This is some homework for my Cell and Molecular Biology class. Any help would be

Question

This is some homework for my Cell and Molecular Biology class. Any help would be much appreciated!

2. (1 point) Figure below shows the organization of a protein that normally resides in the plasma membrane. The boxes labeled 1 and 2 represent membrane-spanning sequences and the arrow represents a site of action of signal peptidase. Given this diagram, which of the following statements must be true?

Hint; Draw this protein within the translocon (see figure 15-16 on slide 52). Now, which way would the protein be incorporated into a vesicle?

(a)        The N-terminus of this protein is cytoplasmic.

(b)       The C-terminus of this protein is cytoplasmic.

(c)        The mature version of this protein will span the membrane twice, with both the N and C-termini in the cytoplasm.

(d)       None of the above.

Explanation / Answer

(b)       The C-terminus of this protein is cytoplasmic.

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