Tag: CSIR NET Life Science Free Test on Gametogenesis and Fertilization

Several marine organism release their gametes into the environment, where sperm attraction and subsequent events lead to successful fertilization. With reference to sea urchins, which one of the following statements […]

Polyspermy results when two or more sperms fertilize an egg. It is usually lethal since it results in blastomeres with different numbers and types of chromosomes. Many species therefore, have […]

15. For successful fertilization in sea urchin, interaction between the surface of the egg and acrosomal proteins, specifically a 30.5 kDa protein called bindin, is necessary. The following factors could […]

Following statements are made about fertilization occurring in sea urchins: A. Chemoattraction of the sperm to the egg is mediated by sperm activating peptides like bindin. B. Exocytosis of the […]

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 […]

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? […]

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 […]

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 […]

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 […]