5 Written Questions
5 Matching Questions
- template strand
- nucleoid region
- a 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.
- b The sugar component of DNA nucleotides, having one fewer hydroxyl group than ribose, the sugar component of RNA nucleotides.
- c The DNA strand that provides the pattern, or template, for ordering the sequence of nucleotides in an RNA transcript.
- d A dense region of DNA in a prokaryotic cell.
- e One of two prokaryotic domains, the other being Archaea.
5 Multiple Choice Questions
- A virus that infects bacteria; also called a phage.
- The tandemly repetitive DNA at the end of a eukaryotic chromosome's DNA molecule that protects the organism's genes from being eroded during successive rounds of replication. See also repetitive DNA.
- A virus that infects bacteria; also called a bacteriophage.
- A repair system that removes and then correctly replaces a damaged segment of DNA using the undamaged strand as a guide.
- 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
helicase → An enzyme that untwists the double helix of DNA at the replication forks, separating the two strands and making them available as template strands.
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.
DNA polymerase → 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.
telomerase → An enzyme that catalyzes the lengthening of telomeres in eukaryotic germ cells.
transformation → The less condensed form of eukaryotic chromatin that is available for transcription.