1) Which of the following carries instructions from the nucleus to the cytoplasm. a) DNA only b) Messenger RNA only c) Transfer RNA only d) mRNA, tRNA & rRNA 2) Which two scientists proposed the double helix arrangement of this molecule? a) Hardy & Weinberg b) Darwin & Lamarck c) Watson & Crick  d) Mendel & De Vries 3) Based on structure, in what way do DNA molecules differ from RNA molecules? a) RNA contains the base uracil; DNA does not contain uracil. b) DNA is composed of two chains of nucleotides; RNA is composed of three chains of nucleotides. c) RNA is helical; DNA is branched. d) DNA is composed of four different bases; RNA is composed of three different bases. 4) Deoxyribonucleic acid molecules serve as a template for the synthesis of molecules of... a) amino acids b) carbohydrates c) messenger RNA d) lipids 5) Knowledge of the structure of DNA is important in the study of life because DNA a) stores food b) transmits genetic information c) transmits chemical energy d) stores enzymes 6) What would the complementary sequence of an RNA strand be for the following DNA sequence - T - C - T - A - G - T - C - T a) A - C - A - U - G - C - T - A b) A - G - A - T - C- A - G - A c) A - G - A - U - T - C - G - A d) A - G - A - U -C - A - G - A 7) Which of the following carries the instructions that later get turned into a protein a) mMRNA b) rRNA c) tRNA d) DNA 8) forms part of ribosomes, the parts of a cell that put amino acids together to form a polypeptide chain. a) mRNA b) rRNA c) tRNA d) DNA 9) transfers amino acids in the cytoplasm to the growing polypeptide a) mRNA b) rRNA c) tRNA d) DNA 10) Which of the following is not a possible RNA sequence? a) A - C - T - G - C - A - A - A b) A - C - U - A - G - C -U - A c) A - C - C - A - G - C -U - A d) A - G - U - A - G - C -G - A

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