Amphipathy means

Options

A. presence of polar and non polar end in same molecule
B. water containing land habitat
C. presence of dipolar Zwitter ions
D. all wrong.

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Amphipathy":**
- Amphipathy is a term used to describe a specific characteristic of certain molecules. It refers to the presence of both polar and non-polar parts within the same molecule.

2. **Defining Polar and Non-Polar:**
- Polar molecules have regions with a slight charge, which makes them hydrophilic (water-loving). They can interact well with water.
- Non-polar molecules do not have charged regions, making them hydrophobic (water-fearing). They do not interact well with water.

3. **Examples of Amphipathic Molecules:**
- A classic example of an amphipathic molecule is a phospholipid. In a phospholipid:
- There is a hydrophilic (water-loving) head.
- There are two hydrophobic (water-fearing) tails.

4. **Application in Biological Systems:**
- Amphipathic molecules are crucial in biological systems, particularly in the formation of cell membranes. The phospholipid bilayer of cell membranes is formed due to the amphipathic nature of phospholipids, where the hydrophilic heads face the aqueous environment, and the hydrophobic tails face each other, away from water.

5. **Identifying the Correct Option:**
- Given the options, the correct definition of amphipathy is: "presence of polar and non-polar end in the same molecule." This aligns with our understanding of the term.

**Final Answer:**
Amphipathy means the presence of both polar and non-polar ends in the same molecule.

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