pre lecture 15 bio

The enzyme responsible for joining Okazaki fragments together during DNA replication is: DNA polymerase. DNA ligase. topoisomerase II. helicase. DNA replicase.

DNA ligase.

The enzyme that catalyzes the addition of new nucleotides to a growing DNA strand is: topoisomerase II. DNA ligase. helicase. DNA polymerase. DNA replicase.

DNA polymerase.

Telomerase is fully active in _____ and _____ cells, but almost completely inactive in _____ cells. somatic; germ; stem somatic; blood; germ germ; stem; somatic germ; somatic; stem stem; blood; germ

germ; stem; somatic

The polymerase chain reaction (PCR) is used to generate: multiple copies of a targeted region of DNA. multiple copies of whole chromosomes and a targeted region of DNA. multiple copies of whole chromosomes. single copies of whole chromosomes. a single copy of a targeted region of DNA.

multiple copies of a targeted region of DNA.

Each DNA parent strand within a replication bubble acts as a template strand that produces: one leading strand and one lagging strand. only leading strands. only lagging strands. either a leading strand or a lagging strand. two leading strands or two lagging strands.

one leading strand and one lagging strand.

As a piece of linear DNA is replicated, the leading strand will have _____ RNA primer(s) and the lagging strand will have _____ RNA primer(s). one; one one; many many; one many; many one; two

one; many

In a long DNA molecule, each origin of replication produces a _____ with a _____ on each side. replication fork; DNA ligase replication bubble; replication fork replication bubble; DNA ligase None of the other answer options is correct. replication fork; replication bubble

replication bubble; replication fork

When double stranded DNA is heated to about 95 degrees Celsius it denatures. Denaturation destroys the double helical structure irreversibly. breaks covalent bonds. causes new hydrogen bonds to form. separates the two strands. involves hydrolysis of the DNA.

separates the two strands.

Each end of a eukaryotic chromosome is capped by a repeating DNA sequence called the

telomere

In DNA replication, each individual parent strand acts as a _____ strand for the synthesis of a _____ strand. duplicate; daughter daughter; template template; daughter template; duplicate daughter; duplicate

template; daughter