Molecule

structure for biological membranes. One side of the molecule is made up of hydrophilic molecules (water loving) and the other end is made up of hydrophobic molecules (water hating). Even though the bilayer is constantly moving, is still forms an effective and secure barrier around the cell. The plasma membrane is semi permeable and this allows for small molecules such as water and glucose to pass through. However larger molecules rely on the protein molecules within the membrane for passing in…

sugar molecules will continue to come out of the solution and collect on the seed crystals on the string. Then the rock candy crystals will grow molecule by molecule. “Crystals form in the smallest particles of substance and the molecules arrange themselves in an orderly and repetitive pattern. But the molecules are too small for us to see moving around and arranging themselves. And the dissolving process involves two steps first the water molecules have to bind to the sucrose molecules…

analyzing such samples is Gel Electrophoresis (GE). Overview of Gel Electrophoresis: Gel electrophoresis is an effective and widely used method that separates and identifies molecules on the basis of electrical charge and size. GE is a particularly useful method for separating amino acids, which are charged, organic molecules such as DNA (deoxyribonucleic acids), RNA (ribonucleic acids), and proteins.…

chemically breaking down food molecules and teeth are used to mechanically chew food from larger molecules to smaller molecules. Food is then passed through the Pharynx. The Epiglottis in the Pharynx, is a flap of tissue that covers the trachea to prevent food from entering the lungs, thus directing molecules through the oesophagus. Contractions in the oesophagus transport food into the stomach where gastric juices containing both hydrochloric acid and enzymes break down molecules further.…

Chromatography is a key aspect in chemistry. It allows one to separate molecules based on a variety of things. In labs 3 and 4 we looked at two of the characteristics that molecules carry that can help separate them. Lab 3 used spectrophotometry once again, but the concept that garnered the most interest was ion exchange chromatography. Ion exchange chromatography works by separating molecules based on the individual charges they carry. In our case we used anion exchange chromatography, which…

talk about what a polymer is, we need to know about ATOMS and ELEMENTS and MOLECULES. To learn about atoms and elements and molecules, click here. Paul Lemur This is PAUL LEMUR. He's a lemur named Paul. Polymers are made up of many many molecules all strung together to form really long chains (and sometimes more complicated structures, too). What makes polymers so fun is that how they act depends on what kinds of molecules they're made up of and how they're put together. The properties of…

We get the energy to do things from a chemical reaction in our body that requires food molecules and oxygen. Food molecules and oxygen are generated by plants in a process called photosynthesis. We eat food and breathe in oxygen. The larger food molecules become subunits (such as glucose) in a chemical reaction called breakdown. Finally, our bodies use oxygen and glucose in the cellular respiration process to generate energy for our cells. Photosynthesis is the process in which plants get…

Problem: Will the starch, glucose, and the chloride ion molecules pass through the artificial membrane? Why or why not? Hypothesis: Tiny molecules have an easier time passing through the plasma membrane than larger molecules. Molecules that are greater than fifty atoms do not pass through the artificial membrane. This is due to its composition consists of thousands of atoms. Glucose is able to diffuse through membranes as its genetic makeup contains twenty-four atoms. Chloride Ions are also…

When a chemical reaction is taking place the enzyme works to lower the activation energy of a reaction. The activation energy is, the amount of energy that is required in order for a reaction to take place. Enzymes bind to reactant molecules. The enzymes hold these molecules in a way that makes the processes of the chemical bond-breaking and bond-forming take place more readily. A reaction can be either energy-releasing or energy-absorbing. Enzymes have no effect on this. This is because enzymes…

the process where an item comes into contact with a heat source and exchange thermal energy between two objects. It is a complex process that removes bacteria, while cooking food. Heat energy is created and transferred when food becomes hot, its molecules absorb energy and begin bouncing off each other. The first type of heat transfer is conduction. Conduction is the process where heat is transferred between objects by direct contact. Conduction is good for cooking because it allows food to be…