12th Class Biology Sample Paper Practice Paper - 1

  • question_answer
    Direction: Read the following and answer the questions that follows.
    DNA is made up of millions of nucleotides. These are molecules composed of a deoxyribose sugar, with a phosphate and a base (or nucleobase) attached to it. These nucleotides are attached to each other in strands via phosphodiester bonds to form a 'sugar phosphate backbone'. DNA replication also known as semiconservative replication is the process by which DNA is essentially double. It is an important process that takes place within the dividing cell.
    Which among the following pairs of nitrogen bases are correct?

    A) A=C, T=G                   

    B) A=L C=G

    C) A=G, C=T                   

    D) All of these

    Correct Answer: B

    Solution :

    A=L C=G


You need to login to perform this action.
You will be redirected in 3 sec spinner