In a transplantation experiment, the area of presumptive ectoderm from an early frog gastrula was transplanted to a region of the newt gastrula destined to become parts of the mouth. […]
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CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES (62)
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Regional Specificity of Induction in Chick Feather Development
In chick, development of wing feather, thigh feather and claws depends on epithelial specificity conferred by induction from mesenchymal components from different sources of the dermins. This may be attributed […]
CSIR NET Life Science Previous Year Questions and Solution on Development Biology
Common Misconceptions in Sea Urchin Fertilization: Clarifying Calcium Signaling and Respiratory Burst
Consider the following events which occur during fertilization of sea urchin eggs. (A) Resact/Speract are peptides released from the egg jelly and help in sperm attraction. (B) Bindin, an acrosomal […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Key Concepts of Induction in Embryonic Development: Understanding Signal and Cellular Responses
Induction is an extrinsic process that depends on the position of a cell in the embryo. It is a process whereby one cell or group of cells can influence the […]
CSIR NET Life Science Previous Year Questions and Solution on Development Biology
Bindin and Its Receptors: Essential Proteins for Species-Specific Sperm-Egg Interaction in Sea Urchins
12. Successful fertilization in sea urchin demands specific interaction between proteins and receptors of sperms and eggs. In view of the above, which one of the following combinations is correct? […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Competence in Developmental Biology: Cells’ Ability to Respond to Inductive Signals
Which one of the following best describes the ability of the cells to respond to a specific inducing signal? (1) Potency (2) Equivalence (3) Competence (4) Specification In the realm […]
CSIR NET Life Science Previous Year Questions and Solution on Development Biology
Step-by-Step Sequence of Events During Sea Urchin Fertilization: From Sperm Attraction to Membrane Fusion
In case of sea urchin, which of the following is the correct sequence of events taking place during the interaction of sperm and egg? (1) Chemo-attraction of sperm to the […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Understanding Competence in Cell-to-Cell Communication During Development
12. Cell to cell communication is important in development of an organism. The ability of cells to respond to a specific inductive signal is called (1) Regional specificity of induction […]
CSIR NET Life Science Previous Year Questions and Solution on Development Biology
How Resact Directs Sperm During Echinoderm Fertilization: The Key to Sperm Chemotaxis
In echinoderms sperm direction is provided by (1) Calcineuric (2) Bindin (3) Resact (4) EBRI Introduction to Sperm Chemotaxis in Echinoderms In echinoderms like sea urchins, fertilization happens externally, posing […]
CSIR NET Life Science Previous Year Questions and Solution on Development Biology
Role of Bindin Protein in Species-Specific Sperm-Egg Adhesion During Sea Urchin Fertilization
Species-specific adhesion of sperm to the egg during sea urchin fertilization, involves the interaction of the sperm adhesive protein (1) Bindin (2) Avidin (3) Fertilin (4) Cortical granule Introduction to […]
