(a) What is the function of helicase in DNA replication? (b) What is the function of DNA polymerase? (c) What are replication forks? Compare and contrast leading and lagging strands.

After Step 1: As DNA replication takes place, nucleosomes assemble rapidly on newly formed daughter DNA molecules. The “new” nucleosomes are a mixture of old (recycled) and newly formed histones, distributed randomly on the two daughter DNA molecules, what is the next step of nucleosome formation during DNA replication?

During DNA replication, the proteins that ensure denatured templates are not re- natured are called .......... ........and the protein that connects the fragmented pieces of DNA in the lagging (discontinuous) strand is called............ I A

Number the steps of DNA replication in the correct order (1, 2, 3) a) ______ Polymerase travels down the DNA parent strand b)______ DNA strands are unzipped c) ______ Ligase binds Okazaki fragments together

Medgie is creating his science fair project on DNA replication. His final display board shows the following. Human DNA Replication Steps Step 1 DNA unwinds in the nucleus Step 2 Complementary base pairs are deleted Step 3 DNA rewinds back together Step 4 The newly made DNA helix is placed in a cell formed in Mitosis According to Medgie's project, which of the following identifies and explains which of the steps is incorrect? O Step 4 is incorrect because not all human cells require DNA. O Step 3 is incorrect because the DNA remains unwound to be transcribed into RNA. Step 2 is incorrect because the complementary base pairs are used as a template, not deleted. Step 1 is incorrect because DNA doesn't unwind in the nucleus, instead it unwinds in the cytoplasm Previous

When DNA is heated sufficiently, the strands separate. The energy that it takes to separate the DNA is related to the amount of guanine and cytosine bases. Why is this so? (A) Adenine and thymine make 3 hydrogen bonds between each other, and guanine and cytosine don't make any hydrogen bonds. (B) Guanine and cytosine make 3 hydrogen bonds between each other, and adenine and thymine don't make any hydrogen bonds. (C) It takes more energy to break an A-T bond than it does a G-C bond. (D) It takes more energy to break a G-C bond than it does an A-T bond.

Some Processes Involved in DNA Replication 1. The replication origin is identified. 2. DNA primase builds RNA primer. 3. Okazaki fragments are spliced by DNA ligase. 4. Helicases bind and uncoil the DNA double helix. 5. RNA primer is the starting point for DNA polymerase. 6. DNA replication ends at the telomere where DNA codes for termination. 7. DNA polymerase adds complementary nucleotides in the 5' to 3' direction in short segments called Okazaki fragments. The sequence in which the events numbered above occur during DNA replication of the lagging strand is , and

Why must replication of DNA proceed in two opposite directions? And what differs about how DNA replication occurs in each direction?