According to the operon model, for the synthesis of an inducible enzyme to occur, the
A) end-product must not be in excess.
B) substrate must bind to the enzyme.
C) substrate must bind to the repressor.
D) repressor must bind to the operator.
E) repressor must not be synthesized.
C
You might also like to view...
A concatemer is a
A) combination of two or more repeated nucleotide sequences covalently linked together. B) complex of RNA-specific polymerases found only in bacteriophages. C) linker molecule that allows several phages to infect one host. D) polymeric protein.
Conjugation is
1.the uptake of naked DNA from the environment. 2.mediated by bacteriophages. 3.when a copy of DNA from one bacterial cell enters another cell. 4.when one cell divides. 5.when DNA is exchanged between sexually reproducing organisms.
Which of the following is responsible for the actual invasion of the lining of the uterus?
a. trophoblast b. amnion c. inner cell mass d. blastocyst e. placenta
Which is mismatched?
A. green sulfur bacteria - photosynthetic anaerobes that use sulfur in metabolism B. Chlamydias - lack ability to independently complete growth and metabolism C. Myxobacteria - gliding, fruiting slime bacteria D. Cyanobacteria - filamentous, gliding thermophilic bacteria