Table of Contents Polynucleotide Definition The polynucleotide is a polymer of nucleotides. It comprises a long, linear series of nucleotides that are linked together with ester linkages. The bond formed…
Table of Contents Simple Diffusion Definition Simple diffusion does not require the aid of membrane proteins. Substances move from higher concentrations to lower concentrations at the cellular level. However, its…
Table of Contents Isotonic Solution Definition The term “isotonic” is used in physiology, anatomy as well as in physical chemistry. In physical chemistry, isotonic solutions are those that have equivalent…
Table of Contents Active Transport Definition In active transport, substances move across a membrane against a concentration gradient. This means that the direction of flow is from an area of…
Table of Contents Nucleus Definition Nucleus is an organelle floating in the cellular cytoplasm which contains chromosomes. Anucleate cells are the ones that lack a nucleus. Apart from this, nucleus…
Zwitterion Definition A molecule that carries both a positive as well as a negative charge What is Zwitterion? Zwitterion comprises two (or more) functional groups. One of the functional groups…
Table of Contents Trophic Level Definition A trophic level refers to a position in an ecological pyramid, food chain, or food web. . Each trophic level is occupied by a…
Table of Contents Heterotroph Definition A heterotroph is an organism that eats other plants or animals for energy and nutrients. The term stems from the Greek words hetero for “other”…
Gluconeogenesis Definition The metabolic process in which non-carbohydrate precursors are transformed into glucose. Glucose which is the most widely used aldohexose is required to carry vital biochemical functions in a…
Table of Contents Chloroplast Definition Chloroplast is an organelle found in the cell of photosynthetic eukaryotes that is filled with the green pigment called ‘chlorophyll’. The word chloroplast is derived…
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