Question

Which of the following is not a bioinformatics tool ?

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

Hint:

- Bioinformatics tools = Software/In-silico programs (e.g., BLAST, ClustalW, PHYLIP, PyMOL).
- Laboratory techniques = In-vitro/Wet-lab processes (e.g., PCR, ELISA, Western Blot, Gel Electrophoresis).

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Bioinformatics tools are computational software programs, algorithms, or databases used to analyze and interpret large-scale biological data, such as genomic, proteomic, and transcriptomic datasets.
In contrast, molecular biology techniques are experimental, wet-lab procedures conducted using physical instruments and chemical reagents.

Step 2: Detailed Explanation:
Let us evaluate each option based on whether it is a computer-based program or a physical wet-lab technique:
- BLAST:
As discussed, BLAST is a major computer program used to compare sequence similarities across genomic databases, making it a bioinformatics tool.
- ClustalW:
ClustalW is a widely used, general-purpose multiple sequence alignment program for DNA, RNA, and protein sequences.
It operates as a software package, making it a key bioinformatics tool.
- PCR (Polymerase Chain Reaction):
PCR is a biochemical, molecular biology laboratory technique used to enzymatically amplify specific segments of DNA in vitro, producing millions of copies of a target sequence.
It is conducted physically using a thermal cycler, DNA polymerases, primers, and dNTPs in a wet-lab environment.
It is not a computational bioinformatics software tool.
- Phylip (Phylogeny Inference Package):
Phylip is a comprehensive, classic package of programs for inferring evolutionary trees (phylogenies) from molecular sequence data, making it a bioinformatics software tool.

Step 3: Final Answer:
The correct option is (C), as PCR is a molecular biology laboratory technique and not a bioinformatics tool.