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The Chhattisgarh Class 12 Board Biology paper carries 75 marks in total. Time limit for the examination is 3 hours. All answers are to be written within maximum word limit given. Students must be tactful enough to cover all the important points within those words. Chances of options are negligible as all the questions are compulsory. Students must be thorough with the subject. All round knowledge about the subject helps in scoring good marks in this paper. Apart from thorough knowledge one should have idea about the paper pattern. So it is very important to refer previous years’ question papers. Below are attached some of the previous years question papers. For more details and information visit:http://entrance-exam.net/chhattisgar...iology-papers/

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2. If the sequence of nitrogen bases of the coding strand of DNA in a transcription unit is: