1) DNA is a type of a) protein b) lipid c) carbohydrate d) nucleic acid 2) The building block of DNA is called a a) helix b) nucleotide c) chromosome d) fatty acid 3) Each nucleotide is made of (select all that apply)  a) amino acids, proteins, and lipds b) sugar, phosphate, and a nitrogen base c) DNA and rNA d) carbon, hydrogen, and oxygen 4) According to base pairing rules, the base cytosine (C) pairs with a) adenine (A) b) cytosine (C) c) thymine (T) d) guanine (G) 5) DNA is made of a) 2 identical strands b) 2 complementary strands c) 1 single strand d) 2 identical chromosomes 6) DNA strands are held together by a) strong hydrogen bonds b) weak hydrogen bonds c) sugar and phosphate bonds d) duct tape 7) A section of DNA that codes for a certain protein is called a a) chromosome b) helix c) gene d) phosphate 8) If one strand of DNA has the following bases: T C G G A A, then the complementary strand will have the following bases (in order):  a) T C G G A A b) C G C C A A c) T T C C A G d) A G C C T T 9) Tightly coiled strands of DNA are called a) chromosomes b) genes c) sister chromatids d) RNA 10) How many chromosomes does each human body cell have? a) 72 b) 23 c) 46 d) 92 11) Where is DNA found in a eukaryotic cell? a) In the cell cytoplasm b) In the nucleus 12) During what phase of the cell cycle does DNA get replicated? a) cytokinesis b) telophase c) prophase d) interphase 13) At the end of DNA replication, a human body cell would have _________ chromosomes . a) 23 b) 46 c) 92 14) In this picture, the nitrogen base is represented by a) the gray rectangle b) the red pentagon c) the green circle 15) Is the following chromosome replicated ? a) Yes b) No

DNA Structure and Replication

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