Question

identify the structure

1. enzyme that unwinds dna
2. fragments of copied dna created on the lagging strand
3. the strand that is copied in a continuous way from the 3 to 5 direction
4. binds okazaki fragments
5. builds new strands by adding complementary bases
6. stabilizes the dna molecule during replication
7. strand that is copied discontinuously because it is traveling away from helicase
8. initiates the synthesis dna by creating a short rna segment at replication fork
9. place the events in the correct order

____ dna polymerase adds nucleotides in the 5 to 3 direction
____ replication fork is formed
____ dna polymerase attaches to the primer
____ okazaki fragments are bound together by ligase
____ dna helicase unwinds dna

Explanation:

1. DNA helicase is the enzyme that unwinds DNA.
2. Okazaki fragments are the fragments of copied DNA created on the lagging strand.
3. The leading strand is copied continuously from the 3' to 5' direction.
4. DNA ligase binds Okazaki fragments.
5. DNA polymerase builds new strands by adding complementary bases.
6. Single - strand binding proteins stabilize the DNA molecule during replication.
7. The lagging strand is copied discontinuously as it travels away from helicase.
8. Primase initiates DNA synthesis by creating a short RNA segment at the replication fork.

For the order of events:

1. DNA helicase unwinds DNA to form the replication fork.
2. Primase creates a primer, then DNA polymerase attaches to the primer.
3. DNA polymerase adds nucleotides in the 5' to 3' direction.
4. Okazaki fragments are formed on the lagging strand and then bound together by ligase.

Answer:

1. DNA helicase
2. Okazaki fragments
3. Leading strand
4. DNA ligase
5. DNA polymerase
6. Single - strand binding proteins
7. Lagging strand
8. Primase

Order of events:
DNA helicase unwinds DNA
Replication fork is formed
DNA polymerase attaches to the primer
DNA polymerase adds nucleotides in the 5' to 3' direction
Okazaki fragments are bound together by ligase