A TI (tumour-inducing) plasmid is a type of circular DNA molecule found in certain strains of the bacterium Agrobacterium tumefaciens. It plays a crucial role in the bacterium’s ability to infect plants and transfer genes into them, causing the formation of crown gall tumours. TI plasmids have been extensively studied […]
Pyrimidine synthesis is a biochemical pathway to produce pyrimidine nucleotides, which are key components of DNA, RNA, and molecules like ATP and UTP. It involves a series of enzymatic reactions that convert precursor molecules into pyrimidines, such as cytosine, thymine, and uracil, essential for genetic and metabolic processes. This is […]
Purine synthesis is a biochemical pathway that cells use to produce purine nucleotides, the building blocks of DNA and RNA. It involves a series of enzymatic reactions that convert precursor molecules into purines, such as adenine and guanine. This pathway is essential for the synthesis of genetic material and various […]
A phase-contrast microscope is an optical instrument used in microscopy to enhance the contrast of transparent and translucent specimens, such as living cells, that are difficult to visualize using traditional bright-field microscopy. It accomplishes this by exploiting the differences in phase between light waves passing through different parts of the […]
The pH scale is a measure of the acidity or alkalinity of a substance, ranging from 0 (highly acidic) to 14 (highly alkaline), with 7 being neutral. It quantifies the concentration of hydrogen ions in a solution, where lower values indicate higher acidity and higher values indicate greater alkalinity. This […]