Q.50 In analogy with central dogma of biology, how will you arrange the following omics in a correct sequence:

A. Metabolomics
B. Proteomics
C. Genomics
D. Transcriptomics
E. Phenotype or Phenomics

Choose the correct answer from the options given below:

1. B, C, D, E, A
2. C, B, D, A, E
3. C, D, B, A, E
4. C, E, B, A, D

   The central dogma of molecular biology (DNA → RNA → Protein → Phenotype) extends to omics levels as Genomics → Transcriptomics → Proteomics → Metabolomics → Phenomics/Phenotype.

   The correct sequence is C, D, B, A, E.

   Option Breakdown

   Each option tests alignment with the information flow from genome to observable traits.

   • B, C, D, E, A: Starts with Proteomics (wrong; proteins follow transcripts).

   • C, B, D, A, E: Genomics before Proteomics (skips Transcriptomics).

   • C, D, B, A, E: Correct—Genomics (DNA), Transcriptomics (RNA), Proteomics (proteins), Metabolomics (small molecules), Phenotype/Phenomics (traits).​

   • C, E, B, A, D: Places Phenotype too early (before proteins/metabolites).

   Omics Sequence Central Dogma Explained

   The omics sequence central dogma mirrors DNA → RNA → Protein → Metabolism → Traits, ranking high-throughput studies from genetic blueprint to cellular outcomes. Genomics (C) sequences DNA first, followed by Transcriptomics (D) for RNA expression, Proteomics (B) for proteins, Metabolomics (A) for metabolites, and Phenomics/Phenotype (E) for observable traits.

   Central Dogma Analogy Details

   This flow ensures systematic analysis: genomic variations drive transcript changes, which alter proteins, influencing metabolites and phenotypes.​

   Omics Level	Biological Analog	Role in Flow
   Genomics (C)	DNA	Genetic code origin.​
   Transcriptomics (D)	RNA	Gene expression readout.
   Proteomics (B)	Proteins	Functional molecules.​
   Metabolomics (A)	Metabolites	Biochemical products.
   Phenomics (E)	Phenotype	Final traits/outcomes.​

   Applications in Research

   Systems biology uses this omics sequence central dogma for integrative studies, like cancer genomics linking mutations to phenotypic drug response.​

   Exam Strategy

   For competitive exams, recall C-D-B-A-E as the unbreakable flow; mismatches like starting with B or E are traps.​