Final answer:
TRUE. Other selenium-containing enzymes selectively activate or inactivate various hormones in the body.
Step-by-step explanation:
The statement that "Other selenium-containing enzymes selectively activate or inactivate various hormones in the body" is True.
One example of a selenium-containing enzyme that activates hormones is the enzyme iodothyronine deiodinase, which converts the inactive thyroid hormone T4 into the active form T3. This activation of T3 is crucial for the regulation of metabolism.
On the other hand, selenium-containing enzymes also play a role in inactivating hormones. For instance, the enzyme glutathione peroxidase helps in the inactivation of reactive oxygen species (ROS), which can interfere with hormone signaling.