Electron microscope

activity of a chloroplast electron transport chain. The two choices that were available for us to investigate was broccoli and pea seedlings. Our group was nominated to utilize 20 grams of broccoli florets to find fractions that composed of an abundance of chloroplast. Project 1 had 3 parts to it; this consists of fractionation of cell homogenates, assay for chloroplast-specific electron transport chain activity, and testing factors that affect activity of the chloroplast electron transport…

ATP synthase is completely reliant on the generation of a proton gradient by the electron carriers in the membrane, such as quinine or cytochromes. Further to this it has been shown that both active and latent mycobacteria are reliant on the ATP generated by ATP synthase, and therefore an ideal target is to affect the proton gradient…

Microscopy is one of science’s greatest innovations. The microscope has revolutionised countless areas of scientific research and has become an icon of science itself. From Anton van Leeuwenhoek discovering micro-organisms in the 1670’s to the highly powerful atomic microscopes used today, microscopy has furthered scientific knowledge in many, many ways [1]. It has practical applications in very many areas of research such as biotechnology, materials science, microbiology, environmental science…

with a light microscope, which can only magnify up to X2000 and can only resolve objects more than 200nm apart. The Scanning Electron Microscope (SEM) works by bouncing electrons of the surface of the specimen showing a 3D image on a computer screen. SEM can magnify up to X5000 and can resolve specimens 1nm apart. With this microscope the ribosomes could be seen and would show the shape, however the inside of the ribosome could not be seen. In contrast, the Transmission Electron Microscope (TEM)…

Microscope Essay Carolyn, 6C 20 November 2015 Microscopes How has the microscope helped our understanding of science and changed the world? The microscope has developed a huge understanding of science and really changed the world. Microscopes magnify tiny objects, which make them look a lot larger. Scientists use microscopes to see tiny objects that are too small to see with our eyes. These include cells, tiny living things, and grains of sand. A compound light microscope can give a…

and would destroy all DNA. Investigators later found help from a microscopy detective that would aid in telling them what the stomach materials were (Dowling et al.). The detective used a polarizing light microscope to analyze the stomach contents. A polarizing light microscope is a microscope that uses polarized light to analyze the optical properties and internals of specimens (“What You Ought to Know about Polarising Light Microscopy”, bitesizebio.com). Polarized light is a type of light that…

microscopically, in which the pattern of the medulla, pigmentation of cortex and even the type of scales on the cuticles are examined (Bertino 56). A comparison microscope allows for side-by-side comparison of samples. Today, hair can be analyzed by neutron activation analysis, DNA fingerprinting methods (Bertino 51), and many types of microscopes. A strand of hair is place in a nuclear reactor and bombarded with high energy neutrons. In which it detects up to 14 different elements on a single…

Biology Chapter 4 Extra Credit Essays 1. An electron microscope would be better than a light microscope because an electron microscope allows you to view objects much smaller than you can with a light microscope. It might be better to use a light microscope if you are viewing a live specimen and do not want to kill it. 2. Prokaryotic cells are small, simple, no nucleus, no membrane-bound organelles, single loop of DNA (nucleosome), no cellulose, cytoplasm, cell membrane, cell wall (made of…

GENE REGULATION: Gene regulation is the method of limiting the genes in the cell’s DNA, which are expressed. It is utilize to form a functional manufacture for an example protein. Various cells in a multi cellular organism might express very difficult group of genes. Although, they consist the similar DNA. Human having over ten thousands of genes in their genome. Cells are expressed the all genes. Even an organism as simple as bacterium must carefully regulate gene expression. Ensuring that the…

multicellular organism, the activity of the entire organism depends on the total activity of its independent cells 3 Significance of technological advances to developments in the cell theory Assess the impact of technology including the development of the microscope on the development of the cell theory The development of cell theory has been heavily impacted by the improvement of technology. The improvement has allowed us from first only seeing a big group of cells to being able to now see to a…