5 Written questions
5 Matching questions
- replication fork
- origin of replication
- a An enzyme that joins RNA nucleotides to make the primer using the parental DNA strand as a template.
- b 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.
- c An enzyme that cuts DNA or RNA, either removing one or a few bases or hydrolyzing the DNA or RNA completely into its component nucleotides.
- d A Y-shaped region on a replicating DNA molecule where the parental strands are being unwound and new strands are growing.
- e Site where the replication of a DNA molecule begins, consisting of a specific sequence of nucleotides.
5 Multiple choice questions
- 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 linking enzyme essential for DNA replication; catalyzes the covalent bonding of the 3' end of one DNA fragment (such as an Okazaki fragment) to the 5' end of another DNA fragment (such as a growing DNA chain).
- An enzyme that catalyzes the lengthening of telomeres in eukaryotic germ cells.
- The sugar component of DNA nucleotides, having one fewer hydroxyl group than ribose, the sugar component of RNA nucleotides.
- A dense region of DNA in a prokaryotic cell.
5 True/False questions
heterochromatin → Eukaryotic chromatin that remains highly compacted during interphase and is generally not transcribed.
Single-strand DNA-binding protein (SSBPs) → The new complementary DNA strand synthesized continuously along the template strand toward the replication fork in the mandatory 5'?3' direction.
pyrimidine → An enzyme that joins RNA nucleotides to make the primer using the parental DNA strand as a template.
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.
euchromatin → The less condensed form of eukaryotic chromatin that is available for transcription.