Question

During translation, the new polypeptides are often directed to specific parts of the cell by the presence or absence of short sequences of amino acids called signal sequences. Which peptides would you expect to find in the polypeptide that will eventually fold to become an ion channel protein? Select all that apply. a signal-anchor peptide an internal signal peptide no signal peptide an amino-terminal signal peptide

Answer 1

Answer:

The best answers to your question, as per the immense amount of research on the topic, would be: The peptides that you would expect to find in the polypeptide that will eventually fold to become an ion channel protein, would be: 1. A signal-anchor peptide, 2. an internal signal peptide and an amino-terminal signal peptide.

Explanation:

Ion channels are transmembrane proteins whose main purpose is to serve as pathways through which different ions, like potassium, or sodium, can cross from both the inside and outside of the cell as it may be required in different circumstances. These proteins, unlike many others, are first translated from genetic material in the cytosol, and then, thanks to signaling sequences on their chain, they will be taken to the ER and Golgi apparatus, where the rest of the translation and the final packaging will be arranged, so that they may be shipped towards their destination, which is the plasma membrane. These proteins, because of their function, need to have a signal-anchor peptide, an internal signal peptide which will direct them to the ER for final assembly and packaging and an amino-terminal signal peptide.

Answer 2

an internal signal peptide

Polypeptides

• Polypeptides aid in the formation of proteins by linking together several amino acids.
• During translation, the presence or lack of short sequences of amino acids known as signal sequences generally directs new polypeptides to specific areas of the cell. The polypeptide that will eventually fold into an ion channel protein contains an internal signal peptide.
• Proteins are formed by the bonding of two or more polypeptides, which are then folded into a specific shape for the protein.

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