Which enzyme proofreads the DNA during replication?, DNA polymerase, Helicase, Ligase, Primase, Which of the following is true about the leading strand?, Synthesized discontinuously, Synthesized continuously, Made of Okazaki fragments, Does not require primers, On the lagging strand, DNA is synthesized in short fragments because:, DNA polymerase cannot synthesize RNA, Ligase prevents continuous synthesis, Helicase moves slowly, DNA polymerase only works 5′ → 3′, Which of the following correctly describes the direction of DNA synthesis?, 3′ → 5′, Both directions at the same time, 5′ → 3′, Random, When does DNA replication occur?, G₁ phase, S phase, G₂ phase, M phase, Which enzyme unzips the DNA double helix?, DNA polymerase, Ligase, Helicase, Primase, What is the role of DNA polymerase?, Joins Okazaki fragments, Synthesizes RNA primers, Unzips DNA strands, Adds complementary nucleotides and proofreads, Why are Okazaki fragments formed?, DNA polymerase can only synthesize DNA 5′ → 3′, Helicase cannot unzip DNA continuously, DNA ligase cuts the lagging strand, Primase adds too many primers, Which enzyme joins Okazaki fragments on the lagging strand?, Helicase, Primase, DNA polymerase, DNA ligase, What does “semiconservative replication” mean?, Each new DNA has only new strands, DNA replicates without enzymes, Each new DNA has one old and one new strand, DNA strands are copied randomly, Which of the following is true about replication speed?, DNA replication is slow and error-prone, DNA replication occurs from a single origin, DNA polymerase makes many errors, DNA replication is fast and accurate, Which strand is synthesized continuously?, Lagging strand, Leading strand, Okazaki strand, Template strand, How many identical DNA molecules are formed after replication?, 1, 2, 3, 4, Approximately how many nucleotides are added per second in human DNA replication?, 50 nucleotides, 5 nucleotides, 500 nucleotides, 5000 nucleotides, Why does DNA replication occur so quickly in human cells?, DNA polymerase works alone, DNA has hundreds of origins of replication, Only the leading strand is replicated, Replication happens at a single site, What feature of DNA polymerase ensures replication accuracy?, It synthesizes RNA primers, It joins Okazaki fragments, It unzips DNA strands, It proofreads and corrects mistakes.

DNA Replication

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