Question

7.3 vocabulary and concept review - ii
drag the words into the correct boxes

1. the basic structural unit of dna packaging in eukaryotes which consists of a segment of dna wound around eight histone proteins and resembles thread wrapped around a spool is the
2. is an enzyme that synthesizes short rna sequences called primers which serve as a starting point for dna synthesis.
3. an enzyme which unwinds the dna double helix ahead of the replication fork during replication is
4. an enzyme which replaces the rna primer with dna in replication is
5. dna wraps around which are proteins that provide structural support to a chromosome by helping very long dna molecules fit into the nucleus of a cell and giving the chromosome a more compact shape.
6. is an enzyme used during replication to join together the okazaki fragments which are formed on the lagging strand.
7. an is a particular sequence in a genome where replication is initiated in both prokaryotes and eukaryotes.
8. means that one strand of the parent double helix is conserved in each new dna molecule.

dna primase
nucleosome
histones
topoisomerase
dna polymerase i
origin of replication
ligase
semi - conservative replication

Explanation:

1. The basic unit of DNA packaging in eukaryotes with DNA wound around histones is the nucleosome.
2. DNA Primase synthesizes RNA primers for DNA synthesis.
3. Topoisomerase unwinds the DNA double - helix ahead of the replication fork.
4. DNA polymerase I replaces the RNA primer with DNA.
5. DNA wraps around histones for structural support and compacting.
6. Ligase joins Okazaki fragments on the lagging strand during replication.
7. The origin of replication is the sequence where replication starts in prokaryotes and eukaryotes.
8. Semi - conservative replication means one parental strand is conserved in each new DNA molecule.

Answer:

1. nucleosome
2. DNA Primase
3. topoisomerase
4. DNA polymerase I
5. histones
6. ligase
7. origin of replication
8. semi - conservative replication