1) What shape is a DNA molecule? a) Single helix b) Double helix c) Single twist d) Double twist 2) Which base pairs with Adenine? a) Adenine b) Cytosine c) Guanine d) Thymine 3) Which base pairs with Guanine? a) Adenine b) Cytosine c) Guanine d) Thymine 4) Which base pairs with Cytosine? a) Adenine b) Cytosine c) Guanine d) Thymine 5) Which type of chemical bond joins the two sides of a DNA molecule together a) Covalent b) Hydrogen c) Metallic d) Ionic 6) DNA is made of many repeating units called monomers, it is a ? a) Dimer b) Polymer c) Chain d) monomer 7) What is the complementary DNA sequence to: ATG CCA a) TTC GGT b) CGT AAG c) TAC GGT d) TGC GGT 8) The backbone of DNA is made of: a) Phosphate + sugar b) Nitrate + sugar c) Phosphate + base d) Sugar + base

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