#Question id: 1241
#Unit 4. Cell Communication and Cell Signaling
Which of the following is a common step in the opening/closing of ion channels by acetylcholine and rhodopsin binding to their receptors?
#Question id: 10878
#Unit 7. System Physiology – Animal
The resistance of the pulmonary tree is so low that a 1 cm of water pressure gradient is sufficient to cause normal air flow during resting conditions. Which of the following often has a substantial resistance during pulmonary disease states that can limit alveolar ventilation?
#Question id: 10351
#Unit 6. System Physiology – Plant
Plants contain two types of GOGAT; one accepts electrons from NADH, and the other accepts electrons from ferredoxin (Fd); which one of the following statements is correct?
#Question id: 4553
#Unit 3. Fundamental Processes
The NtrC protein (nitrogen regulatory protein C)—stimulates transcription of the glnA gene, this protein is an activator of σ54-RNA polymerase. Which of the following given characteristics about this protein is incorrect?
#Question id: 407
#Unit 1. Molecules and their Interaction Relevant to Biology
The reaction A + B -> C has a DG'° of –20 kJ/mol at 25° C. Starting under standard conditions, one can predict that: