In which type of Chromatography, the separation of Protein molecules is based on their size, shape and molecular weight?
**Core Concept**
The underlying principle being tested is the method of separating proteins based on their physical properties. **Size Exclusion Chromatography (SEC)** is a technique that separates molecules based on their size, shape, and molecular weight. This method is crucial in **biochemistry** and **molecular biology**.
**Why the Correct Answer is Right**
In **Size Exclusion Chromatography**, smaller molecules penetrate the beads in the stationary phase more easily than larger molecules, allowing for separation based on size. This technique is particularly useful for separating proteins, as it can distinguish between molecules of different **molecular weights**. The **stationary phase** consists of porous beads that act as a sieve, separating molecules based on their ability to enter the pores.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify a type of chromatography that separates molecules based on size and molecular weight.
**Option B:** This option is incorrect because it is not relevant to the separation of protein molecules based on size and molecular weight.
**Option C:** This option is incorrect because, although it may be related to chromatography, it does not specifically refer to the separation of proteins based on size, shape, and molecular weight.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that **Size Exclusion Chromatography** is often used in **protein purification** and **characterization**, making it a crucial technique in **biotechnology** and **pharmaceutical research**.
**Correct Answer:** D. Size Exclusion Chromatography.