Storing Genetic Information

The anchor used to start a new DNA strand is called a ________.

primer

In DNA ________, the newest base is reread before another is added to ensure the DNA strand is being copied accurately.

proofreading

The pairing of ________ is responsible for the diameter of a DNA double helix.

purine to pyrimidine

Prion infections cause ________.

lesions in brains

During the ________ phase, a bacteriophage is incorporated into the host genome.

lysogenic

Meselson and Stahl used "heavy" ________ in their replication studies because ________.

nitrogen; it is present in nucleotides

Viruses utilize ________ as their genetic material.

nucleic acids

Genetic information is stored in the ________ of a DNA molecule.

sequence of nucleotides

Viroids differ from viruses in that they ________.

do not produce proteins

Nucleotide excision repair occurs when ________.

enzymes cut a DNA strand on each side of an incorrect base

During the lysogenic phase, a bacteriophage ________.

incorporates into the host genome

________ are spread by eating infected tissue.

Prions

The ________, one of the most complex virions studied, has a head and tail morphology.

T4 bacteriophage

________ have the largest impact on the agriculture industry.

Viroids

All virions consist of ________.

a capsid

Each strand of a parent DNA molecule serves as the template for a ___________ in a daughter molecule; ________ bond after replication.

a complementary strand ; bond