By the process of ____, an organism's tissues store a pollutant taken up from the environment, causing the amount in the body to increase over time
a. pollutant fixation
b. biological magnification
c. chemical buildup
d. pollutant concentration
e. bioaccumulation
e
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With the E. coli trp operon where both repression and attenuation occur, the extent of regulation achieved by repression is ________ the extent of regulation achieved by attenuation.
A. greater than B. less than C. the same as D. Repression is not used in the regulation of the E. coli trp operon.
An insect destroying the ________ layer of tissues in a leaf would lead to a decrease in the ability of gas exchange within the leaf.
A. cuticle B. spongy mesophyll C. xylem D. palisade mesophyll E. epidermis
Of the following, a receptor protein in a membrane that recognizes a chemical signal is most similar to
A) the active site of an allosteric enzyme that binds to a specific substrate. B) tRNA specifying which amino acids are in a polypeptide. C) a metabolic pathway operating within a specific organelle. D) an enzyme having an optimum pH and temperature for activity. E) an antibody in the immune system
In which pathway is the most NADH generated?
What will be an ideal response?