General Biology: Definitions and explanations page 17 PDF Book

Learn general biology terms with definitions and explanations, biology terminologies (Page 17) for biology degree programs.


  1. What is Thyroid gland?
    The thyroid gland is an endocrine gland located in neck, consists of two lobes. it is ...
  2. What is Tidal volume?
    Tidal volume is the lung volume representing the normal volume of air displaced between normal inhalation ...
  3. What are Tight junctions?
    Tight junctions basically have the function of binding adjacent epithelial cells in a narrow band just ...
  4. What are Tissue specific proteins?
    Tissue-specific gene expression can result in the presence or absence of certain protein interactions and complexes, ...
  5. What is Tissue?
    An individual organization of cells that is between the cellular and organ level. a tissue is ...
  6. What are Tissues?
    A tissue is a cellular organizational level between cells and a complete organ. a tissue is ...
  7. What is Topoisomerase?
    Many important enzymes participate in dna replication including topoisomerases. these are the enzymes that participate in ...
  8. What is Topsoil?
    Topsoil is the upper, outermost layer of soil, usually the top 5to 10 inches. it has ...
  9. What is Torpor?
    Torpor is a state of decreased physiological activity in an animal, usually by a reduced body ...
  10. What are Totipotent cells?
    Cell potency is a cell's ability to differentiate into other cell types. the more cell types ...
  11. What are Trace elements?
    A trace element is present in an organism in a very minute quantity however its presence ...
  12. What is Trachea?
    The trachea is also called the windpipe. it is a cartilaginous tube that connects the pharynx ...
  13. What is Tracheal system?
    The trachea which is also called the windpipe, is a cartilaginous tube that connects the pharynx ...
  14. What is Tracheid?
    Tracheids are elongated cells in the xylem of vascular plants that serve in the transport of ...
  15. What is Trait?
    Every variant for a character is called a trait. for example for skin color, which is ...
  16. What is Transcription factor?
    A transcription factor is a protein that controls the rate of transcription of genetic information from ...
  17. What is Transcription initiation complex?
    Transcription factors can bind to specific dna sequences called enhancer and promoter sequences in order to ...
  18. What is Transcription unit?
    Sequence of nucleotides in dna that codes for a single rna molecule, along with the sequences ...
  19. What is Transcription?
    Transcription is the first step in gene expression and involves transcribing a gene's dna sequence to ...
  20. What is Transduction?
    Transduction is the process by which foreign dna is introduced into a cell by a virus ...
  21. What is Transformation?
    Transformation is the genetic change of a cell resulting from the direct uptake and incorporation of ...
  22. What is Transgenic animal?
    Transgenic animals are animals that have had a foreign gene deliberately inserted into their genome. such ...
  23. What is Transgenic?
    The term transgene describes a segment of dna containing a gene sequence that has been isolated ...
  24. What is Translation?
    Translation is the process in which ribosomes in the cytoplasm or er synthesize proteins after the ...
  25. What is Translocation?
    Chromosome translocation basically is a phenomenon that results in unusual rearrangement of chromosomes or an arrangement ...
  26. What is Transmembrane route?
    The transmembrane route is a route where water and solutes use a combination of the apoplastic ...
  27. What is Transpiration?
    Transpiration is the process in which plants release the water which is present inside the plant, ...
  28. What are Transport vesicles?
    These vesicles are actually is a large structure within a cell that are enclosed by a ...
  29. What are Transposable elements?
    Transposable elements are also known as "jumping genes" or transposons, are sequences of dna that move ...
  30. What is Triple response?
    Ethylene is a phytohormone which is produced in the plant under the conditions of mechanical stress. ...
  31. What is Triplet code?
    The standard version of the genetic code, in which a sequence of three nucleotides on a ...
  32. What is Trisomy?
    Trisomy is another important example of aneuploidy when the chromosomes fail to separate during meiosis. trisomy ...
  33. What is tRNA?
    Transfer ribonucleic acid (trna) is a type of rna molecule that helps decode a messenger rna ...
  34. What is Tropism?
    A tropism is a phenomenon that indicates growth or turning movement of a biological organism, which ...
  35. What is True breeding?
    A true breeding is a kind of breeding wherein the parents would produce offspring that would ...
  36. What are Tumor suppressor genes?
    A tumor suppressor gene, which is also called an antioncogene, is a gene that protects a ...
  37. What is Turgid?
    When plants are kept in a hypotonic environment, the water content inside the cells will be ...
  38. What is Turgor pressure?
    Turgor pressure is the force within the cell that pushes the plasma membrane against the cell ...
  39. What is Turner syndrome?
    A monosomic disorder in which the female receives only one copy of the x chromosome. turner ...
  40. What is Type I diabetes?
    Type 1 diabetes, which usually appears during childhood, destroys the person's ability to produce insulin. treatment ...
  41. What is Type II diabetes?
    Type 2 diabetes (t2d), also known as adult-onset diabetes, is a form of diabetes that is ...
  42. What is Undernutrition?
    Undernutrition denotes insufficient intake of energy and nutrients to meet an individual's needs to maintain good ...
  43. What is Ureter?
    In human anatomy, the ureters are tubes made of smooth muscle fibers that expel urine from ...
  44. What is Urinary bladder?
    The urinary bladder is a organ that is hollow and muscular in humans and some other ...
  45. What is Uterus?
    The uterus is a main female hormone-responsive secondary sex organ of the reproductive system and is ...
  46. What is Vaccine?
    According to who, a vaccine is a biological preparation that improves immunity to a particular disease. ...
  47. What is Vacuole?
    Vacuoles are closed sacs and are made of membranes. vacuoles have several kind of organic and ...
  48. What is Van der waals force?
    Weak forces that are responsible for bond formation only when the atoms are in close proximity, ...
  49. What is Variables?
    Any factors that can vary in an experiment for example to check the effect of sunlight ...
  50. What is Vascular cambium?
    The vascular cambium is a plant tissue located between the xylem and the phloem in the ...
  51. What are Vascular rays?
    Vascular rays are a radiate band of parenchyma in the secondary xylem extending into the secondary ...
  52. What is Vascular tissue?
    Vascular tissue is a complex conducting tissue, formed of more than one cell type, found in ...
  53. What is Vasoconstriction?
    Vasoconstriction is the narrowing of the blood vessels resulting from contraction of the muscular wall of ...
  54. What is Vasodilation?
    Vasodilation is the widening of blood vessels and it typically is a result of relaxation of ...
  55. What is Vegetative reproduction?
    Vegetative reproduction is also known as vegetative propagation, vegetative multiplication or vegetative cloning. it is any ...
  56. What are Veins?
    A vein is a vascular structure which comprises of xylem and phloem cells surrounded by the ...
  57. What is Ventilation?
    Breathing is the process of moving air into and out of the lungs to help in ...
  58. What is Ventricles?
    A ventricle is one of two large chambers toward the bottom of the heart that collect ...
  59. What is Vernalisation?
    Vernalization is the induction of a plant's flowering process by exposure to the prolonged cold of ...
  60. What are Vertebrates?
    Vertebrates comprise all species of animals within the subphylum vertebrata, that are chordates with backbones. vertebrates ...