In Southern blotting DNA fragments are separated by _____, transferred to _____, and visualized by _____

1.size / DNA-binding membrane / ethidium bromide
2.charge / filters / colored dye
3.heating / agarose gel / fluorescence under UV light
4.size / DNA-binding membrane / hybridizing with radioactively labeled probes


4

Biology & Microbiology

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The nervous system controls the contraction of in the wall of the bronchioles, thereby adjusting airflow in response to metabolic demands.

A. autonomic; skeletal muscle B. autonomic; smooth muscle C. somatic; skeletal muscle D. somatic; smooth muscle E. autonomic; cartilage

Biology & Microbiology

What is the function of the myelin sheath in the nervous system?

What will be an ideal response?

Biology & Microbiology

In cladistic analysis, a researcher will group species based on similarities derived from common ancestry

a. true b. false

Biology & Microbiology

Which of Darwin's postulates about evolution by natural selection is most directly related to heritable variation?

A. Individuals that survive are not a random sample of the population. B. The individual organisms that make up a population vary in the traits they possess. C. An individual's phenotype can change in response to a challenge from the environment. D. In each generation, many more offspring are produced than can possibly survive.

Biology & Microbiology