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A-B-C-D-E-F-G-H-I-J-K-L-M-N-O-P-Q-R-S-T-U-V-W-X-Y-Z
- N-acetylglucosamine (NAG)
- N-regions
- [of BCR and TCR genes]
- N-terminal
- [view]
- nanos
- [role of gene in Drosophila segmentation] [establishing the tail of the Drosophila embryo]
- Nearsightedness
- in humans
- Nectar
- Sugar solution, secreted by plants, from which bees make honey.
- Nekton
- Actively swimming animals in a body of water.
- Nephron
- Functional unit of vertebrate kidneys. [Discussion]
- Nerve
- Bundle of axons.
- Nervous system
- human
- Net productivity
- The amount of energy trapped in organic matter during a specified interval at a given trophic level less that lost by the respiration of the organisms at that level. [More]
- Neural folds
- [in frog embryology]
- Neuraminidase
- of influenza virus
- Neuromuscular junction
- Junction between a motor neuron and a muscle fiber. Also called a myoneural junction. [Discussion]
- Neuropeptide Y
- Neurotransmitter
- Substance released at the axon terminals of a neuron that either stimulates or inhibits the next neuron or muscle fiber. Acetylcholine and noradrenaline are neurotransmitters. [Discussion]
- Neuron
- A nerve cell.
- Neutron
- Electrically neutral particle found in the nuclei of all atoms except hydrogen-1. [More]
- Neutrophil
- One of the white blood cells. [More]
- Niacin
- Nicotinic acid, one of the B vitamins.
- Niche
- The place in a biological community occupied by a particular species in its relation to other species.
- Nicotinamide adenine dinucleotide (NAD) and NADP
- Coenzymes that transfer electrons within the cell.[Discussion and structure] [in Calvin cycle][from light reactions[NADH dehydrogenase]
- Nitric oxide (NO)
- as vasodilator
- Nitrogen fixation
- The conversion of atmospheric nitrogen (N-N) into nitrogen-containing compounds like ammonia.
- Nitrogen oxides (NOx)
- [in air]
- N-linkage
- [Glycoproteins]
- NMDA receptors
- Node
- (1) In plants, the point on the stem at which one or more leaves develop.[diagram] (2) Of Ranvier
- noggin
- [role of gene in frog embryology]
- Nondisjunction
- Failure of two homologous chromosomes to separate during meiosis.
- Noradrenaline
- Norepinephrine. [as neurotransmitter]
- Notochord
- Longitudinal, flexible rod located between the central nervous system and the gut at some stage in the development of all chordates. In vertebrates it is generally replaced by a column of vertebrae. [in frog embryology]
- Nuclear localization sequence
- [described]
- Nuclear Pore Complexes
- (NPCs)
- Nuclear transplantation
- [experiments]
- Nucleic acid
- A polymer of nucleotides; DNA and RNA.
- Nucleolus
- Nucleoside
- Molecule consisting of a purine or pyrimidine attached to a 5-carbon sugar. [More]
- Nucleosomes
- Nucleotide
- Molecule consisting of (1) a purine or pyrimidine; (2) a 5-carbon sugar; (3) one, two, or three phosphate groups covalently bonded together. [More] [Antisense oligodeoxynucleotides]
- Nucleus
- Nucleus accumbens
- Nutrition
- [requirements] [gastrointestinal (GI) tract]