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Liste de Mots Niveau C2 - Biology

Ici, vous apprendrez tous les mots essentiels pour parler de biologie, spécialement rassemblés pour les apprenants de niveau C2.

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CEFR C2 Vocabulary

a tiny structure within cells that assembles proteins by reading the genetic instructions carried by messenger RNA

ribosome

ribosome

Ex: The process of translation , where genetic instructions in mRNA are converted into proteins , occurs on ribosomes.Le processus de traduction, où les instructions génétiques dans l'ARNm sont converties en protéines, se produit sur les **ribosomes**.

a cellular organelle involved in the processing, packaging, and distribution of proteins and lipids within the cell, consisting of a stack of flattened membrane sacs called cisternae

Appareil de Golgi, Complexe de Golgi

Appareil de Golgi, Complexe de Golgi

Ex: The Golgi apparatus is involved in the formation of vesicles that transport materials within the cell or to the cell membrane .L'**appareil de Golgi** est impliqué dans la formation de vésicules qui transportent des matériaux à l'intérieur de la cellule ou vers la membrane cellulaire.

a small, enzyme-filled sac in a cell that breaks down waste materials and unwanted substances

lysosome, vésicule enzymatique

lysosome, vésicule enzymatique

Ex: During apoptosis (programmed cell death), lysosomes release enzymes that contribute to the breakdown of cellular components.Pendant l'apoptose (mort cellulaire programmée), les **lysosomes** libèrent des enzymes qui contribuent à la dégradation des composants cellulaires.

an organelle that is abundantly present in most cells and is responsible for energy production

mitochondrie

mitochondrie

Ex: Mitochondria contain their own DNA, separate from the nuclear DNA, which is essential for their function and replication.Les **mitochondries** contiennent leur propre ADN, distinct de l'ADN nucléaire, ce qui est essentiel pour leur fonction et leur réplication.

a plant cell organelle that uses sunlight to produce energy and make glucose through photosynthesis

chloroplaste, organite photosynthétique

chloroplaste, organite photosynthétique

Ex: The unique DNA within chloroplasts supports the idea that they originated from ancient symbiotic bacteria that formed a mutually beneficial relationship with plant ancestors .L'ADN unique des **chloroplastes** soutient l'idée qu'ils proviennent de bactéries symbiotiques anciennes qui ont formé une relation mutuellement bénéfique avec les ancêtres des plantes.

a molecule that forms the basic building block of DNA and RNA, consisting of a sugar, a phosphate group, and a nitrogenous base

nucléotide

nucléotide

Ex: Mutations can occur when the sequence of nucleotides in DNA is altered .Les mutations peuvent se produire lorsque la séquence des **nucléotides** dans l'ADN est modifiée.

a linear chain of amino acids linked by peptide bonds, forming a primary structure of a protein

polypeptide, chaîne polypeptidique

polypeptide, chaîne polypeptidique

Ex: Collagen , providing structural support to tissues like skin and tendons , is a fibrous polypeptide.Le collagène, qui fournit un soutien structurel aux tissus comme la peau et les tendons, est un **polypeptide** fibreux.

a specialized, membrane-bound structure within a cell that performs specific functions, contributing to the cell's overall structure and function

organite, organelle

organite, organelle

Ex: Vacuoles , storage organelles, hold nutrients , waste products , or pigments in plant cells .Les **organites** de stockage, les vacuoles, contiennent des nutriments, des déchets ou des pigments dans les cellules végétales.
vacuole
[nom]

a cell organelle in plants, fungi, and some protists that stores nutrients, manages waste, and helps maintain cell pressure

vacuole, vésicule

vacuole, vésicule

Ex: The size and contents of vacuoles can change dynamically in response to cellular needs and environmental conditions .La taille et le contenu des **vacuoles** peuvent changer dynamiquement en réponse aux besoins cellulaires et aux conditions environnementales.

