Practice Questions

TLS Online TPP Program

#Question id: 4703

Within a few weeks of treatment with the drug 3TC, a patientʹs HIV population consists entirely of 3TC-resistant viruses. How can this result best be explained?

#Unit 11. Evolution and Behavior

HIV can change its surface proteins and resist vaccines.
The patient must have become reinfected with 3TC-resistant viruses.
HIV began making drug-resistant versions of reverse transcriptase in response to the drug.
A few drug-resistant viruses were present at the start of treatment, and natural selection increased their frequency.

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TLS Online TPP Program

#Question id: 28360

#Unit 5. Developmental Biology

Which of the following proteins function as localization of nanos mRNA?

b) tudor & oskar

c) Acron & telson

d) exuperantia & swallow

TLS Online TPP Program

#Question id: 28361

#Unit 5. Developmental Biology

Which of the following protein is involve to the stabilization of Nanos localization complex ?

TLS Online TPP Program

#Question id: 28362

#Unit 5. Developmental Biology

if the Valois is mutant that gives the mutant phenotype except_____

TLS Online TPP Program

#Question id: 28363

#Unit 5. Developmental Biology

Which of the following gene is responsible for the activation of the tips of the embryo and responsible for the specification of terminal axis?

TLS Online TPP Program

#Question id: 28364

#Unit 5. Developmental Biology

Torso receptor present on the whole follicle cells but the activation of torso only the terminal follicle, present torso is activated by the binding of torso like proteins activating the map-kinase cascade pathway and leads to the positional formation such as___

a) At the most anterior terminal end formed acron

b) At the most posterior terminal end formed telson

c) It found only into the most posterior terminal end and formed telson

TLS Online TPP Program

#Question id: 28365

#Unit 5. Developmental Biology

A third set of maternal genes is torso, which responsible for the terminal specification, select the correct combination of about torso gene;

a) Torso leads to the formation of telson by activating the map-kinase cascade pathway

b) Torso responsible for the formation of telson by default

c) Torso along with high concentration of bicoid at the anterior side leads to the formation of acron by default

d) Torso along with high concentration of bicoid at the anterior side leads to the formation of acron by activating the map-kinase cascade pathway