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ZAK TEST SERIES PLUS TWO - 2022, Molecular basis of inheritance, Score: 30, Time: 1 hr, PARTI, A. Answer any three questions from 1 to 4. Each carries 1 score. (3x1=3), 1. A very simple but famous double Helix model for the structure of DNA is, proposed by, a. Maurice Wilkins and Rosalind Franklin b. Friedrich Meischer, c. Erwin Chargaff d. James Watson and Francis Crick, 2. Nitrogen base ----- A- is common for both DNA and RNA and thymine is, present in DNA. --- is present in RNA at the place of Thymine., (Name A and B), 3. Lac-operon is an example for inducible operon. Here inducer is --------4. Name two organisms whose genetic material is RNA., B. Answer all questions from 5 to 6. Each carries 1 score. (2x1=2), 5. A typical nucleosome contains ------ bp of DNA helix., a.100 b.200 c.75 d.10, 6. Two major steps of protein synthesis are A and B. Name A and B, PART II, A. Answer any two questions from 7 to 9. Each carries 2 scores. (2x2=4), 7. Observe the given diagram, , , , , , , , , , . aa, Core of histone molecules, , a) Name the structure., b) Mention A,B and C in the diagram., , 8. The sequence of the coding strand in a transcription unit is written as follows:, 5'-ATGCATGCATGCATGCATGCATGCATGC-3', , Write down the sequence of mRNA., 9. Expand the following a) HGP —_b) BAC, B. Answer any two questions from 10 to 13. Each carries 2 scores. (2x2=4), 10. Write down a) Initiation codon b) Termination codons