General Biology: Definitions and explanations page 14 PDF Book

Learn general biology terms with definitions and explanations, biology terminologies (Page 14) for biology degree programs.


  1. What is Protein phosphatase?
    A phosphatase is an enzyme that removes a phosphate group from a protein which changes its ...
  2. What is Protein?
    A protein is one of the most important biological molecules which are formed by the translation ...
  3. What is Proteome?
    The proteome is the entire set of proteins that is, or can be, expressed by a ...
  4. What are Proteomics?
    Proteomics is the large-scale study of proteins. proteins are vital parts of living organisms, with many ...
  5. What are Proto oncogenes?
    Proto-oncogene is actually a normal gene which, when altered by mutation, becomes an oncogene that can ...
  6. What is Protocells?
    A protocell is a self-organized, endogenously ordered and spherical collection of lipids which has been proposed ...
  7. What is Proton pump?
    A proton pump is an integral membrane protein that helps the movement of protons inside or ...
  8. What is Protoplast?
    The protoplast comprises of the entire cell, excluding the cell wall. protoplasts can be generated by ...
  9. What is Provirus?
    Some viruses for example the retro viruses have he ability to incorporate their genome in the ...
  10. What are Pseudogenes?
    Pseudogenes, sometimes referred to as zombie genes in the media, are segments of dna that are ...
  11. What is Pseudopodia?
    A pseudopod is a temporary arm-like projection of a cell membrane of usually eukaryotes. this projection ...
  12. What is Pulmocutaneous circuit?
    Pulmocutaneous circulation is part of the amphibian circulatory system. it is responsible for directing blood to ...
  13. What is Pulmonary circuit?
    The pulmonary circulation is the portion of the circulatory system which carries deoxygenated blood away from ...
  14. What is Pulse?
    A pulse represents the tactile arterial palpation of the heartbeat by trained fingertips. the pulse may ...
  15. What is Punnett Square?
    The punnett square is a square diagram that is used to predict the genotypes of a ...
  16. What is Purine?
    Purines are heterocyclic aromatic organic compound that consist of two rings; one is a pyrimidine ring ...
  17. What is Pyrimidine?
    Pyrimidine is an aromatic heterocyclic organic compound that is composed of one ring. in nucleic acids ...
  18. What is Quantitative character?
    A quantitative trait is a measurable phenotype that depends on the cumulative actions of many genes ...
  19. What is Radial symmetry?
    Radially symmetric organisms resemble a pie where several cutting planes produce roughly identical pieces. such an ...
  20. What is Radioactive isotope?
    A radioactive isotope is a different specie of the same element. a radioactive atom that has ...
  21. What is Radiometric dating?
    Radiometric dating is a technique used to date materials such as rocks or carbon, in which ...
  22. What is Radula?
    The radula is an anatomical structure used by mollusks for feeding, sometimes compared to a tongue. ...
  23. What is Ras protein?
    Ras is a family of related proteins which is expressed in all animal cell lineages and ...
  24. What is Reading frame?
    A reading frame is a way of dividing the sequence of nucleotides in a nucleic acid ...
  25. What are Receptor tyrosine kinases?
    Receptor tyrosine kinases are a group of proteins that are the high-affinity cell surface receptors for ...
  26. What is Recessive allele?
    A recessive allele can only express itself when it is in the homozygous form. a good ...
  27. What is Recombinant bacterium?
    Recombinant dna (rdna) molecules are dna molecules formed by laboratory methods of genetic recombination for example ...
  28. What are Recombinant chromosomes?
    Recombinant chromosomes are formed when there is shuffling of genetic material between the homologous chromosomes. this ...
  29. What is Recombinant DNA?
    Recombinant dna (rdna) molecules are dna molecules formed by laboratory methods of genetic recombination for example ...
  30. What is Rectum?
    The rectum is the final straight portion of the large intestine in humans and some other ...
  31. What is Redox Reaction: Oxidation?
    When a specie gains protons or oxygen atoms its said to have oxidizing properties. in other ...
  32. What is Reducing agent?
    The agent is itself being oxidized is called the reducing agent. a reducing agent is typically ...
  33. What is Reduction?
    Reduction is the gain of electrons or a decrease in the oxidation state of an atom ...
  34. What is Regulator?
    Regulators regulate their bodies to remain at a relatively constant temperature. while in the past such ...
  35. What are Regulatory genes?
    A regulator gene or a regulator is a gene that is involved in controlling the expression ...
  36. What is Relative fitness?
    The fitness of an organism is the quantitative representation of natural and sexual selection within evolutionary ...
  37. What is Repetitive DNA?
    Repeated sequences are also known as repetitive elements, repeating units or repeats, and are patterns of ...
  38. What is Replication fork?
    Replication fork is a characteristic feature of replication of dna. the replication fork is actually the ...
  39. What are Repressible enzymes?
    An enzyme that is produced continuously unless production is repressed by excess of an inhibitor. repressible ...
  40. What is Repressor?
    The repressor proteins work with the operons. the main function of it is to bind to ...
  41. What is Reproductive System?
    The reproductive system consists of a system of an organism which works together for the purpose ...
  42. What is Residual volume?
    Residual volume is the amount of air that remains in a person's lungs after fully exhaling. ...
  43. What are Respiratory pigments?
    A respiratory pigment is a molecule that increases the oxygen-carrying ability of the blood. the four ...
  44. What is Respiratory system?
    The respiratory system (also respiratory apparatus, ventilatory system) is a biological system consisting of specific organs ...
  45. What are Restriction enzymes?
    Restriction enzymes are those enzymes that have specific cutting sites on the dna. they will not ...
  46. What is Restriction fragment?
    A restriction fragment is a dna fragment resulting from the cutting of a dna strand by ...
  47. What is Restriction site?
    Restriction sites, or restriction recognition sites, are locations on a dna molecule containing specific sequences of ...
  48. What is Retrovirus?
    A retrovirus is a type of rna virus that inserts a copy of its genome into ...
  49. What is Reverse transcriptase?
    A reverse transcriptase (rt) is an enzyme used to generate complementary dna (cdna) from an rna ...
  50. What is Rheumatoid arthritis?
    Rheumatoid arthritis is a long-term autoimmune disorder that primarily affects joints. it normally results in warm, ...
  51. What is Ribosomes?
    Ribosomes comprise a complex macromolecular machine and are the primary sites where the protein translation takes ...
  52. What are Ribozymes?
    A ribozyme is a ribonucleic acid or an rna enzyme that catalyzes a chemical reaction. the ...
  53. What is RNA polymerase?
    Rna polymerase is an enzyme that produces rna and catalyzes the initiation and elongation of rna ...
  54. What is RNA primer?
    The dna replication cannot just begin on its own on the template strand. one of the ...
  55. What is RNA splicing?
    Rna splicing is a process that removes the intervening, non-coding sequences of genes, which are also ...
  56. What is RNA?
    Ribonucleic acid is also like the dna molecule except it has a different sugar. it is ...
  57. What is Root cap?
    The root cap is a type of tissue at the tip of a plant root. it ...
  58. What are Root hairs?
    A root hair, or absorbent hair, the rhizoid of a vascular plant, is a tubular outgrowth ...
  59. What is Root pressure?
    Root pressure is the transverse osmotic pressure within the cells of a root system that causes ...
  60. What is Root system?
    The root system of a plant constantly provides the stems and leaves with water and dissolved ...