a1. Double stranded and Circular DNA occurs in -(1) Golgi body(2) Mitochondria(3) Nucleus (4) Cytoplasm2. The Double helix model of DNA proposed by Watson and crick was of-(1) C-DNA (2) B-DNA (3) D-DNA (4) Z-DNA3. Select the correct number of nucleotides, if there are 10,000 nitrogenous base pairs in a DNA (1) 500 (2) 10,000(3) 20,000 (4) 40,0004. DNA Double helix model was proposed by-(1). Watson and Crick (2) Schleiden Schwann (3) Singer and Nicholson (4) Kornberg and Khorana5. In structure of DNA molecule, back bone is made up of -(1) Pentose Sugar and phosphate(2) Hexose sugar and phosphate(3) Purine and pyrimidine(4) Sugar and phosphate6. In DNA and RNA common Substance is (1) Hexose Sugar (2) Histamine (3) Thymine (4) Phosphate groups7. What is Nucleotide (1) N2 - base, pentose sugar and phosphoric acid (2) Nitrogen, Hexose sugar and phosphoric acid (3) Nitrogen base, pentose sugar (4) Nitrogen base, trioses and phosphoric acid8. Unit of nucleic acids are-(1) Phosphoric acid(2) Nitrogenous bases (3) Pentose Sugar(4) Nucleotides9. Elementwhich is not found in nitrogenous base:-(1) Nitrogen (2) Hydrogen (3) Carbon (4) Phosphorus10. Who discovered DNA first?(1) Meischer (2) Robert Brown (3) Flemming (4) Watson & Crick
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