Question

Which of the following is not a bioinformatics tool ?

• A. BLAST
• B. ClustalW
• C. PCR
• D. Phylip

Hint:

To distinguish easily: if an entity is a physical, in-vitro biological process conducted in a test tube, it is a laboratory technique (like PCR, Western Blot, ELISA).
If it is a software, algorithm, or database running on a computer, it is a bioinformatics tool.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Bioinformatics is an interdisciplinary field that develops and uses computational software, tools, and databases to analyze, store, and organize large-scale biological data.
In contrast, molecular biology laboratory techniques are wet-lab experimental procedures carried out physically at the bench.

Step 2: Detailed Explanation:
Let us examine the nature of each option:
- BLAST:
As discussed, BLAST is a widely used computer program/algorithm for finding regions of similarity between biological sequences.
It is a fundamental computational bioinformatics tool.
- ClustalW:
ClustalW is a widely used general-purpose multiple sequence alignment program for DNA, RNA, or proteins.
It aligns multiple sequences computationally using progressive alignment algorithms, making it a key bioinformatics tool.
- PCR (Polymerase Chain Reaction):
PCR is a fundamental molecular biology laboratory technique used to enzymatically amplify a specific segment of DNA across several orders of magnitude, generating millions of copies of a particular DNA sequence.
It is conducted in a thermocycler machine using reagents like Taq polymerase, primers, dNTPs, and templates in a wet-lab environment.
It is not a computational or bioinformatics software tool.
- Phylip (Phylogeny Inference Package):
Phylip is a package of programs for inferring phylogenies (evolutionary trees) from biological data such as molecular sequences, gene frequencies, restriction sites, and distance matrices.
It is a classic bioinformatics software suite.

Step 3: Final Answer:
Therefore, PCR is not a bioinformatics tool.