Question

CRISPR-Cas 9 is a gene __________ technique.

• A. sequencing
• B. labelling
• C. editing
• D. locating

Hint:

Associate {CRISPR} with the concept of "molecular scissors" or a "find-and-replace" function for DNA. This directly points to its role in gene {editing}.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
The question asks to classify the CRISPR-Cas9 system based on its primary function in molecular biology.
Step 2: Detailed Explanation:
CRISPR-Cas9 is a revolutionary technology derived from a natural defense system in bacteria. It allows scientists to make precise changes to the DNA of living organisms.
The CRISPR part of the system acts as a guide RNA that can find and bind to a specific sequence of DNA.
The Cas9 part is a nuclease enzyme, often described as "molecular scissors," that cuts the DNA at the targeted location.
By cutting the DNA, the system allows scientists to remove, add, or alter specific DNA sequences. This process of making targeted changes to the genome is known as gene editing.
Sequencing refers to determining the exact order of nucleotides in a DNA molecule.
Labelling involves attaching a marker (like a fluorescent dye) to a molecule for detection.
Locating is part of the process, but the ultimate function is to alter the gene, not just find it.
Step 3: Final Answer:
CRISPR-Cas9 is a powerful gene editing technique.