The organisms that obtain energy
by eating nutrients that make up other organisms are called Hetertrophs.
The correct answer between all the choices given is the second choice or
letter B. I am hoping that this answer has satisfied your query about and it
will be able to help you, and if you’d like, feel free to ask another question.
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Answer:
The correct answer is option (b) "addition of a drug that prevents the α subunit from exchanging GDP for GTP".
Explanation:
The G protein is a name given to a family of proteins that act as a switch in diverse cellular processes, transmitting signals from outside to inside of the cells. When a G protein receptor is activated by a neurotransmitter such as dopamine, the alpha subunit exchanges its GDP for a GTP and disassociates G-protein itself. An addition of a drug that prevents this action would prevent G protein disassociation, which would enhance the effect of stimulating G protein that acetylcholine does.