221 results found

Search Results for: mechanism

Feedback mechanism

Feedback Mechanism Definition What is a feedback mechanism? A feedback mechanism is a physiological regulation system in a... Read More

Rolling circle mechanism

rolling circle mechanism (Science: molecular biology) A mechanism of dNA replication in many viral dNAs, in bacterial f... Read More

Mechanism

mechanism The manner of combination of parts, processes, etc., which subserve a common function. Origin: Gr. Mechan =... Read More

Actions of Caffeine in the Brain with Special Reference to Factors That Contribute to Its Widespread Use

IV. Actions of Caffeine on Brain Functions and Behavior Having discussed the molecular and neuronal actions of caffeine,... Read More

Physiological adaptation

If we look over evolutionary history, we find that it’s neither the most genius and intelligent nor the strongest and the... Read More

Homeostasis

Homeostasis is the tendency not to stray from the range of favorable or ideal internal conditions. Such conditions must be... Read More

Physiological Homeostasis

In animals such as ourselves, the internal environment of our bodies must have certain conditions within tolerable limits to... Read More

Interspecific competition

Interspecific Competition Definition In Biology, competition is defined as the process that occurs among species that have... Read More

How cell fixes DNA damage

DNA repair strategies DNA is crucial to life. It carries the fundamental blueprint for the proper functioning of a cell.... Read More

Parthenogenesis

To reproduce, by definition, means to produce new offspring. The process is referred to as reproduction, which is one of the... Read More

Homeostatic Mechanisms and Cellular Communication

Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory... Read More

Positive feedback

Positive Feedback Definition Each mechanism of the body like temperature, blood pressure, and levels of specific nutrients... Read More

Oxidation

Oxidation Definition How do we define oxidation? There are several definitions of the oxidation process. Oxidation can be... Read More

Negative feedback

Definition noun (1) A feedback in which the system responds to the perturbation in the opposite direction as the... Read More

A Look Into Natural Selection and its Mechanisms

Charles Darwin is credited with outlining the fundamentals of evolution. He was a smart and eager pupil and protégé,... Read More

Group translocation

Group Translocation Definition Just like your “home” is a private place where you and your comfort are maintained due... Read More

Phosphodiester bond

Phosphodiester Bond Definition Phosphodiester bonds are the backbone of the strands of nucleic acid present in the life... Read More

Chemiosmosis

Chemiosmosis Definition What is chemiosmosis? In biology, chemiosmosis refers to the process of moving ions (e.g. protons)... Read More

Mutagen

Mutagen Definition What is a mutagen? A mutagen is a substance or agent that causes DNA impairment that results in the... Read More

Sympatric speciation

Speciation is a process of evolution through which two different existing populations evolve and a distinct species form. It... Read More

Pathobiology of allergy and its most severe form, anaphylaxis

When allergy season looms, some people with serious hypersensitivity to allergens tend to be apprehensive of what may come.... Read More

Ligase

An enzyme is a catalyst or a chemical produced by cells to speed up a biochemical reaction. It is usually a protein molecule... Read More

Centrosome

Centrosome Definition What is a centrosome? The centrosome is considered to be the main microtubule-organizing... Read More

Gap 2-M DNA damage checkpoint

Definition noun (cell biology) A control mechanism in G2 phase of the cell cycle that ensures the cell is ready for cell... Read More

Phosphorylation

Phosphorylation Definition We can define phosphorylation as a biochemical process in which a phosphate molecule is added to... Read More

Molecular Basis of Temperature-Dependent Gender of Red-Eared Slider Turtle

Imagine a child inside a womb with a sex yet to be decided not by the pair of sex chromosomes but by the ambient temperature... Read More

Autotomy

Definition noun (1) (zoology) The intentional separation of a body part, usually as a protective evading mechanism against... Read More

Circulation

Blood Blood is composed of a liquid, plasma, and blood cells such as erythrocytes (red blood cells,) leukocytes (white... Read More

Apparent competition

Competition Definition One of the many branches of biology is ecology. Ecology is the study of the relationships that the... Read More

Carbon fixation

Carbon Fixation Definition We know that the earth contains many elements. The periodic table shows us just how many... Read More

Obligate aerobe

Before we define obligate aerobes, let us first understand and define aerobic organisms. Aerobic organisms are those that... Read More

Light-dependent reaction

Many organisms, such as green plants, convert light energy into chemical energy through the mechanism of photosynthesis. In... Read More

Glucose

Glucose occurs naturally and is ubiquitous. It is one of the three most common monosaccharides; the other two are fructose... Read More

Concentration gradient

Concentration gradient definition Concentration gradient refers to the gradual change in the concentration of solutes in a... Read More

Chromatin

Chromatin Definition What is chromatin in a cell? Chromatin is a complex of nucleic acids (e.g. DNA or RNA) and proteins... Read More

Primary cell wall

Definition noun plural: primary cell walls ˈpɹaɪməɹi sɛl wɔːl The layer of the plant cell wall that forms prior to... Read More

Endocytosis

Endocytosis Definition What is endocytosis in biology? Endocytosis is a cellular process by which a cell internalizes any... Read More

Pathogenicity

Definition noun, plural: pathogenicities The capability (of a pathogenic agent) to cause disease Supplement Pathogenicity... Read More

Neuroethology

Definition noun A discipline that deals with the scientific study of the neural basis of natural animal... Read More

Predation

In ecology, predation is a mechanism of population control. Thus, when the number of predators is scarce the number of... Read More