When scientists use a radioactive or fluorescent probe to label target DNA fragments and then transfer the hybridized fragments to a nylon membrane, what is this process called?

a. Southern blotting
b. Northern blotting
c. gel electrophoresis
d. molecular cloning


a. Southern blotting

Biology & Microbiology

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Srb and Horowitz’s research led to the ____ hypothesis, which has since been modified to the ____ hypothesis

a. one gene-one enzyme; one gene-one polypeptide b. one gene-one polypeptide; one gene-one enzyme c. one gene-one protein; one gene-one enzyme d. one gene-one polypeptide; one gene-one protein

e. one gene-one enzyme; one gene-one protein

Biology & Microbiology

The direct result of natural selection is a new species

Indicate whether the statement is true or false.

Biology & Microbiology

Cloning of an entire organism is known as ________

A) gene cloning B) genomics C) regenerative medicine D) reproductive cloning E) rherapeutic cloning

Biology & Microbiology

Organisms that require high salt concentrations for growth are called

A. thermophiles. B. obligate halophiles. C. acidophiles. D. anaerobes.

Biology & Microbiology