Biology 22/10/2020
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8 questions
| 🇬🇧 | 🇬🇧 |
| Give 3 ways red blood cells are adapted to carry out their function? | 1)Shaped as biconcave disc - large surface area 2)Contain red pigment - haemoglobin, binds with oxgen - oxyhaemoglobin 3)Have no nucleus |
| Give 2 ways white blood cells are adapted? | 1)Engulf microorganisms - phagacytosis 2)Produce antibodies to fight microorganisms and antitoxins to neutralise their toxins |
| Give 2 ways platelets are adapted? | 1)Small fragments of cells, have no nucleus 2)Help blood clot a wound preventing microorganisms getting in |
| Give 7 things plasma contain? | 1)Red and white blood cells and platelets 2)Nutrients - glucose and amino acids 3)Carbon dioxide 4)Urea 5)Hormones 6)Protiens 7)Antibodies and antitoxins produced by white blood cells |
| How can I test for reducing sugars? | 1)Place 5cm^3 food sample in test tube in 75c waterbath 2)Add 10 drops benidict soloution and leave 5 mins pointing away from you 3)Ascending sugar - Blue - Green - Orange - Brick Red |
| How can i test for starch? | 1)Place 5cm^3 in test tube 2)Add a few drops of iodine soloutuion gently shake 3)Brown/Orange (remains if no starch) to Blue black |
| How can i test for protiens? | 1)Place 2cm^3 in test tube 2)Add 2cm^3 biurett solution - gently shake 3)Blue (remains if no protien) to purple |
| How can I test for lipids? | 1)Prepare 5cm (dont need to filter) test tube 2)Add 3 drops sudan III stain soloution gently shake 3)Red seperate layer will form. |