B3 Topic 1 Questions based on the Edexcel B3 Topic 1 content. (Specification from 2011). 4.0 / 5 based on 4 ratings ? BiologyGCSEEdexcel Created by: Rachael BullockCreated on: 08-04-13 19:16 Responses to a changing day length are called? Photoperiodism 1 of 29 Feeling sleepy, bowel movements, alertness, flowers opening and closing are all examples of? Circadian rhythms 2 of 29 Circadian rhythms in humans are regulated by over a 24 hour period by a timing mechanism called Biological clock 3 of 29 A medicinal drug produced by the cinchona tree used to treat malaria. Quinine 4 of 29 A medicinal drug produced by willow trees used to treat symptoms like pain and fever. Asprin 5 of 29 A medicinal drug in foxglove used in small amounts to treat heart disorders. Digoxin 6 of 29 A dye used as a qualitative test for the presence of significant numbers of bacteria in milk. Resazurin dye 7 of 29 The scientist who developed the technique pasteurisation. Louis Pasteur 8 of 29 The scientist who developed immunisation. Edward Jenner 9 of 29 Chemicals (proteins) found on the outer surface of pathogen which trigger the immune response. Antigen 10 of 29 Chemicals produced by some types of white blood cells which stick to pathogen antigens. Antibodies 11 of 29 Making someone immune to a disease is called? Immunisation 12 of 29 This type of lymphocyte produces antibodies. B lymphocytes 13 of 29 This type of therapy uses ionising radiation to treat cancers. Radiotherapy 14 of 29 When the immune system attacks the cells of transplanted organ we call this? Rejection 15 of 29 Name the process used to clean the blood of people with kidney failure using membranes to filter out waste products. Dialysis 16 of 29 The maintenance of an organism's water content and dissolved salt concentration is called? Osmoregulation 17 of 29 The kidneys are controlled by what gland? Pituitary 18 of 29 The empty follicle found in the ovaries becomes what structure? Corpus luteum 19 of 29 FSH and LH are hormones secreted by the? Pituitary gland 20 of 29 Osterogen is secreted by the? Ovaries 21 of 29 The corpus luteum secretes the hormone? Progestrone 22 of 29 Another name for a male or female sex cell is gamete 23 of 29 The head of a sperm cell contains contains a structure that contains enzymes to digest the membrane around the egg cell. What is it called? Acrosome 24 of 29 If a nucleus contains two sets of chromosomes it is called? Diploid 25 of 29 The term used to describe what a person looks like is called the? Phenotype 26 of 29 The term used to describe the alleles of a gene or genes possessed by an organism is called the? Genotype 27 of 29 A sex-linked genetic disorder in humans where the affected person cannot tell the difference between red and green. Red-green colour blindness 28 of 29 A blood clotting disorder caused by a recessive allele on the X chromosome Haemophilia 29 of 29
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