75 results found

Search Results for: structural gene

Structural gene

Definition noun, plural: Structural genes Any of the genes coding for the production of a specific RNA, structural... Read More

Definition

Epistasis

Epistasis Definition What is epistasis in genetics? How does epistasis occur? The epistasis definition, in biology, refers... Read More

Definition

Gene

A gene is the fundamental, physical, and functional unit of heredity. The genes make up the sequences of DNA (genotypes).... Read More

Schematic diagram of bacterial lactose operon

Tutorial

Gene Action – Operon Hypothesis

Reviewed by: Mary Anne Clark, Ph.D.Some genes are switched on or off depending on environmental conditions. The... Read More

Definition

Y chromosome

Y chromosome Definition The Y chromosome constitutes one member of the pair of sex chromosomes within an organism, a common... Read More

Definition

Silent mutation

A mutation is a change in the nucleotide sequence of a gene or a chromosome. When there is only one nucleotide involved, it... Read More

Definition

Nucleosome

Nucleosome Definition Every organism is made of deoxyribonucleic acid, also known as DNA. DNA is made up of numerous... Read More

Definition

Genome

Genome Definition What is a genome? As defined in biology, a genome is a complete set of deoxyribonucleic acid (DNA) within... Read More

Definition

Dominant

Dominant Definition The word dominant or dominant trait is commonly used in biology. The general meaning of dominant is to... Read More

Definition

Fibroblast

The building block of living things is known as the cell. The cell contributes to many parts and functions of different... Read More

Definition

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

Definition

Mutation

A mutation is a permanent, heritable change in the nucleotide sequence or the process by which such a change occurs in a... Read More

Definition

Keratin

Keratin is a fibrous protein naturally present in hair, skin, and nails. In hair care, it serves as a protective and... Read More

Definition

Biology

Biology Definition Biology is the branch of science that primarily deals with the structure, function, growth, evolution,... Read More

Definition

Glucose

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

Definition

Epidermis

Epidermis Definition What is the epidermis? We can define the epidermis as one or more layers of cells forming the tough... Read More

Definition

Homology

In biology, homology refers to similarities caused by shared ancestry between two structures or genes from distinct species.... Read More

Definition

Nucleus

In cell biology, the nucleus is the large, membrane-bounded organelle that contains the genetic material in the form of... Read More

Definition

Euchromatin

Definition noun A slightly packed or partially condensed form of chromatin that contains structural genes and is usually... Read More

Definition

Flagellum

Flagellum Definition Flagellum is a slender, hair-like structure composed of a complex arrangement of multiple proteins,... Read More

Tutorial

Genetic Information and Protein Synthesis

Genetic Code Genes are sequences of DNA nucleotides that carry and transmit the information specifying amino acid sequences... Read More

Definition

Organelle

The cell is regarded as the structural, functional, and biological unit of all organisms. It is a membrane-bound structure... Read More

Definition

Thermophile

Thermophiles Definition What are thermophiles? Let us first understand the literal meaning of the word ‘thermophile’.... Read More

Definition

Animal cell

An animal cell is the fundamental functional unit of life of animals. It is also the basic unit of reproduction. Animal... Read More

Definition

Cell adhesion

Cell Adhesion Definition Cell adhesion is the process in which a cell uses a specialized complex of proteins to get... Read More

Definition

Protein

Protein Definition Proteins are biomolecules comprised of amino acid residues joined together by peptide bonds.... Read More

Definition

Mutagen

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

Definition

Embryo

An embryo refers to the early developmental stage of a multicellular organism that follows fertilization. This stage... Read More

Definition

Allotetraploid

Allotetraploid Definition An allotetraploid is an organism with four sets of chromosomes (4n). This is in contrast to the... Read More

Definition

Nucleic acid

Nucleic Acid Definition A nucleic acid refers to any of the group of complex compounds consisting of chains of monomers of... Read More

Definition

Mosaicism

Cells often go through many divisions before they become a part of an organism’s genetic make-up. This leaves room for... Read More

Definition

Zoology

Zoology Definition Zoology is an ever-evolving branch of Biology dealing with the members of the Kingdom Animalia. It... Read More

Definition

Scleroprotein

Definition noun, plural: scleroproteins A type of protein characterized by being fibrous and its function which is to... Read More

Definition

Biomolecule

A molecule is an electrically neutral, group of atoms that can exist alone in a free state while its characteristic... Read More

Definition

Spheroprotein

Definition noun, plural: spheroproteins A type of protein characterized by being globular or spherical in shape, and... Read More

Definition

Operon

Definition noun, plural: operons A group of genes or a segment of DNA that functions as a single transcription unit. It is... Read More

Definition

Arthropod

Arthropod Definition What is an arthropod? An arthropod is an invertebrate living organism characterized by the presence of... Read More

Definition

Ribosome

A biological cell is composed of many components called organelles. These organelles serve their specific purposes to make... Read More

Definition

Nuclear matrix

Definition noun plural: nuclear matrices (cell biology) A 3-dimensional filamentous protein network that extends... Read More

Definition

Molecular genetics

Definition noun A branch of genetics that deal with the structure and function of genes at a molecular... Read More