DNA Structure and Replication: Multiple Choice

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01A DNA nucleotide is composed of three parts: a phosphate group, a deoxyribose sugar, and what else?
02Which enzyme synthesizes new DNA strands by reading the template and adding complementary nucleotides?
03The 'backbone' of a DNA strand is formed by alternating sugar and phosphate groups linked by what type of bond?
04Which of the following is NOT a nitrogenous base found in DNA?
05The characteristic twisted-ladder shape of a DNA molecule is described as a...
06According to the rules of base pairing, adenine (A) always pairs with which base in a DNA molecule?
07During DNA replication, which enzyme is responsible for 'unzipping' the double helix by breaking the hydrogen bonds between the base pairs?
08In the DNA double helix, guanine (G) forms a base pair with which other nitrogenous base?
09On the lagging strand during replication, short segments of DNA called Okazaki fragments are joined together by which enzyme?
10What is the specific five-carbon sugar that forms the backbone of a DNA molecule?
11What type of chemical bond connects the complementary nitrogenous bases and holds the two strands of DNA together?
12DNA replication is called 'semi-conservative' because each new DNA molecule produced consists of...