5 Written Questions
5 Matching Questions
- Okazaki fragment
- replication fork
- x-ray crystallography
- nucleotide excision repair
- a A repair system that removes and then correctly replaces a damaged segment of DNA using the undamaged strand as a guide.
- b A short segment of DNA synthesized away from the replication fork on a template strand during DNA replication, many of which are joined together to make up the lagging strand of newly synthesized DNA.
- c A Y-shaped region on a replicating DNA molecule where the parental strands are being unwound and new strands are growing.
- d A technique that depends on the diffraction of an X-ray beam by the individual atoms of a crystallized molecule to study the three-dimensional structure of the molecule.
- e The less condensed form of eukaryotic chromatin that is available for transcription.
5 Multiple Choice Questions
- The form of native DNA, referring to its two adjacent antiparallel polynucleotide strands wound around an imaginary axis into a spiral shape.
- A protein that breaks, swivels, and rejoins DNA strands. During DNA replication, topoisomerase helps to relieve strain in the double helix ahead of the replication fork.
- A dense region of DNA in a prokaryotic cell.
- An enzyme that joins RNA nucleotides to make the primer using the parental DNA strand as a template.
- The new complementary DNA strand synthesized continuously along the template strand toward the replication fork in the mandatory 5'?3' direction.
5 True/False Questions
nucleoid region → The basic, bead-like unit of DNA packing in eukaryotes, consisting of a segment of DNA wound around a protein core composed of two copies of each of four types of histone.
Single-strand DNA-binding protein (SSBPs) → A protein that binds to the unpaired DNA strands during DNA replication, stabilizing them and holding them apart while they serve as templates for the synthesis of complementary strands of DNA.
Mismatch repair → The cellular process that uses specific enzymes to remove and replace incorrectly paired nucleotides.
chromatin → The complex of DNA and proteins that makes up a eukaryotic chromosome. When the cell is not dividing, chromatin exists in its dispersed form, as a mass of very long, thin fibers that are not visible with a light microscope.
bacterium → One of two prokaryotic domains, the other being Archaea.