(Question)
Q: Stones, infections, and diabetes threaten the health and functioning of what paired organs? Choices: - tissues - lungs - arteries - kidneys A:
(Answer)
kidneys

(Question)
Q: What can be switched off by a protein called the trp repressor? Choices: - the cytokine - the chaperone protein - the genetic precursor - the operon A:
(Answer)
the operon

(Question)
Q: All organisms must adapt to what in order to survive? Choices: - natural - weather - conditions - environment A:
(Answer)
environment