5 Written Questions
5 Matching Questions
- repetitive DNA
- Leading strand
- a The less condensed form of eukaryotic chromatin that is available for transcription.
- b 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.
- c 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.
- d One of two types of nitrogenous bases found in nucleotides, characterized by a six-membered ring. Cytosine (C), thymine (T), and uracil (U) are pyrimidines.
- e The new complementary DNA strand synthesized continuously along the template strand toward the replication fork in the mandatory 5'?3' direction.
5 Multiple Choice Questions
- A repair system that removes and then correctly replaces a damaged segment of DNA using the undamaged strand as a guide.
- A protein that breaks, swivels, and rejoins DNA strands. During DNA replication, topoisomerase helps to relieve strain in the double helix ahead of the replication fork.
- 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).
- 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.
- 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
primer → 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.
telomere → An enzyme that catalyzes the lengthening of telomeres in eukaryotic germ cells.
bacterium → One of two prokaryotic domains, the other being Archaea.
double helix → A dense region of DNA in a prokaryotic cell.
nucleoid → A dense region of DNA in a prokaryotic cell.