Btec National Applied Science Biology 39 Correctly Answered Questions Latest Update

Nucleolus {Ans: -Dense spherical structure in the middle of the nucleus -makes RNA and ribosomes}Calculating magnification {Ans: Eyepiece X objective magnification = overall magnification}Red blood cells {Ans: -biconcave shape, increases surface area of cell -flexible so can squeeze through narrow capillaries -transport oxygen around the body -No nucleus, increases space for haemoglobin}1665 {Ans: Robert Hook described cells}SEM {Ans: Scanning electron microscope 3D}Vesicles {Ans: -small spherical membrane bounds sacs with fluid inside -transport materials in cells and secretory vesicles transport proteins released in cell to cell surface membrane}