Q.29 The complete proteins produced by an organism at any one time is called:
- Transcriptome
- Proteome
- Lipidome
- Metagenome
Proteome is the correct answer. It refers to the complete set of proteins produced by an organism at any one time under specific conditions.
Option Explanations
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Transcriptome: This is the full set of RNA transcripts (like mRNA, rRNA, tRNA) produced by an organism at a given time, representing gene expression before translation into proteins.
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Proteome: Matches the question exactly, as it describes all proteins expressed by a genome in a cell, tissue, or organism at a specific moment, varying by cell type, stage, or environment.
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Lipidome: Covers the entire collection of lipids (fats and related molecules) in a cell or organism, unrelated to proteins.
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Metagenome: Represents the combined genomes of microbes in an environmental sample, not an organism’s proteins.
What is the Complete Proteins Produced by an Organism at Any One Time?
The complete proteins produced by an organism at any one time form the proteome, a dynamic snapshot of all proteins expressed under specific conditions like cell type or environment. This key concept in molecular biology helps explain how genomes translate into functional outputs, vital for exams like GATE Life Sciences.
Proteome Definition
The proteome includes every protein made by an organism’s cells at a given moment, reflecting gene activity and responding to factors like development or stress. Unlike the stable genome, it changes constantly, making proteomics the study of these proteins essential for disease research and drug discovery.
Why Not Transcriptome?
The transcriptome captures all RNA molecules from active genes but stops short of proteins—the proteome’s precursors. For instance, RNA transcripts guide protein synthesis, but only the proteome shows the final functional molecules.
Lipidome and Metagenome Differences
Lipidome tracks lipids for membrane and energy roles, while metagenome analyzes microbial DNA from samples, neither matching protein sets.
Term Definition Focus Key Difference from Proteome Proteome All proteins at one time Exact match Transcriptome All RNA transcripts Pre-protein stage Lipidome All lipids Fat molecules only Metagenome Microbial genomes Environmental DNA This distinction aids biology students in competitive prep, linking genome to phenotype via proteome.
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