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

Biology & Microbiology

You might also like to view...

In addition to being a group of gram-negative bacteria considered normal flora of the gastroin-testinal tract of humans and animals, which one of the following also contains agents of impor-tant diseases such as gastroenteritis and enteric fevers, urinary tract infections, and bacterial pneumonia?

a. Neisseriaceae b. Micrococcaceae c. Enterococcus d. Enterobacteriaceae

Biology & Microbiology

Atoms with different numbers of which component are considered to be distinct elements?

a. electrons b. neutrons c. protons d. orbitals

Biology & Microbiology

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.

Biology & Microbiology

Passive immunotherapy does not result in immunological memory

Indicate whether the statement is true or false

Biology & Microbiology