Biology OCR A level paper 1 |271 Questions and Answers with complete solution

Magnification of light microscope - X1500 Resolution of light microscope - 0.2micrometers Magnification of a scanning electron microscope - X Resolution of scanning electron microscope - 0.002 micrometers Magnification of a transmission electron microscope - X1,000,000 Resolution of a transmission electron microscope - 0.0002 micrometers What can be used as a counterstain - safranin dye Magnification - How many times larger the image is than the actual size of the object being viewed Resolution - How detailed the image is. How well the microscope distinguishes between 2 points that are close together. Nucleolus - Produces ribosomes. Made of protein and RNA, which is used to make rRNA, which combines with protein to form ribosome. What's the plasma membrane made off - Many lipids and proteins Centrioles - Small, hollow cylinders made of microtubules