All are true about nohern blotting technique except
**Core Concept**
Northern blotting is a laboratory technique used to detect specific RNA molecules in a sample. It involves the separation of RNA molecules by size using electrophoresis, transfer of RNA to a membrane, and hybridization with a labeled probe to detect the target RNA sequence.
**Why the Correct Answer is Right**
The correct answer is [insert correct answer letter]. Northern blotting is a sensitive and specific technique for detecting specific RNA molecules in a sample. The technique involves the use of a labeled probe that is complementary to the target RNA sequence, which allows for the detection of the target RNA. The probe binds to the target RNA through hybridization, and the bound probe is then detected using a secondary antibody or chemiluminescence. This technique is commonly used in molecular biology research to study gene expression and regulation.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is not specific enough. While northern blotting does involve the use of a labeled probe, it is not the only technique that does so.
**Option B:** This option is incorrect because it is not a characteristic of northern blotting. Southern blotting, not northern blotting, is a technique used to detect specific DNA sequences.
**Option C:** This option is incorrect because it is not a characteristic of northern blotting. While northern blotting does involve the use of a membrane, it is not the only technique that does so.
**Option D:** This option is incorrect because it is not a characteristic of northern blotting. While northern blotting does involve the use of a labeled probe, it is not the only technique that does so.
**Clinical Pearl / High-Yield Fact**
A key difference between northern blotting and southern blotting is that northern blotting is used to detect RNA molecules, while southern blotting is used to detect DNA molecules. This is because RNA is typically more unstable and prone to degradation than DNA.
**Correct Answer:** B. Southern blotting is a technique used to detect specific DNA sequences, not RNA sequences.