In cell biology, understanding cellular systems requires analyzing the different levels of molecular organization. What is the definition of a cell's metabolome?
The complete set of low-molecular-weight metabolites (such as metabolic intermediates, hormones, and signaling molecules) found within a biological sample, cell, or organism at a given time.
The total complement of structural lipids and membrane carbohydrates synthesized by the smooth endoplasmic reticulum to maintain organelle membrane integrity.
The total kinetic energy and thermodynamic enthalpy generated by all enzyme-catalyzed catabolic and anabolic pathways operating inside the cell.
The entire set of functional enzymes and carrier proteins that catalyze metabolic pathways and regulate nutrient transport across cell membranes.
72 exam-style questions on OCR GCSE Biology 1.2 What happens in cells (and what do cells need)?, covering 1.2.1 Structure of DNA, 1.2.2 Nucleotides and complementary bases, 1.2.3 Protein synthesis, 1.2.4 DNA structure and the proteins made, 1.2.5 Investigating enzymatic reactions, and 1.2.6 Mechanism of enzyme action. Each one has a worked solution and a mark scheme showing where the marks go.