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17 Cards in this Set

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any of various enzymes that catalyze the unwinding and separation of double-stranded DNA or RNA during its replication
Replication fork
a Y-shaped part of a chromosome that is the site for DNA strand separation and then duplication
any of a class of enzymes that reduce supercoiling in DNA by breaking and rejoining one or both strands of the DNA molecule
DNA polymerase
any of a class of enzymes involved in the synthesis of deoxyribonucleic acid from its deoxyribonucleoside triphosphate precursors.
Leading / lagging strand
the leading strand is the DNA strand at the opposite side of the replication fork; the lagging strand In DNA replication, the strand that is synthesized apparently in the 3' to 5' direction, but actually in the 5' to 3' direction by ligating short fragments synthesized individually.
RNA primase
Primer made by RNA primase, which starts at a specific promoter site and goes for up to 30 nucleotides.
a sudden departure from the parent type in one or more heritable characteristics, caused by a change in a gene or a chromosome.
to replace (one or more elements or groups in a compound) by other elements or groups.
a type of chromosomal aberration in which a segment of the chromosome is removed or lost.
adding of genes
Frameshift mutation
A mutation in a DNA chain that occurs when the number of nucleotides inserted or deleted is not a multiple of three, so that every codon beyond the point of insertion or deletion is read incorrectly during translation.
a substance or preparation capable of inducing mutation.
any substance or agent that tends to produce a cancer.
the reproductive process in ciliate protozoans in which two organisms of different mating types exchange nuclear material through a temporary area of fusion.
the transfer of genetic material from one cell to another by means of a virus.
the transfer of genetic material from one cell to another resulting in a genetic change in the recipient cell.
1.Either of the sections of DNA occurring at the ends of a chromosome. enzyme, active chiefly in tumors and reproductive cells, that causes telomeres to lengthen: facilitates cell division and may account for the immortality of cancer cells.