How Would the Signal of a G Protein-Coupled Receptor, Without

question 47

Multiple Choice

How would the signal of a G protein-coupled receptor, without ligand, be affected if you made a G protein that converted GDP to GTP on its own without needing to be activated by the G protein-coupled receptor?

• A)The signal wouldn't be affected; there is no ligand, thus no signal.
• B)The signal wouldn't be affected; the ligand would be unable to bind due to the conformational change.
• C)The G protein would be active but unable to signal due to the lack of ligand.
• D)The G protein would be active and signaling, despite the lack of ligand.

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Definitions:

Gametes

Reproductive cells (sperm in males and eggs in females) that carry half the genetic information of an individual and can unite with another to form a new organism.

Uterine Tube

Also known as the fallopian tube, it is a part of the female reproductive system that transports the ova from the ovary to the uterus.

Fetal Development

The process of growth and development within the womb, from the formation of an embryo to the birth of a baby.

Human Chorionic Gonadotropin

A hormone produced by the placenta shortly after implantation, used in medical contexts as an indicator of pregnancy.