Researchers often work with temperature-sensitive mutations ________, because null alleles of these genes create mutants that cannot grow under any conditions.

A) that confer antibiotic resistance
B) in essential genes
C) that affect colony morphology
D) that affect metabolism


B) in essential genes

Biology & Microbiology

You might also like to view...

The cell membrane of P. jirovecii contains _______ rather than _______, which differentiates it from other fungi

a. sterols; cholesterol b. ergosterol; sterols c. cholesterol; ergosterol d. sitosterol; sterols

Biology & Microbiology

The trachea is located behind the esophagus.

a. true b. false

Biology & Microbiology

Contact lens cleaners commonly use which type of chemical agent to control microbial growth?

A) alkylating agents B) peroxygen C) quats D) supercritical fluid

Biology & Microbiology

What two major types of recombination involve exchange between duplex DNAs?

What will be an ideal response?

Biology & Microbiology