1471

#Unit 4. Cell Communication and Cell Signaling

Proto-oncogenes can change into oncogenes that cause cancer. Which of the following best explains the presence of these potential time bombs in eukaryotic cells?