Some compounds are themselves not carcinogens, but their metabolic activity on the compound produces intermediates that are carcinogenic. This process is known as
A) precarcinogenesis.
B) carcinogen activation.
C) metabolic carcinogenesis.
D) plasminogen activation.
E) DNA mutagenesis.
B) carcinogen activation.
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Although it is too simple an explanation, the concept of a key fitting into a lock is descriptive of the:
a. inhibition of enzymes by small molecules b. fit of coenzymes to enzymes c. matching of enzyme with substrate d. regeneration of ATP from ADP e. stepwise cascade of electrons in the oxidation-reduction reactions
Which form of reproduction in protists is associated with a protective, resting cyst stage?
a. transverse binary fission b. longitudinal binary fission c. sexual reproduction d. budding
Suppose the amount of water that has evaporated from the ocean has increased per unit of time. What can be expected to happen at points B and E in the accompanying diagram?
What will be an ideal response?
What is the benefit of using the Earth’s magnetic field to migrate compared to the sun or stars? What will be an ideal response?