86. DNA strand have

1. 1. Quaternary structure

   
   
   

   2. Same polarity

   
   
   

   3. Antiparallel polarity

   
   
   

   4. Disulphide bond

   
   
   

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   NA

   Correct Option: C

   NA

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87. In genetic dictionary there are 64 codons as

1. 1. 64 amino acids are the be coded

   
   
   

   2. 64 types of t-RNA are present

   
   
   

   3. There are 44 nonsense codons and 29 sense codons

   
   
   

   4. Genetic code is triplet

   
   
   

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   NA

   Correct Option: D

   NA

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88. Nucleotide base present in DNA and not RNA is

1. 1. Cytosin

   
   
   

   2. Uracil

   
   
   

   3. Thymine

   
   
   

   4. Guanine

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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89. Assertion (A) : In human being the female play a major role in determining the sex of the offspring.
    Reason (R) : Women have two X - chromosomes.
    Codes

1. 1. Both A and Rare true and R is the correct explanation of A.

   
   
   

   2. Both A and R are true but R is not a correct explanation of A.

   
   
   

   3. A is true but R is false.

   
   
   

   4. A is false but R is true.

   
   
   

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   NA

   Correct Option: D

   NA

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90. For a colour blind person red colour appear as

1. 1. Yellow

   
   
   

   2. Blue

   
   
   

   3. Green

   
   
   

   4. Violet

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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