Molecular beam epitaxy

educational career, I have accumulated great interest in science and its relations with all aspects of life. Since junior high school, my interest and passion for biology and chemistry has grown stronger as years go by. Studying life processes in molecular terms…

Research Question: How does the mass (g) of soap in the Extraction solution affect the mass of DNA extracted (g) from kiwi? Aim: To see how the mass of soap in the extraction solution affect the mass of DNA extracted from a kiwi. Background Research: DNA is found in the nucleus of the cell. For this experiment, the main goals is to break apart the plant matter, dissolve the membranes of the cell and extracting the DNA found in the nucleus . To extract DNA, we would need a kiwi as DNA exists…

MSA University, faculty of pharmacy, Bio chemistry department. Course code PB301 Nucleotides Student name: ID: Under supervision of DR: Teaching assistant Structure Nucleic acids are polymers consist of units called nucleotides. These mononucleotide units react together by intermolecular dehydration reactions that create phosphate ester bonds. Those reactions are either, catalyzed or specialized enzymes. The nucleotide units are created by smaller types of components. Each nucleotide…

Different protein has different molecular weight, net charges, and functions partly because they contain different amino acid components. Hence, we would expect the pI value to vary from one protein to the other. Lysozyme is one example of proteins. Its molecular weight is of 16.23865 kD. It is composed of largely of alanine residues, which is a hydrophobic amino acid. Although alanine does not affect…

My intended STEM major that I choose to study in college is biology. I choose to major in biology because I found it fun and interesting and also because it is something that I needed to have a good understanding of if I plan to have a career in the medical field. I wanted to major in biology because I enjoyed biology in my sophomore year and it was one of the few classes that I was excited about. Although it's going to be harder and more complex in college,it will interesting and a new…

Preparation for Cell Lysis Obtain the mammalian expression vector for homo sapien ESR2 from Addgene. Assemble the vector to code for the proteins snail, slug and twist. Transfect HEK293 cells with the modified plasmids in petri dishes. Allow the cells to grow for 1-2 days so they will express the proteins. Transfer the culture medium to a centrifuge tube to separate it from the cells. Add 1mL of phosphate buffered saline (PBS) to the cells and swirl to mix. Separate the PBS from the cells and…

Electrophoresis Kendra Gibson November 17, 2015 A scientist drops DNA samples in small indentations at the end of a Jell-O-like gel. He turns on an electrical current at the other side of the gel. His anticipation grows as he watches the samples slowly move from one side to the other. He pulls out a ruler and makes some measurements. He steps back in surprise, for he had just identified the most feared serial killer in the world! He did this by using Gel Electrophoresis. Electrophoresis (the…

Until recently I had accepted the definition of a species as being a class of individuals sharing common characteristics, with the ability to reproduce with another member of the same species to produce a fertile offspring. However after this essay was assigned, I began researching and found that there are areas where this definition can be difficult to apply. There are four major definitions and concepts that can be applied to a ‘species’. The biological species concept, the morphological…

It is very important for cells in the role to suppress cancer. P53 has been described as "the guardian of the genome", referring to its role in conserving stability by preventing genome mutation (Strachan and Read, 1999). The name is due to its molecular mass: it is in the 53 kilodalton fraction of cell proteins. 2. GENE LOCATION The human p53 gene is located on the seventeenth chromosome (17p13.1). 3. STRUCTURE The p53 protein is a phosphoprotein…

Diffusion is important because it is how particles are moved into a cell and out. Diffusion is the movement of a particle from an area of higher concentration to an area of lower concentration (Reasoner 2011). Passive diffusion and facilitated diffusion are the two major types of diffusions. Passive diffusion, also known as simple diffusion, is when particles move freely through the lipid bilayer of the plasma membrane (Tortora and Derrickson 2014). Facilitated diffusion is when and integral…