mosaic model of the cell membrane. What is the fluid mosaic model? The fluid mosaic model is a model conceived by S.J. Singer and Garth Nicolson in 1972 to describe the structural features of biological membranes. The membrane is described to be fluid because of its hydrophobic integral components such as lipids and membrane proteins that move laterally or sideways throughout the membrane. That means the membrane is not solid‚ but more like a ’fluid’. The membrane is depicted as mosaic because
Premium Protein Cell membrane Membrane biology
Problem Set - Small Molecules (Campbell Chapters 2 and 3) 1. What are the SPONCH elements and what is common among these elements that make them suitable for life? State the four most frequently occurring of the SPONCH elements. Which of the SPONCH elements is found in each of the large biomolecules (carbohydrates‚ proteins‚ lipids‚ nucleic acids). The SPONCH elements are Sulfur‚ Phosphorus‚ Oxygen‚ Nitrogen‚ Carbon and Hydrogen. These are the five key elements that compose living
Premium Atom Water Hydrogen
Topic 2 – Cell membranes Reading Chapter 5 Objectives Functions of cell membranes The fluid mosaic model The lipid bilayer – phospholipids‚ glycolipids and sterols Properties of the lipid bilayer Membrane proteins – the ‘mosaic’ in the model Solute movements across membranes BIO 1140 – SLIDE 1 http://www.nikonsmallworld.com/gallery/year/2006/id/751 Functions of cell membranes – an overview Fluid mosaic model Singer & Nicolson 1972 Fluid lipid molecules in which proteins
Premium Cell membrane Lipid bilayer Protein
liquids‚ and gases. Fewer people know that there are actually more states of matter‚ including the fourth and fifth states: plasma and the Bose-Einstein Condensate‚ or BEC. The plasma and Bose-Einstein Condensate states of matter‚ while having some similarities‚ are two completely different forms of matter and connect with the Kinetic Molecular Theory in differing ways. Plasma is the fourth state of matter. It’s a fluid‚ gas-like substance that consists of a mixture of free electrons‚ neutral atoms
Premium Atom Molecule Fundamental physics concepts
BIOLOGY LABORATORY Biologically Important Molecules Carbohydrates‚ Proteins‚ Lipids‚ and Nucleic Acids Objectives In this lab you will learn to: 1. Perform tests to detect the presence of carbohydrates‚ lipids‚ proteins‚ and nucleic acids 2. Recognize the importance of a control in a biochemical test 3. Use biochemical tests to identify an unknown compound Introduction Organic molecules are those primarily made up of carbon‚ hydrogen and oxygen. The common organic compounds of living
Premium Amino acid Glucose Protein
During the Gilded Age‚ in the end which would be from 1875-1900 it was an era of prosperity and poverty. It is often remembered by the lifes of those like the Rockefellers and Carnagies‚ while the other majority of the people were working class. However‚ the movement towards organized labor was unsuccessful in improving the position of workers because of the failure of strikes‚ the superiority feeling employers had over employees and most importantly the lack of governmental support. Therefore the
Premium Strike action Trade union Employment
Part 1 Part 1 of the experiment investigated the effect of different temperatures on beetroot cell membranes (a type of plant cell). Through this experiment‚ the process of diffusion and osmosis was in action. Various temperatures ranging from low temperatures to high temperatures such as -5⁰C‚ 5⁰C‚ 30⁰C‚ 50⁰C and 80⁰C were used to investigate the temperature effects on beetroot cell membranes. The hypothesis predicted that the higher the temperature the darker the beetroot substance and the lower
Premium Cell membrane Cell PH
important to understand and examine the water molecule in order to ascertain how it brought about Earth’s thriving ecosystem and how important it is for us today. Water is a strong solvent‚ it’s a very unique molecule that can breaks and reforms constantly. Each water molecule consists acid What is acid rain? Acid rain is the term for pollution caused ... of one oxygen atom and two hydrogen atoms. The oxygen atom also called the "apex of the water molecule" bears a slight electronegative charge while
Premium Water Oxygen Atom
Title Membrane Permeability Aim To determine the effect of various chemicals and high temperature on the membrane permeability of beetroot Hypothesis Organic solvent and high temperature will destroy the cell membrane and make it permeable to the red pigment. The higher the concentration of the alcohol‚ the greater will be this effect. Principle Beetroot is the material used in this experiment to demonstrate the effects of high temperature and chemicals on the permeability of the cell membranes
Premium Protein Cell membrane Ethanol
Dimethyltryptamine or DMT is a substance found all over the globe‚ in trees‚ in shrubs‚ in grass‚ and in your body. Alexander Shulgin‚ world renowned biochemist is quoted asking “...but the important question is‚ what isn’t DMT in?”. Its described well by Dr. Rick Strassman‚ the only scientist given permission to study it in the last 40 years as; “The Spirit Molecule”. Many believe this substance‚ which flows through every human’s veins may be a link between the mundane world and spiritual
Premium Brain