What is the pattern of cleavage observed in mammals? (1) Radial (2) Spiral (3) Rotational (4) Bilateral Introduction Embryonic cleavage is the series of cell divisions that transform a fertilized […]
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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 Mammalian Embryonic Cleavage: The Holoblastic Rotational Pattern
Which kind of cleavage is shown in mammals? (1) Holoblastic rotational (2) Meroblastic rotational (3) Holobastic radial (4) Meroblastic radial Introduction Embryonic cleavage is the initial phase of rapid cell […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Why Embryo Size Remains Constant During Early Cleavage Divisions
If an embryo undergoes 13 cleavage divisions during embryogenesis, then the size of the embryo compared to zygote (1) increases 13 times. (2) increases only 6-7 times. (3) increases in […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Understanding Asymmetric Stem Cell Division: Balancing Self-Renewal and Differentiation
Which one of the following statements about stem cells is correct? (1) Stem cells cannot be maintained in culture since they required a distinct in vivo (2) During asymmetric stem […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Fundamental Properties of Stem Cells: Unlimited Self-Renewal and Multipotent Differentiation
The two major properties of stem cells are (1) unlimited self-renewal and multi potent differentiation (2) limited passage and transformation (3) unidirectional differentiation and commitment (4) limited life span and […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Understanding Instructive and Permissive Interactions in Cell Development: Analogies with Cell Lines and Stem Cells
35. Instructive and permissive interactions are two major modes of inductive interaction during development. The following compares some properties of cell lines and cord blood stem cells. Cell lines which […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Understanding Morphogen Gradients and Their Role in Cell Specification
Following are certain statements regarding morphogen gradients and cell specification. (A) Morphogens are always transcription factors. (B) Morphogens can be paracrine factors that are produced in one group of cells […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Understanding Amphibian Eggs: Mesolecithal Yolk Amount and Holoblastic Cleavage
Which is true for amount of yolk and cleavage in egg of amphibian? (1) Mesolecithal and holoblastic cleavage (2) Isolecithal and holoblastic cleavage (3) Mesolecithal and meroblastic cleavage (4) Microlecithal […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Positional Information and Developmental Plasticity in Drosophila Leg Transplantation Experiments
In an experiment, the cells that would normally become the middle segment of a Drosophila leg were removed from the leg forming area of the larva and were placed in […]
CSIR NET Life Science Previous Year Questions and Solution on Cell-Cell Communication
Inositol 1,4,5-Trisphosphate (IP3): The Key Molecule Triggering Calcium Release During Sea Urchin Fertilization
Fertilization in sea urchin eggs involves Ca2+ release from the endoplasmic reticulum for cortical granule reactivation. The major molecule responsible for releasing Ca2+ from intracellular stores is (1) zonapellucida glycoproteins […]
