Biology glossary

Helicase

A helicase is an enzyme capable of separating the two strands of a DNA molecule.It works by breaking the weak bonds that hold together the complementary bases of the double helix.This opening of the DNA is essential before replication, …

Biologie moléculaire

Red blood cell

A red blood cell, also called an erythrocyte, is a blood cell specialized in transporting respiratory gases.It contains a large amount of hemoglobin, a protein mainly able to bind oxygen in the lungs and release it in the organs.In huma…

Système cardiovasculaire

Heterozygote

An individual is heterozygous for a gene when they have two different alleles of that gene, one inherited from each parent.If one allele is dominant and the other is recessive, the trait associated with the dominant allele generally app…

Génétique

Homozygote

An individual is homozygous for a gene when they have two identical alleles of that gene, one inherited from their mother and the other from their father.For example, they may have two dominant alleles or two recessive alleles.In this c…

Génétique

Hormone

A hormone is a molecule produced by a gland or an organ in the body, released into the blood, and acts as a chemical messenger.It transmits information to other parts of the body to regulate important functions such as growth, reproduct…

Système endocrinien

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