a pair of small cylinders near the nucleus in animal cells, organizing cell division by forming the mitotic spindle

centriole, paire de centrioles

centriole, paire de centrioles

Ex: Abnormalities in centriole structure or function can lead to cell division and developmental issues .Les anomalies dans la structure ou la fonction du **centriole** peuvent entraîner des problèmes de division cellulaire et de développement.
histone
[nom]

a type of protein that plays a structural role in the packaging of DNA into nucleosomes, fundamental units of chromatin

histone, protéine histone

histone, protéine histone

Ex: Changes in histone structure can influence the three-dimensional organization of the genome .Les changements dans la structure des **histones** peuvent influencer l'organisation tridimensionnelle du génome.

a repetitive DNA sequence at the end of a linear chromosome, protecting it from deterioration during replication, and playing a role in cellular aging and cancer development

télomère, extrémité chromosomique

télomère, extrémité chromosomique

Ex: The telomere's repetitive sequence , TTAGGG in humans , prevents the loss of essential genetic information with each round of cell division .La séquence répétitive du **télomère**, TTAGGG chez l'homme, empêche la perte d'informations génétiques essentielles à chaque cycle de division cellulaire.

the observable physical and behavioral characteristics of an organism, resulting from the interaction of its genotype (genetic makeup) with the environment

phénotype, caractéristiques observables

phénotype, caractéristiques observables

Ex: Inherited traits , such as freckles or dimples , contribute to an individual 's phenotype.Les traits hérités, tels que les taches de rousseur ou les fossettes, contribuent au **phénotype** d'un individu.

the tendency of an organism or cell to regulate its internal environment and maintain a stable, balanced condition, despite external changes

homéostasie, équilibre interne

homéostasie, équilibre interne

Ex: The release of hormones like adrenaline during stress is part of the body 's response to maintain homeostasis in challenging situations .La libération d'hormones comme l'adrénaline pendant le stress fait partie de la réponse de l'organisme pour maintenir l'**homéostasie** dans des situations difficiles.

the process by which the information encoded in the sequence of nucleotides in DNA is converted into a functional product, typically a protein

traduction, traduction génétique

traduction, traduction génétique

Ex: Various enzymes and initiation factors are involved in the regulation and control of translation.Diverses enzymes et facteurs d'initiation sont impliqués dans la régulation et le contrôle de la **traduction**.

the process by which a segment of DNA is used as a template to synthesize a complementary RNA molecule

transcription, la transcription

transcription, la transcription

Ex: The template ( antisense ) strand of DNA serves as a guide for RNA synthesis during transcription.Le brin matrice (antisens) de l'ADN sert de guide pour la synthèse d'ARN pendant la **transcription**.

the process by which an organism duplicates its genetic material, particularly the copying of DNA in cell division

réplication

réplication

Ex: Errors during DNA replication are corrected by proofreading mechanisms to maintain genetic fidelity .Les erreurs lors de la **réplication** de l'ADN sont corrigées par des mécanismes de relecture pour maintenir la fidélité génétique.
codon
[nom]

a sequence of three adjacent nucleotides in mRNA that codes for a specific amino acid during protein synthesis or serves as a start or stop signal in the translation process

codon, séquence codonique

codon, séquence codonique

Ex: UGA , UAA , and UAG are stop codons, signaling the end of protein synthesis .UGA, UAA et UAG sont des **codons** stop, signalant la fin de la synthèse des protéines.

a close and often long-term interaction between two different species living in close physical association, typically to the advantage of both

symbiose

symbiose

Ex: The coral reefs showcase a remarkable example of symbiosis, where corals and algae live together , with corals providing shelter and nutrients while algae provide food through photosynthesis .Les récifs coralliens présentent un exemple remarquable de **symbiose**, où les coraux et les algues vivent ensemble, les coraux fournissant un abri et des nutriments tandis que les algues fournissent de la nourriture par photosynthèse.
ameba
[nom]

a single-celled, microscopic organism belonging to the group of protozoa, characterized by a flexible cell membrane and the absence of a fixed body shape

amibe, amibes

amibe, amibes

Ex: Amebas play a role in nutrient cycling by consuming bacteria and organic matter in their habitats.Les **amibes** jouent un rôle dans le cycle des nutriments en consommant des bactéries et de la matière organique dans leurs habitats.

