81. The function of nucleolus is the synthesis of

1. 1. DNA

   
   
   

   2. m-RNA

   
   
   

   3. r-RNA

   
   
   

   4. t-RNA

   
   
   

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   r-RNA

   Correct Option: C

   r-RNA

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82. F₁ particles / oxysome / elementary particles are present in

1. 1. endoplasmic reticulum

   
   
   

   2. chloroplast

   
   
   

   3. mitochondria

   
   
   

   4. golgi complex

   
   
   

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   Oxysomes (Elementary particles or inner membranes sub-units or F₁ particles); these are responsible for respiratory chain phosphorylation.

   Correct Option: C

   Oxysomes (Elementary particles or inner membranes sub-units or F₁ particles); these are responsible for respiratory chain phosphorylation.

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83. Which of the following is related to glycosylation of protein ?

1. 1. Endoplasmic reticulum

   
   
   

   2. Peroxisome

   
   
   

   3. Lysosome

   
   
   

   4. Mitochondria

   
   
   

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   Almost all the proteins synthesized by ER bounded ribosomes are converted into glycoproteins and this glycosylation occurs in the rough ER.

   Correct Option: A

   Almost all the proteins synthesized by ER bounded ribosomes are converted into glycoproteins and this glycosylation occurs in the rough ER.

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84. When the concentration of water and solutes on either side of the cell membrane is same, the solution is said to be

1. 1. hypertonic

   
   
   

   2. isotonic

   
   
   

   3. hypotonic

   
   
   

   4. None of these

   
   
   

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   hypotonic

   Correct Option: C

   hypotonic

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85. The shape of chromosome is clearly visible at

1. 1. prophase

   
   
   

   2. anaphase

   
   
   

   3. metaphase

   
   
   

   4. telophase

   
   
   

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   metaphase

   Correct Option: C

   metaphase

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