78. Bacterial two component system includes (1) Sensory kinase and response regulator (2) Sensory kinase and Phosphotransferase (3) Signal and receptor (4) Stimulus and response Bacterial Two-Component System: Sensor Kinase […]
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CSIR NET Life Science Previous Year Questions and Solution cell biology
Bacterial Chemotaxis: Mechanism Behind Smooth Movement and Role of Che Proteins
Smooth movement of bacteria during chemotaxis is due to (1) Due to tumbling (2) Phosphorylation of Chey (3) Movement of H+ across plasma membrane (4) Phosphorylation of Che A Smooth […]
CSIR NET Life Science Previous Year Questions and Solution cell biology
Bacterial Motility Explained: How Flagellin-Based Flagella Propel Bacteria
Bacteria propels with the help of (1) Actin like MreB proteins (2) Tubulin flagella (3) Flagellin Flagella (4) Changes in cytoskeleton How Do Bacteria Propel Themselves? Understanding the Role of […]
CSIR NET Life Science Previous Year Questions and Solution cell biology
“Quorum Sensing in Bacteria: The Key to Population Control and Virulence Regulation”
It has been observed the bacteria secretes toxin at high population density to check the population size. This phenomenon is termed as (1) Quorum sensing (2) Population control (3) Allelopathy […]
CSIR NET Life Science Previous Year Questions and Solution cell biology
Quorum Sensing in Bacillus subtilis: Coordinating Sporulation Through Cell-Cell Communication
74. Which sporulation bacteria possess cell-cell communication mechanism that allows bacteria to coordinate physiological processes in response to cell density? (1) Actinomycetes (2) Bacillus subtilis (3) Cyanobacteria (4) Archeabacteria Sporulating […]
CSIR NET Life Science Previous Year Questions and Solution cell biology
Virus Receptor Usage in Competitive Infection: Dissecting Roles of Receptors X and Y in Virus A and Virus B Entry
In a laboratory experiment it was observed that both ‘Virus A’ and ‘Virus B’ could infect a mammalian host cell, when infected individually. Interestingly, if the cell were first infected […]
CSIR NET Life Science Previous Year Questions and Solution cell biology
Genetic and Molecular Dissection of Hormone-Induced Gene Expression via Let1 and Let2 Proteins
In an organism, expression of gene ‘X’ is induced in the presence of a hormone genetic analysis showed that the hormonal signal is transduced through two proteins Let1 and Let(2) […]
CSIR NET Life Science Previous Year Questions and Solution cell biology
Notch1 Activation by Dll1 and Dll4 Ligands: Distinct Dynamics and Gene Expression Patterns
70. The following patterns of gene expression wereobtained after activating Notch I receptor with twodifferent ligands Dll1, and Dll4 Which one of the following statements depicts the correct of observations? […]
CSIR NET Life Science Previous Year Questions and Solution cell biology
Chimeric Receptor Function: How Ligand Specificity and Signaling Are Determined by Receptor Domains
69. The extracellular domain of a cell surface receptor (A) was switched with the extracellular domain of another receptor (B) to create a chimeric receptor (B-A). Assuming that there is […]
CSIR NET Life Science Previous Year Questions and Solution cell biology
Scaffold Proteins in Signal Transduction: Correcting Misconceptions About Kinase Dynamics
64. Binding of a ligand to a cell-surface receptor activates an intracellular signal transduction pathway through the sequential activation of four protein kinases. In the human cell line A, these […]
