5 Written Questions
5 Matching Questions
- semiconservative model
- nucleoid region
- 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 A dense region of DNA in a prokaryotic cell.
- c 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.
- d Eukaryotic chromatin that remains highly compacted during interphase and is generally not transcribed.
- e 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.
5 Multiple Choice Questions
- Site where the replication of a DNA molecule begins, consisting of a specific sequence of nucleotides.
- An isotope (an atomic form of a chemical element) that is unstable; the nucleus decays spontaneously, giving off detectable particles and energy.
- An enzyme that catalyzes the lengthening of telomeres in eukaryotic germ cells.
- 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.
- The cellular process that uses specific enzymes to remove and replace incorrectly paired nucleotides.
5 True/False Questions
repetitive DNA → Nucleotide sequences, usually noncoding, that are present in many copies in a eukaryotic genome. The repeated units may be short and arranged tandemly (in series) or long and dispersed in the genome.
transformation → (1) The conversion of a normal animal cell to a cancerous cell. (2) A change in genotype and phenotype due to the assimilation of external DNA by a cell.
bacteria → Member of the prokaryotic domain Bacteria.
bacterium → Member of the prokaryotic domain Bacteria.
primer → An enzyme that joins RNA nucleotides to make the primer using the parental DNA strand as a template.