In attenuation regulation of the trp operon, which stem loop forms when tryptophan is readily available to the cell?
A. 1:3
B. 2:4
C. 2:3
D. 3:4
Answer: D
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a. Neisseriaceae b. Micrococcaceae c. Enterococcus d. Enterobacteriaceae
Atoms with different numbers of which component are considered to be distinct elements?
a. electrons b. neutrons c. protons d. orbitals
Protoplasm is all the living material
A. that makes up the contents of a cell. B. inside the cell membrane except the nucleus. C. inside the nucleus. D. inside the cell except the protein material.
Passive immunotherapy does not result in immunological memory
Indicate whether the statement is true or false