rochelle gutierrezPart AWhat catalyzes DNA synthesis? DNA polymerase Primer dNTPs Replication fork Part BWhich of the following statements about DNA synthesis is true? DNA polymerase adds dNTP monomers in the 3’ to 5’ direction. Nucleotides are added in a random fashion to single-stranded DNA. As DNA polymerase moves along the template strand, each new nucleotide provides a 5’ hydroxyl group for the next reaction to occur. Primers are short sequences that allow the initiation of DNA synthesis. Part CWhich part of a deoxynucleoside triphosphate (dNTP) molecule provides the energy for DNA synthesis? Free 3′ hydroxyl (–OH) group Base Phosphate groups Sugar Part DWhich of the following enzymes creates a primer for DNA polymerase? Primase Topoisomerase Ligase Helicase Part EWhich of the following statements about Okazaki fragments in E. coli is true? They are usually 50 to 500 bases long. They are sealed together by the action of helicase. They are formed on the lagging strand of DNA. They are synthesized in the 3’ to 5’ direction. Part FWhich of the following enzymes is important for relieving the tension in a helix as it unwinds during DNA synthesis? Ligase Topoisomerase Single-stranded binding proteins Helicase Part GTrue or false? Single-stranded DNA molecules are said to be antiparallel when they are lined up next to each other but oriented in opposite directions. True False
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