Practice Questions

TLS Online TPP Program

#Question id: 7122

Contrast involution, epiboly, and convergent extension.

#Unit 5. Developmental Biology

Involution is the movement of cells toward an axis to extend that axis, epiboly is a flattening and spreading of epithelial cells to increase the amount of surface they cover, and convergent extension is the movement of cells inside the embryo as a coherent sheet.
Involution is the movement of cells inside the embryo as a coherent sheet, epiboly is a flattening and spreading of epithelial cells to increase the amount of surface they cover, and convergent extension is movement of cells toward an axis to extend that axis.
Involution is a flattening of epithelial cells to increase the amount of surface they cover, epiboly is the movement of cells inside the embryo as a coherent sheet, and convergent extension is movement of cells toward an axis to extend that axis.
Involution is the movement of cells inside the embryo as a coherent sheet, epiboly is movement of cells toward an axis to extend that axis, and convergent extension is a flattening and spreading of epithelial cells to increase the amount of surface they cove.

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TLS Online TPP Program

#Question id: 15417

#Unit 5. Developmental Biology

Sequence of amphibian lens induction postulated by experiments on embryos of the frog Xenopus laevis ; EXCEPT

TLS Online TPP Program

#Question id: 15418

#Unit 5. Developmental Biology

In which type of interaction, the responding tissue has already been specified and needs only an environment that allows the expression of particular traits?

TLS Online TPP Program

#Question id: 15419

#Unit 5. Developmental Biology

Doris Taylor’s research group used detergents to remove all the cells from a cadaveric rat heart, which leaves behind the natural extracellular matrix. An extracellular matrix scaffold can promote the differentiation and rebuilding of a beating heart. The researchers then infused this ECM scaffold with cardiomyocytes. Now these cells differentiated and organized into a functionally contracting “recellularized” heart. Which of the following statement is correct?

TLS Online TPP Program

#Question id: 15420

#Unit 5. Developmental Biology

signal from the inducing cell is necessary for initiating new gene expression in the responding cell. Without the inducing cell, the responding cell is not capable of differentiating in that particular way, phenomena known as:

TLS Online TPP Program

#Question id: 15421

#Unit 5. Developmental Biology

A signal from the inducing cell is necessary for initiating new gene expression in the responding cell. Without the inducing cell, the responding cell is not capable of differentiating in that particular way, phenomena known as:

TLS Online TPP Program

#Question id: 15422

#Unit 5. Developmental Biology

During Vulval induction in C. elegans, the anchor cell secretes, a paracrine factor which receives by VPCs and become vulva. If the anchor cell is destroyed, the VPCs will not form a vulva. This is the example of: