Experiments by Chapeville and colleagues proved that the genetic code derives its specificity through what interactions?
A) hydrogen bonds and disulfide bonds that maintain the shape of the tRNAs
B) complementary base pairing between amino acids and tRNA
C) complementary base pairing between tRNA and mRNA
D) ionic bonds between the small and large subunits of the ribosome
E) hydrogen bonding between the ribosomal subunits and the mRNA
C
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What interactions exist between a lion pride and a hyena pack?
A) +/+ B) +/o C) +/- D) o/o E) -/-
Both lichens and corals are symbioses involving phototrophic microorganisms
Compare and contrast lichens and corals, including the types of organisms involved, the role of each partner, the specificity of the interaction, and the method of transmission for each symbiosis. What will be an ideal response?
Prereduced, anaerobically sterilized (PRAS) media:
a. are produced, packaged, shipped, and stored under anaerobic conditions. b. have a short shelf life of only 2 weeks. c. enable the culture to be incubated in the regular incubator under aerobic conditions. d. contain peroxides that enhance the growth of certain anaerobes.
Oxygen has an atomic number of 8. This means that oxygen has ____
a. 8 electrons in its outer most shell b. 8 neutrons in its nucleus c. 4 protons and 4 neutrons in its nucleus d. 8 protons in its nucleus e. 8 protons and 8 neutrons in its nucleus