Practice Questions

TLS Online TPP Program

#Question id: 4650

DDT was once considered a ʺsilver bulletʺ that would permanently eradicate insect pests. Today, instead, DDT is largely useless against many insects. Which of these would have been required for this pest eradication effort to be successful in the long run?

#XL - S Microbiology

Larger doses of DDT should have been applied.
All habitats should have received applications of DDT at about the same time.
The frequency of DDT application should have been higher.
None of the individual insects should have possessed genomes that made them resistant to DDT.

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TLS Online TPP Program

#Question id: 1102

#XL - Q Biochemistry

Caffeine is an inhibitor of phosphodiesterase. Therefore, the cells of a person who has recently consumed coffee would have increased levels of which of the following molecules?

TLS Online TPP Program

#Question id: 1570

#XL - S Microbiology

Which cells and which signaling molecules are responsible for initiating an inflammatory response?

TLS Online TPP Program

#Question id: 2995

#XL - S Microbiology

Which of the following incorrect pair?

TLS Online TPP Program

#Question id: 5531

#XL - T Zoology

The trophoblast forms to the