Fertilization happens when a sperm cell successfully meets an egg cell in the fallopian tube. Zygote formation by sperm and egg is result of – (1) membrane fusion (2) exocytosis […]
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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
Understanding Prospective Potency and Fate in Regulative Development
In regulative development, the prospective potency of cells (1) Equal to prospective fate (2) More than prospective fate (3) Lesser than prospective fate (4) Not determined In embryology, the terms […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Understanding Cell Fate: Determined, Committed, Totipotent, or Differentiated?
In an early embryonic transplantation experiment prospective skin cells were transferred near future muscle cell but then also it differentiates into skin cell. The cell would be termed (1) Determined […]
CSIR NET Life Science Previous Year Questions and Solution on Development Biology
Sequence of Events After Sea Urchin Sperm Binds to Egg: What Happens Last?
3. Which of the following is the last to occur after the binding of a sea urchin sperm to an egg? (1) Initiation of mRNA synthesis (2) Increase in cytosolic […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Mosaic Developmental Pattern Explained: Autonomous or Conditional?
Mosaic developmental pattern is always (1) Autonomous (2) Non autonomous (3) Conditional (4) Regulative Mosaic developmental pattern is a fundamental concept in embryology describing how cells in an embryo acquire […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Understanding the Role of Homeotic Genes in Development and Organ Formation
Homeotic genes are responsible for (1) Maintaining gaps in segments (2) Provide gradient for anterior posterior axis of embryo (3) Codes secretory morphogens (4) Formation of organ at defined locations […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Why Morphologically Normal Sperms Fail to Exhibit Hyperactivation: The Role of Capacitation
Sperms are morphologically fit but are unable to actively swim (hyper activation) due to lack of (1) Spermatogenesis (2) Spermiogenesis (3) Prostrate glands (4) Capacitation Introduction to Sperm Motility and […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Homeotic Genes: Master Regulators of Developmental Anatomy
Homeotic genes are responsible for (1) Development of anatomical structures (2) Homeostasis (3) Cell cycle regulation (4) Adaptation to stress Homeotic genes are fundamental genetic components that orchestrate the blueprint […]
CSIR NET LIFE SCIENCE FREE TEST DEVELOPMENTAL BIOLOGY
Understanding Androgenetic Embryos: Experiment, Mechanism, and Developmental Outcomes
From a newly fertilized mouse egg, maternal pronucleus was removed and replaced with a second paternal pronucleus. Following observations/ statements were made: (A) This will result in formation of an […]
Cell-Cell Communication
VE-Cadherin’s Role in Endothelial Cell Survival Through VEGF Signaling: Why N-cadherin Compensation Fails
52. Vascular endothelial (VE)-cadherin is an important cell adhesion molecule for endothelial cells. Endothelial cells that are unable to express VE-cadherin still can adhere to one another via N-cadherin (neural […]
