The neck of open culture tubes should be sterilized after removing the cap and before replacing the cap. Open tubes should always be ___________ to minimize the possibility of airborne contamination.
A) held at an angle
B) labeled with tape
C) carried in a sleeve
D) inoculated with the nondominant hand
A) held at an angle
You might also like to view...
The Hardy-Weinberg principle is useful because:a
it explains the existence of variation in populations. b. it proves that Mendel was correct for populations. c. it describes most populations. d. it explains the existence of a large number of species. e. it identifies those factors that can change allele or genotype frequencies.
During both aerobic and anaerobic respiration, the products are similar. Which option below contains products produced by both types of respiration?
A) oxygen and glucose B) carbon dioxide and oxygen C) carbon dioxide and water D) oxygen and water
Prophylaxis is the use of antimicrobial drugs to
A) treat an infection. B) reduce infective dose. C) prevent infection. D) test susceptibility.
The fluid mosaic model proposed by Singer and Nicolson in 1972 explained that
A. the cell membrane was composed of lipids and proteins. B. the cell membrane was composed of a phospholipid bilayer but the polar ends of the phospholipid molecules were reversed. C. the cell membrane was composed of a phospholipid bilayer between two layers of globular proteins. D. the cell membrane was composed of a phospholipid bilayer with globular proteins actually inserted into the bilayer.