5 Written Questions
5 Matching Questions
- nucleoid region
- DNA polymerase
- x-ray crystallography
- a 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.
- b An enzyme that joins RNA nucleotides to make the primer using the parental DNA strand as a template.
- c An enzyme that catalyzes the elongation of new DNA (for example, at a replication fork) by the addition of nucleotides to the 3' end of an existing chain. There are several different DNA polymerases; DNA polymerase III and DNA polymerase I play major roles in DNA replication in prokaryotes.
- d A dense region of DNA in a prokaryotic cell.
- e Eukaryotic chromatin that remains highly compacted during interphase and is generally not transcribed.
5 Multiple Choice Questions
- A repair system that removes and then correctly replaces a damaged segment of DNA using the undamaged strand as a guide.
- The sugar component of DNA nucleotides, having one fewer hydroxyl group than ribose, the sugar component of RNA nucleotides.
- Member of the prokaryotic domain Bacteria.
- One of two types of nitrogenous bases found in nucleotides, characterized by a six-membered ring. Cytosine (C), thymine (T), and uracil (U) are pyrimidines.
- An isotope (an atomic form of a chemical element) that is unstable; the nucleus decays spontaneously, giving off detectable particles and energy.
5 True/False Questions
bacteria → One of two prokaryotic domains, the other being Archaea.
euchromatin → 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.
topoisomerase → An enzyme that catalyzes the lengthening of telomeres in eukaryotic germ cells.
Lagging strand → The new complementary DNA strand synthesized continuously along the template strand toward the replication fork in the mandatory 5'?3' direction.
chromatin → The less condensed form of eukaryotic chromatin that is available for transcription.