Which of the following can be used as test for lipid peroxidation?
**Core Concept**
Lipid peroxidation is a process in which free radicals attack lipids containing carbon-carbon double bond(s), especially polyunsaturated fatty acids (PUFAs), leading to cell damage. This process is often used as an indicator of oxidative stress in cells. **Malondialdehyde (MDA)** is a common marker used to measure lipid peroxidation.
**Why the Correct Answer is Right**
The correct answer is related to the measurement of **MDA**, which is a naturally occurring product formed during the lipid peroxidation process. **Thiobarbituric acid (TBA)** reacts with **MDA** to form a thiobarbituric acid-reactive substance (TBARS), which can be quantified spectrophotometrically. This reaction is the basis for the **thiobarbituric acid test**, a commonly used assay for lipid peroxidation.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is not directly related to the measurement of lipid peroxidation.
**Option B:** Similarly, this option does not accurately reflect a test for lipid peroxidation.
**Option C:** This option is also incorrect as it does not pertain to the assessment of lipid peroxidation.
**Clinical Pearl / High-Yield Fact**
Lipid peroxidation is an important marker of oxidative stress and can be used to assess the level of cell damage in various diseases. The **thiobarbituric acid test** is a simple and commonly used method for measuring lipid peroxidation.
**Correct Answer:** D. Thiobarbituric acid test.