The area around a nucleus where an electron is most likely to be found is the:

A. electrical space.
B. energy level.
C. polar space.
D. orbital.


D

Biology & Microbiology

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Viruses are isolated from wild-type E. coli cells that have been infected with wild-type bacteriophage ?. These viruses are used to infect a Gal? strain of E. coli. A few bacterial colonies that can grow on galactose are obtained, while no bacteria that can grow on galactose are obtained from cells that were not infected. What has happened?

A) A ? gal+ phage was generated. B) Reversion mutations have occurred. C) The bacteria underwent conjugation with a Gal+ strain. D) The bacteria underwent transformation with a wild-type E. coli strain.

Biology & Microbiology

Identify two ways in which posttranscriptional gene regulation occurs in eukaryotes and briefly

explain each. What will be an ideal response?

Biology & Microbiology

Why should GM foods be considered on a case-by-case basis instead of making general statements about all GM foods?

What will be an ideal response?

Biology & Microbiology

Which virus may play a role in multiple sclerosis?

A. Cytomegalovirus (CMV) B. Epstein Barr Virus C. Herpes simplex virus-2 D. Smallpox E. Human herpesvirus 6 (HHV-6)

Biology & Microbiology