Life Science Mock Test CSIR NET Exam - Part 4

This Quiz is posted with the sole aim of guiding the aspirants of  CSIR-NET Exam to the path of success. To sharpen the edges of your own intelligence and practice, in a structured and concrete manner to ensure you definite Success in your endeavor and will Pave your way for a successful career in Teaching (or) Research Profession . All the very best...... Knock the door of success......

1. 
    Accessory chromosomes are found in __________.
   
   
   
   
   1.  All animals
   
   
   2.  All plants and in few animals
   
   
   3.  Only in some eukaryotic organisms
   
   
   4.  All plants
   
   
   
   
   
   
   
   
   


2. 
   In winter pollution rate enhances due to 
   
   
   
   
   1.  Low temperature
   
   
   2.  SO2 and NO2
   
   
   3.  SPM 
   
   
   4.  Burning of fuels
   
   
   
   
   
   
   
   
   


3. 
   

   
   In photosynthesis, the reaction between ribulose 1, 5,- bisphosphate and oxygen catalysed by enzyme RUBISCO results in formation of ___________.

   
   

   
   
   1.  Glyoxylate and dihydroxyacetone phosphate
   
   
   2.  2, phosphoglycolate and 3, phosphoglycerate
   
   
   3.  Dihydroxyacetone phosphate and 2 phosphoglycolate
   
   
   4.  3, phosphoglycerate and glyoxylate
   
   

   
   
   
   
   
   
   
   
   
   
   
   
   


4. 
   The toxicity of which of the heavy metals leads to liver cirrhosis?
   
   
   
   
   1.  Zinc
   
   
   2.  Mercury
   
   
   3.  Copper
   
   
   4.  Lead
   
   
   
   
   
   
   
   
   


5. 
   This type of biome (habitat) has very long cold winters, short warm summers and typically has acidic soils as a result of the cold temperatures and litter fall.
   
   
   
   
   1.  Taiga (Coniferous forests)
   
   
   2.  Desert
   
   
   3.  Tundra
   
   
   4.  Temperate forests
   
   
   
   
   
   
   
   
   


6. 
   As compared to the distribution of actual sample values, the distribution of "Sample means" will show _______.
   
   
   
   
   1.  A lower standard deviation, no change in mean
   
   
   2.  No change in mean or standards deviation
   
   
   3.  A higher standard deviation, no change in mean
   
   
   4.  A lower mean, no change in standard deviation
   
   
   
   
   
   
   
   
   


7. 
   Which of the following protein purification techniques would be suitable for glycoproteins?
   
   
   
   
   1.  Lectin affinity chromatography
   
   
   2.  Gel filtration chromatography
   
   
   3.  Ion exchange chromatography
   
   
   4.  Silica gel chromatography
   
   
   
   
   
   
   
   
   


8. 
    Sex in Drosophila is determined by ________.
   
   
   
   
   1.  Environmental regulation
   
   
   2.  X/A ratio
   
   
   3.  ZZ/ZW chromosomes
   
   
   4.  XX/XY chromosomes
   
   
   
   
   
   
   
   
   


9. 
   Which of the following compounds is not an inhibitor of electron transport chain?
   
   
   
   
   1.  Cyanide
   
   
   2.  Antimycin A
   
   
   3.  Dinitrophenol
   
   
   4.  Rotenone
   
   
   
   
   
   
   
   
   


10. 
    Chemicals like peroxides and metal ions such as Fe2+ and Cu2+ can cause mutations in DNA by ________.
    
    
    
    
    1.  Introducing double-strand break
    
    
    2.  Converting thymine to uracil
    
    
    3.  Inducing single-strand break of phosphodiester bond
    
    
    4.  Causing transversion of bases
    
    
    
    
    
    
    
    
    

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