What type of amino acids would you expect to find in a Na+ ion channel?

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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**Understanding Protein Structures and Ion Channels**

Proteins fold into complex three-dimensional shapes. The function is dependent upon the structure of the protein and its cellular location. The final shape of the protein is based on the identity of the amino acid side chains of the protein.

Some proteins form ion channels that allow the passage of ions through the cell membrane.

**Question:**
What type of amino acids would you expect to find in a Na⁺ ion channel?

**Options:**
- A) nonpolar
- B) polar neutral
- C) polar acidic
- D) polar basic
- E) any of the polar side chains

The correct answer is "B) polar neutral" (highlighted in green).

**Explanation:**
Ion channels are crucial for regulating the movement of ions across the cell membrane. Sodium ions (Na⁺) typically interact with polar neutral amino acid side chains within the ion channel, facilitating their movement through the membrane. This question tests knowledge of protein structure, specifically the chemical nature of amino acids in ion channels.
Transcribed Image Text:**Understanding Protein Structures and Ion Channels** Proteins fold into complex three-dimensional shapes. The function is dependent upon the structure of the protein and its cellular location. The final shape of the protein is based on the identity of the amino acid side chains of the protein. Some proteins form ion channels that allow the passage of ions through the cell membrane. **Question:** What type of amino acids would you expect to find in a Na⁺ ion channel? **Options:** - A) nonpolar - B) polar neutral - C) polar acidic - D) polar basic - E) any of the polar side chains The correct answer is "B) polar neutral" (highlighted in green). **Explanation:** Ion channels are crucial for regulating the movement of ions across the cell membrane. Sodium ions (Na⁺) typically interact with polar neutral amino acid side chains within the ion channel, facilitating their movement through the membrane. This question tests knowledge of protein structure, specifically the chemical nature of amino acids in ion channels.
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