5 Written questions
5 Matching questions
- DNA polymerase
- Single-strand DNA-binding protein (SSBPs)
- Leading strand
- nucleoid region
- a Member of the prokaryotic domain Bacteria.
- b The new complementary DNA strand synthesized continuously along the template strand toward the replication fork in the mandatory 5'?3' direction.
- 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 protein that binds to the unpaired DNA strands during DNA replication, stabilizing them and holding them apart while they serve as templates for the synthesis of complementary strands of DNA.
- e A dense region of DNA in a prokaryotic cell.
5 Multiple choice questions
- An isotope (an atomic form of a chemical element) that is unstable; the nucleus decays spontaneously, giving off detectable particles and energy.
- The sugar component of DNA nucleotides, having one fewer hydroxyl group than ribose, the sugar component of RNA nucleotides.
- A short segment of DNA synthesized away from the replication fork on a template strand during DNA replication, many of which are joined together to make up the lagging strand of newly synthesized DNA.
- 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.
- The form of native DNA, referring to its two adjacent antiparallel polynucleotide strands wound around an imaginary axis into a spiral shape.
5 True/False questions
phage → A virus that infects bacteria; also called a bacteriophage.
template strand → The DNA strand that provides the pattern, or template, for ordering the sequence of nucleotides in an RNA transcript.
telomerase → An enzyme that catalyzes the lengthening of telomeres in eukaryotic germ cells.
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.
x-ray crystallography → The new complementary DNA strand synthesized continuously along the template strand toward the replication fork in the mandatory 5'?3' direction.