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TLS Online TPP Program

#Question id: 1034

A new drug is developed that targets and binds to the lipid A portion of LPS from Gram negative bacterial cells. This drug shows a high degree of activity and binding in a test tube setting against purified lipid A. Based on this information,

#SCPH06 I Botany

  1. we should fast track this drug and get it out to physicians immediately to help prevent toxic/septic shock in humans.

  2. we should do some animal testing with whole Gram-negative cells and the drug before we jump to any conclusions.

  3. we should next proceed by moving to testing in a test tube using whole Gram-negative cells to see if it binds with the same strength.

  4. we should abandon the drug entirely. Binding to lipid A won't kill the bacteria, so the drug is useless to develop further. It wouldn't help humans who have septic shock at all.

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TLS Online TPP Program

#Question id: 9169

#SCPH06 I Botany

In areas of permafrost, stands of black spruce are frequently observed in the landscape, while other tree species are noticeably absent. Often these stands are referred to as "drunken forests" because many of the black spruce often "lean over" (that is, they are displaced from their normal vertical alignment). What is the most likely explanation for the unusual growth of these forests in this marginal habitat?
TLS Online TPP Program

#Question id: 5555

#SCPH01 Biochemistry

The formation of the fertilization envelope requires an increase in the cytosolic concentration of ________.
TLS Online TPP Program

#Question id: 2956

#SCPH05 I Biotechnology

The product of the cdc2 gene is
TLS Online TPP Program

#Question id: 9277

#I Life Science/ Life Sciences Group – I-V

The light energy absorbed by the carotenoids is transferred to chlorophyll for photosynthesis; because of this role they are called
TLS Online TPP Program

#Question id: 4328

#SCPH06 I Botany

Which of the following statements about the DNA in one of your brain cells is true?