Question

A researcher is carrying out an experiment where she labels a protein with a fluorescent tag (so she can visualize its location in a cell), and introduces this tagged protein into the lumen of a single thylakoid. She observes her treated cells periodically, and notices that the labeled protein can move between grana, but is never observed in the stroma. What can she deduce?a. This protein cannot easily diffuse through the thylakoid membrane.b. All thylakoid membranes and grana share a common lumen, through which the labeled protein can move.c. This protein likely travels between different thylakoid membranes by moving through the stroma, but its movement through the stroma is very brief.d. This protein can easily transfer between the inner and outer mitochondria membranes.e. The protein likely travels through a common lumen shared by thylakoid membranes and grana, and cannot easily diffuse through the thylakoid membrane.

Answer 1

e. The protein likely travels through a common lumen shared by thylakoid membranes and grana, and cannot easily diffuse through the thylakoid membrane.

Step-by-step explanation:

Fluorescent markers are widely used for cell biology analysis, allowing the investigation and monitoring of biomolecules and organelles during metabolic processes related to cell life and death. The research shown in the question above shows the use of these markers. Probably, the researcher used the markers to analyze the movement of the desired protein.

From the results found by the researcher it is possible to conclude that the protein probably travels through a common lumen shared by the tilaco and grain membranes and cannot easily diffuse through the tilaco membrane.