5 Written questions
5 Matching questions
- radioactive isotope
- a A small protein with a high proportion of positively charged amino acids that binds to the negatively charged DNA and plays a key role in chromatin structure.
- b An isotope (an atomic form of a chemical element) that is unstable; the nucleus decays spontaneously, giving off detectable particles and energy.
- c A short stretch of RNA with a free 3' end, bound by complementary base pairing to the template strand, that is elongated with DNA nucleotides during DNA replication.
- d 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.
- e Member of the prokaryotic domain Bacteria.
5 Multiple choice questions
- An enzyme that joins RNA nucleotides to make the primer using the parental DNA strand as a template.
- A repair system that removes and then correctly replaces a damaged segment of DNA using the undamaged strand as a guide.
- Type of DNA replication in which the replicated double helix consists of one old strand, derived from the old molecule, and one newly made strand.
- A virus that infects bacteria; also called a phage.
- An enzyme that catalyzes the lengthening of telomeres in eukaryotic germ cells.
5 True/False questions
double helix → 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.
heterochromatin → The less condensed form of eukaryotic chromatin that is available for transcription.
telomere → 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.
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.
Leading strand → A discontinuously synthesized DNA strand that elongates by means of Okazaki fragments, each synthesized in a 5'3' direction away from the replication fork.