a simple, single-celled organism that lacks a true nucleus and membrane-bound organelles, such as bacteria and archaea

procaryote, organisme procaryote

procaryote, organisme procaryote

Ex: Many diseases , like strep throat , are caused by pathogenic prokaryotes.De nombreuses maladies, comme l'angine streptococcique, sont causées par des **procaryotes** pathogènes.

a green pigment found in all green plants and cyanobacteria that is responsible for the absorption of the sunlight needed for the photosynthesis process

chlorophylle

chlorophylle

Ex: Algae and cyanobacteria also contain chlorophyll, allowing them to carry out oxygenic photosynthesis .Les algues et les cyanobactéries contiennent également de la **chlorophylle**, ce qui leur permet de réaliser la photosynthèse oxygénique.
capsid
[nom]

the protein coat of a virus that encases its genetic material and helps it attach to and enter host cells during infection

la capside, l'enveloppe protéique

la capside, l'enveloppe protéique

Ex: Understanding the structure and function of viral capsids is essential for developing antiviral strategies and vaccines .Comprendre la structure et la fonction des **capsides** virales est essentiel pour développer des stratégies antivirales et des vaccins.

a type of living thing with cells that have a nucleus and other structures enclosed in membranes, like plants, animals, fungi, and some microorganisms

eucaryote, organisme eucaryote

eucaryote, organisme eucaryote

Ex: Seaweeds, with their diverse forms, are eukaryotic algae found in marine ecosystems.Les algues marines, avec leurs formes diverses, sont des algues **eucaryotes** trouvées dans les écosystèmes marins.
ovum
[nom]

a mature, female reproductive cell or egg, typically larger than a sperm cell, capable of fusing with a sperm cell during fertilization to form a zygote

ovule, œuf

ovule, œuf

Ex: Scientists study the ovum to better understand reproductive biology and improve fertility treatments .Les scientifiques étudient l'**ovule** pour mieux comprendre la biologie de la reproduction et améliorer les traitements de fertilité.
pepsin
[nom]

an enzyme produced in the stomach that helps in the digestion of proteins by breaking them down into smaller peptides

pepsine, enzyme pepsique

pepsine, enzyme pepsique

Ex: Excessive production of pepsin can contribute to conditions such as gastritis and peptic ulcers .Une production excessive de **pepsine** peut contribuer à des affections telles que la gastrite et les ulcères peptiques.

a molecule that carries energy within cells, composed of adenine, a ribose sugar, and three phosphate groups

adénosine triphosphate, triphosphate d'adénosine

adénosine triphosphate, triphosphate d'adénosine

Ex: Adenosine triphosphate is a transient molecule , continuously being generated and used within cells .L'**adénosine triphosphate** est une molécule transitoire, continuellement générée et utilisée dans les cellules.
biogas
[nom]

a gas, especially methane, that is produced as a result of the decomposition of animal or plant remains, which is used as fuel

biogaz

biogaz

Ex: Engineers are working on optimizing the biogas production process to increase the yield and reduce the costs of renewable energy .Les ingénieurs travaillent à optimiser le processus de production de **biogaz** pour augmenter le rendement et réduire les coûts de l'énergie renouvelable.

a network of protein fibers in a cell that gives it shape, supports its structure, and aids in movement

cytosquelette, squelette cellulaire

cytosquelette, squelette cellulaire

Ex: The cytoskeleton is crucial for maintaining cell polarity , ensuring proper organization and function .Le **cytosquelette** est crucial pour maintenir la polarité cellulaire, en assurant une organisation et une fonction appropriées.
Liste de Mots Niveau C2
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