Practice Questions

TLS Online TPP Program

#Question id: 30095

In tissues that do not carry out active de novo synthesis, maintenance of an adequate supply of adenine nucleotides:

#Unit 1. Molecules and their Interaction Relevant to Biology

requires ATP uptake from the blood.
depends upon the action of nucleoside phosphorylase.
is accomplished entirely by the action of adenylate kinase.
involves hypoxanthine salvage using HG-PRT.

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TLS Online TPP Program

#Question id: 31251

#Unit 5. Developmental Biology

The regrowth of hair shafts from follicular stem cells in the hair bulge is an example of:

TLS Online TPP Program

#Question id: 31252

#Unit 5. Developmental Biology

In some species, adult structures can undergo dedifferentiation to form a relatively undifferentiated mass of cells that then redifferentiates during morphogenesis of the new structure. Such regeneration is characteristic of:

TLS Online TPP Program

#Question id: 31253

#Unit 5. Developmental Biology

Which of the following regeneration occurs through the re-patterning of existing tissues?

TLS Online TPP Program

#Question id: 31254

#Unit 5. Developmental Biology

What molecular marker of head inducer is found in the hypostome of the hydra during head regeneration?

TLS Online TPP Program

#Question id: 31255

#Unit 5. Developmental Biology

When the hypostome is brought into contact with the trunk of an adult hydra, it induces expression of the__________ in a Wnt-dependent manner.

TLS Online TPP Program

#Question id: 31256

#Unit 5. Developmental Biology

If the Wnt signaling inhibitor GSK3 is itself inhibited throughout the body axis in hydra, results