57 results found

Search Results for: cleavage

Cleavage

Definition noun (1) A division or separation of form. (2) (cell biology) The act or state of splitting or dividing of a... Read More

Meroblastic cleavage

Definition noun (embryology) The incomplete cleavage in telolecithal or megalecithal eggs of animals, such as birds and... Read More

Incompete cleavage

Definition noun (embryology) The partial cleavage in telolecithal or megalecithal eggs in certain animals, such as birds and... Read More

Holoblastic cleavage

Definition noun (embryology) The complete division of an isolecithal or microlecithal egg into... Read More

Indeterminate cleavage

Definition noun A type of cleavage on the basis of the potentiality of blastomeres in which the blastomeres (resulting... Read More

Determinate cleavage

Definition noun A type of cleavage on the basis of the potentiality of blastomeres in which the blastomeres (resulting from... Read More

Unequal cleavage

Definition noun A holoblastic cleavage producing blastomeres of unequal size. Supplement An example is the holoblastic... Read More

Discoidal cleavage

Definition noun (embryology)A meroblastic cleavage wherein the cytoplasmic divisions are restricted to the animal pole,... Read More

Superficial cleavage

Definition noun (embryology) A meroblastic cleavage wherein mitosis occurs without cytokinesis, resulting in many nuclei,... Read More

Cleavage product

Cleavage product a substance resulting from the splitting of a molecule into two or more simpler... Read More

Hydrolytic cleavage

Hydrolytic cleavage --> hydrolysis (Science: chemistry) The splitting of a compound into fragments by the addition of... Read More

Phosphodiester bond

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

Cleavage site

Definition noun, plural: restriction sites The site in a polynucleotide chain as to where the restriction enzyme cleaves... Read More

Cell plate

Definition noun A disc like structure in the plane of the equator of the spindle that separates the two sets of chromosomes... Read More

Blastula

Definition noun An early form of an embryo undergoing developmental processes, such as cleavage. It is marked by the... Read More

Ribozyme

Definition noun, plural: ribozymes RNA molecule that acts as an enzyme in the aminotransferase activity of the ribosome and... Read More

Membrane attack complex

membrane attack complex --> complement (Science: immunology) A term originally used to refer to the heat labile factor in... Read More

Nuclease S1

Definition noun An endonuclease enzyme capable of degrading single-stranded DNA and RNA Supplement The nuclease S1 is a... Read More

Foliation

Foliation 1. The process of forming into a leaf or leaves. 2. The manner in which the young leaves are dispoed within the... Read More

Complement

Complement (Science: immunology) a term originally used to refer to the heat labile factor in serum that causes immune... Read More

Mitosis

Mitosis Definition What is mitosis? In biology, mitosis refers to the cellular process where a single cell divides... Read More

Blastocoel

Definition noun The primordial, fluid-filled cavity inside the early forms of embryo, e.g. of blastula. Supplement The... Read More

Restriction enzyme

Definition noun, plural: restriction enzymes An enzyme that catalyzes the cleavage of DNA at restriction sites, producing... Read More

Human Reproduction

Terminology and Concepts Primary reproductive organs are called gonads - testes in the male and ovaries in the female.... Read More

Plant cell

Plant Cell Definition A plant cell refers to any cell of a plant. It is the structural and functional unit of plants. Plant... Read More

Coenzyme

Enzymes can break down complicated large molecules into simpler smaller ones, they can combine small molecules or atoms to... Read More

Lyases

Lyases (Science: enzyme) a class of enzymes that catalyze the cleavage of c-c, c-o, and c-n, and other bonds by other means... 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

Segmentation cavity

Definition noun The fluid-filled cavity inside the early forms of embryo, e.g. of blastula. Supplement The presence of this... Read More

HnRNA

Definition noun, plural: hnRNAs The abbreviated form for heterogeneous nuclear ribonucleic acid: an extrachromosomal RNA... Read More

Segmentation

Definition noun, plural: segmentation (1) (embryology) Cleavage, i.e. the repeated division of a fertilized ovum forming... Read More

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

Steroidogenesis

Definition noun, plural: steroidogeneses The biosynthesis of steroid hormones from cholesterol by various cells, such as... Read More

Animal

Animal Definition An animal (plural: animals) refers to any of the eukaryotic multicellular organisms of the biological... Read More

Pyrophosphate

pyrophosphate (Science: chemistry) Two phosphate groups linked by esterification. Released in many of the synthetic steps... Read More

Phosphorylation

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

Blastulation

Definition noun The formation of blastula following the morula stage during the embryonic development of an... Read More

Mineral

Definition noun plural: minerals min·er·al, ˈmɪn.əɹ.əl Any of the various naturally-occurring abiogenic substances,... Read More

Meiosis

What is Meiosis? A simple definition of meiosis would be is this: meiosis is the process of cell division that results in... Read More

Spindle

Definition noun, plural: spindles (1) A collection of minute fibers composed of microtubules, which are prominent during... Read More