This page contains all posts in the Cell Biology category.
Cell junctions explained through their three jobs: tight junctions seal, anchoring junctions fasten, and gap junctions communicate. Their types, structure, and functions, the plant plasmodesmata, and clear tight-versus-gap and plant-versus-animal comparisons, with exam notes.
The endoplasmic reticulum explained: rough ER (with ribosomes) versus smooth ER, their structure and division of labor in protein and lipid synthesis, discovery, location, and the...
The cytoskeleton explained through its three components: microfilaments (actin), intermediate filaments, and microtubules. Their structure, sizes, and functions in cell shape, move...
The centriole explained: its barrel of nine microtubule triplets (the 9+0 arrangement), why it has no membrane or DNA, how it forms the centrosome and the spindle poles, its role i...
Peroxisome structure and function explained: the catalase and oxidase enzymes, how it handles hydrogen peroxide and very-long-chain fatty acids, how it differs from the lysosome, a...
Vacuole structure and function explained: the tonoplast membrane, cell sap, the central vacuole and turgor pressure, and the types of vacuole (food, contractile, gas, and lytic), w...
Cytoplasm explained as a foundation for cell biology: its four components (cytosol, organelles, cytoskeleton, inclusions), its functions, and the clear difference between cytoplasm...
Lysosome structure, its acid hydrolase enzymes, how it forms from the Golgi, autophagy and the "suicide bag" concept, and the lysosomal storage diseases (Tay-Sachs, Gaucher, Pompe,...
The Golgi apparatus explained as the cell's processing and shipping center: its cisternae, cis and trans faces, and how it modifies, sorts, and packages proteins and lipids from th...
Cell membrane structure and function explained through its three historical models: the Danielli-Davson sandwich model, Robertson's unit membrane model, and the Singer-Nicolson flu...
Every part of a plant cell explained simply, what each one does, how a plant cell differs from an animal cell, and easy ways to remember them for your exam.
Nucleus structure and function explained part by part: nuclear envelope, nuclear pores, nucleoplasm, chromatin, and nucleolus. With a labeled diagram, discovery history, and exam n...
Mitosis and meiosis explained simply: every stage in order, the key differences in one table, which phase is longest and shortest, and memory tricks for your exam.
Plant and animal cells are both eukaryotic, so they share a lot. Here are their key similarities and differences, why they share them, and a clear comparison.
Animal cell explained simply: every organelle, what it does, how the parts work together, and memory tricks to recall them for your exam.
