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Semi-permeable membranes in the cell will let some molecules through but not others. There are three main ways in which these molecules can move. 1) Active transportAs the name suggests, here, molecules are ...

When a phagocyte recognises the antigens on a pathogen, it engulfs the pathogen. The pathogen becomes contained in a phagocytic vacuole. A lysosome fuses with the phagocytic vacuole and digestive enzymes (ly...

Linked genes are genes found on the same chromosome. Chromosomes are distinct 'sections' of DNA, and each gene in an organism has its own place on a chromosome. When genes are linked, it means that alleles (...

Schwann cells are found wrapped along the axons of some of the neurones of the peripheral nervous system (PNS).They secrete a lipid-based substance known as myelin, forming the myelin sheath. The myelin shea...

Both encase different type of cells however their compositions are distinct and because of this they have different functions and distributions across cell types. Structure and composition Cell membranes are...