Question 2:
The science of collecting small molecules in a given cell under a specific set of conditions is called:
Metabolomics: The Science of Studying Small Molecules in Cells
The correct answer to the question is (D) Metabolomics. This field specifically involves collecting and analyzing small molecules, known as metabolites, within a cell under defined conditions.
Correct Answer
Metabolomics is the systematic study of small-molecule metabolites—such as amino acids, lipids, carbohydrates, and other intermediates or products of metabolism—in a cell, tissue, or organism under particular conditions. It captures a dynamic snapshot of cellular metabolism, reflecting what has actually happened in biological processes.
Option Breakdown
Proteomics
Proteomics focuses on the large-scale study of proteins, including their structures, functions, interactions, abundances, and modifications across cells or tissues. Unlike small molecules, proteins are macromolecules derived from gene expression, making this option incorrect for metabolite collection.
Transcriptomics
Transcriptomics examines RNA transcripts, primarily mRNA, to understand gene expression patterns at a given time or condition. It deals with nucleic acids, not small molecules, so it does not match the description.
Lipidomics
Lipidomics is a targeted subset of metabolomics that profiles lipids specifically, such as fatty acids and phospholipids. While it involves small molecules, it is narrower than the general collection of all small metabolites, ruling it out.
Metabolomics (Correct)
This is the precise match: the comprehensive analysis of all small molecules (<1.5 kDa) in a cell under specific conditions, providing insights into metabolic states, disease, or environmental responses. Techniques like mass spectrometry enable this metabolite profiling.
