Question

A protein that is destined to be secreted from the cell has a signal sequence that targets it to the plasma membrane
- is targeted to the RER as a soluble protein.
- is made solely by ribosomes free in the cytosol.
- is targeted directly to lysosomes.
- has a signal sequence that targets its translation into the lumen of the RER.

Answer 1

Answer:

A protein that is destined to be secreted from the cell:

- is targeted to the RER as a soluble protein.

Explanation:

The main function of the RER is the synthesis and transport of secretion or membrane proteins.

If you are looking for the RER you could fount it on eukaryotic cells, side by side of the nucleus, and cover in ribosomes.

Answer 2

A protein that is destined to be secreted from the cell has a signal sequence that targets its translation into the lumen of the RER.

What is the RER?

The rough endoplasmic reticulum (RER) is an organelle found in eukaryotic cells composed of a  series of connected flattened sacs.

• This organelle (rough endoplasmic reticulum) is responsible for the production of many different types of proteins.

• Proteins that do not contain a signal peptide are known to stay in the cytosol of the cell.

In conclusion, a protein that is destined to be secreted from the cell has a signal sequence that targets its translation into the lumen of the RER.

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