Science

Solenoid Model

The solenoid model illustrates the packaging or folding of DNA within the eukaryotic cell nucleus. It was first introduced by the scientist’s John Finch and Aaron Klug in the year 1976. In eukaryotes, the DNA is organized compactly due to the association of bead-like histone octamer and linker histones. Oppositely, the DNA content in prokaryotes …

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Plant Cell Nucleus

A plant cell nucleus is a specialized structure, which stores genetic information and monitors cellular activities. Plants are monokaryotic cells, which possess an individual nucleus. A well-developed nucleus is only found in the advanced or multicellular organisms, those having division of labour. Nucleus presence is a prominent feature in plant cells, as it plays a …

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Sense of Smell

Sense of smell is one of the senses processed by our nervous system to let us know more about our surroundings and the things we consume to keep the body healthy and safe. The sense of smell is a set of information coming through the nose. The sensory organ comprises specialized cells and tissues that …

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Difference Between Photosystem I and Photosystem II

The difference between photosystem I and photosystem II is primarily due to the difference in active reaction centre and photon absorption. P700 is the active reaction centre of PS-I, while P680 is the active reaction centre of PS-II. PS-I absorbs light of a longer wavelength (between 725-1035 nm), while PS-II absorbs light of a shorter …

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Nitrification

Nitrification is one of the crucial steps in the nitrogen cycle that occurs in soil. It is an aerobic process that involves two successive oxidation reactions, in which the ammonia first oxidizes into nitrites, and then nitrites get oxidized into nitrates. It occurs in the soil and includes members of autotrophic bacteria and archaea. The …

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Difference Between Unicellular and Multicellular Organisms

The difference between unicellular and multicellular organisms is primarily due to cell composition, function, and arrangement. Unicellular organisms exist as an individual cell, whereas multicellular organisms possess a group of specialized cells. Unicellular organisms mediate all their cellular activities by a single cell itself, while multicellular organisms perform specific cell activities through their specialized or …

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