📖 generic · 12th TN - English Medium · ZOOLOGY · Page 244question

Glossary · Part 4

Chapter 15: Back Matter · ZOOLOGY

urethra,endocervicitis- inflammation inside the cervix, epididymitis - inflammation in the epididymis, prostatitis - inflammation in the prostate gland. Keystone species- A species whose loss from an ecosystem would cause a greater than average change in other species population or ecosystem process. Locus – The particular point on the chromosome at which the gene for a given trait occurs. Macrophage - A large, leucocyte derived from a monocyte that functions in phagocytosis.

Malt - Mucosal Associated Lymphoid Tissue collective terms for secondary lymphoid organs located along various mucous membrane surfaces including Peyer’s patches, tonsils, appendix. Mast cell - A bone marrow derived cell. Menarche – Starting of the first menstrual period. Merozoite - A trophozoite of Plasmodium found in RBC or liver cells.

Methanogenesis – Conversion of acetate, H and CO into methane by methane producing bacteria. Molecular biology – The branch of biology which attempts to interpret biological events in terms of the physico chemical properties of molecules in a cell. Molecular Pharming – Production of active pharmaceutical substances in genetically moldified organisms. Mould – An impression of a complete organism or a part of it in the rock that surrounds it.

Multiple Sclerosis– It is a demyelinating disease in which the insulating covers of nerve cells in the brain and spinal cord are damaged. Mutation – Sudden and inheritable changes. Narcotic - A powerful drug that produces, relaxed, dreamy state, derived from Opium plant. Nascent RNA – Nascent RNA is an immediately formed RNA.

In this RNA no post transcriptional modification had occured. NBOD – Nitrogenous BOD. Nk cells - Natural Killer cells that kill infected and tumor cells. Nondisjunction – Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate properly during cell division.

NPK fertilizers– Fertilizers with Nitrogen (N), Phosphorus (P) and Potassium (K). Nucleosome – A morphologically repeating unit of DNA containing base pairs of DNA folded together with eight histone molecules. Null cell - A small population of peripheral blood lymphocytes that lack the membrane markers characteristic of B and T cells. Natural killer cells are included in this group.

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