5 Written questions
5 Matching questions
- template strand
- a The less condensed form of eukaryotic chromatin that is available for transcription.
- b An enzyme that catalyzes the lengthening of telomeres in eukaryotic germ cells.
- c One of two prokaryotic domains, the other being Archaea.
- d The basic, bead-like unit of DNA packing in eukaryotes, consisting of a segment of DNA wound around a protein core composed of two copies of each of four types of histone.
- e The DNA strand that provides the pattern, or template, for ordering the sequence of nucleotides in an RNA transcript.
5 Multiple choice questions
- Eukaryotic chromatin that remains highly compacted during interphase and is generally not transcribed.
- A repair system that removes and then correctly replaces a damaged segment of DNA using the undamaged strand as a guide.
- A dense region of DNA in a prokaryotic cell.
- 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.
- 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.
5 True/False questions
double helix → The form of native DNA, referring to its two adjacent antiparallel polynucleotide strands wound around an imaginary axis into a spiral shape.
semiconservative model → 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.
deoxyribose → The sugar component of DNA nucleotides, having one fewer hydroxyl group than ribose, the sugar component of RNA nucleotides.
x-ray crystallography → A linking enzyme essential for DNA replication; catalyzes the covalent bonding of the 3' end of one DNA fragment (such as an Okazaki fragment) to the 5' end of another DNA fragment (such as a growing DNA chain).
DNA ligase → A linking enzyme essential for DNA replication; catalyzes the covalent bonding of the 3' end of one DNA fragment (such as an Okazaki fragment) to the 5' end of another DNA fragment (such as a growing DNA chain).