579 results found

Search Results for: dna

Single-stranded DNA

What is single-stranded DNA? DNA is the material that living organisms possess that carries their genetic make-up. DNA and... Read More

Mitochondrial DNA

Mitochondrial DNA Definition noun plural: mitochondrial DNAs The genetic material in the mitochondrion that carries code... Read More

Recombination DNA repair

Recombination DNA Repair Definition Recombination DNA repair is a biological reparative process in response to DNA damage... Read More

Chloroplast DNA

Definition noun plural: chloroplast DNAs DNA in the chloroplast that carries the code for proteins and RNAs essential to... Read More

DNA Structure & DNA Replication

Previous pages in this tutorial have described the basics of a cell, the energy required by these cells and how energy is... Read More

DNA polymerase

Definition noun, plural: DNA polymerases (molecular biology) An enzyme assisting in DNA replication Supplement Polymerases... 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

DNA replication

DNA Replication Definition DNA replication is the process of copying and duplicating a DNA molecule. The process is carried... Read More

Mitochondrial DNA not just from moms but also from dads?

If one wants to trace down lineage, that person could turn to the cell's powerhouse, the mitochondrion. This organelle... Read More

Nucleosome

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

Recombinant DNA

Definition noun Genetically-engineered DNA molecule formed by splicing fragments of DNA from a different source or from... Read More

Deoxyribonucleic acid

Deoxyribonucleic Acid (DNA) Definition A nucleic acid refers to any of the group of complex compounds made up of linear... Read More

DNA polymerase II

Definition noun A DNA polymerase involved in DNA replication in prokaryotes, is encoded by polB gene, and composed of 783... Read More

Replication

Replication, in the general sense, is to create a copy or a duplicate. Thus, in biology, replication is commonly associated... 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

Repetitive DNA

Definition noun (molecular biology) Repetitive nucleotide sequences in the DNA throughout the genome Supplement The... Read More

Mitochondrial DNA – hallmark of psychological stress

We often hear that stress can be unsettling as it could make us ill when it becomes chronic and overwhelming. However, is... Read More

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

DNA polymerase I

Definition noun The first known DNA polymerase, encoded by polA gene, and is involved in DNA replication in... Read More

RNA-DNA World Hypothesis?

How did life start as we know it? In the scientific community, the "RNA World Hypothesis" has many adherents. Many believed... 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

RDNA

Definition noun, plural: rDNAs An abbreviation for the following terms: ribosomal DNA recombinant DNA Supplement rDNA can... Read More

Mitochondrion

Mitochondrion Definition What are mitochondria? The term “mitochondrion” comes from the two words of the Greek... Read More

Satellite DNA

Definition noun, plural: satellite DNAs (molecular biology) A portion of the DNA of a genome consisting of tandemly... Read More

Complementary DNA

Definition noun A double stranded DNA produced from the messenger RNA synthesis in a reaction catalyzed by an enzymes... Read More

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

Base-pairing rule

Base-pairing Rules Definition The base-pairing rules are rules that apply during the pairing between one purine and one... Read More

Chromosome

Chromosomes Definition Chromosomes are thread-like structures present in the nucleus of plant and animal cells. Chromosomes... Read More

Exogenous

Exogenous Definition Exogenous is a word referring to a factor or event coming or contributing from outside a defined... Read More

Genetic material

Genetic Material Definition What is genetic material? Genetic material is the hereditary substance in the cell. It carries... Read More

Dna ligase

Dna ligase (Science: enzyme molecular biology) enzyme involved in dna replication. The dna ligase of E. Coli seals nicks in... Read More

Ribonucleic acid

Ribonucleic Acid Definition noun (uncountable), ribonucleic acids ri·bo·nu·cle·ic ac·id, raɪboʊnjuːkliːɪk... Read More

Melting temperature of dna

melting temperature of DNA --> denaturation temperature of DNA That temperature at which, under a given set of... 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

Transcription (biology)

In biology, transcription is the process of transcribing or making a copy of the genetic information stored in a DNA strand... Read More

Genome

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

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

Specimen

A specimen is a meticulously selected representative of a group that undergoes rigorous research studies to derive some... Read More

DNA virus

Definition noun A virus containing DNA as its genetic material and using a DNA-dependent DNA polymerase during... Read More