This mechanism is active when the end product of an enzyme-controlled biochemical pathway reaches a high enough concentration to interfere with one of the enzymes essential to the functioning of that pathway. 

A. end-product control
B. negative-feedback control
C. negative by-product control
D. inhibition control


B. negative-feedback control

Biology & Microbiology

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Septicemic plague usually causes death before a diagnosis can be made

Indicate whether the statement is true or false.

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__________ are soils that have roughly equal proportions of sand, silt, and clay. What will be an ideal response?

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If the population of cheetahs continues to decline, genetic drift would be more likely to eliminate new alleles resulting from mutation

a. true b. false

Biology & Microbiology

Bacterial endosymbionts have lost much of their genome and are dependent upon their aphid hosts for survival. Similarly, the aphids depend on the endosymbiotic bacteria for the supply of amino acids that they provide. This interdependence is the result of

A. coevolution. B. amensalism. C. syntrophy. D. microbial antagonism.

Biology & Microbiology