Practice Questions

TLS Online TPP Program

#Question id: 7141

Engrailed comes to be expressed in posterior compartments during Drosophila embryogenesis; what is the consequence of engrailed activation of hedgehog (Hh) signaling from the posterior compartment of the wing disc?

#Unit 5. Developmental Biology

Hh activates decapentaplegic (Dpp) signaling at the compartment boundary; Dpp then acts as a morphogen to pattern the development of veins in the wing blade.
Hh signaling from the posterior compartment specifies the adjacent compartment as an anterior compartment.
Hh signaling in the posterior compartment acts as a morphogen to pattern the posterior portion of the wing.
Hh signaling controls the identity of the Imaginal discs, in this case, specifying the disc as the wing disc.

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TLS Online TPP Program

#Question id: 4733

#Unit 8. Inheritance Biology

If a homozygous plant with red peppers is crossed with a homozygous plant with green peppers, all the F1 plants have red peppers. When the F1 are crossed with one another, the F2 are in a ratio of 9 red : 3 brown : 3 yellow : 1 green due to

TLS Online TPP Program

#Question id: 19005

#Unit 13. Methods in Biology

If the molecule is non-polar which of the following chromatography can be used to analysed sample

TLS Online TPP Program

#Question id: 31123

#Unit 2. Cellular Organization

Which of the following transporter protein degrade transverse asymmetry?

TLS Online TPP Program

#Question id: 26950

#Unit 10. Ecological Principles

A population is growing logistically with a growth rate (r) of 0.16/month, in an environment with a carrying capacity of 200. What is the maximum growth rate (no. of individuals/ month) that this population can achieve?