Ultracentrifugation Study guides, Class notes & Summaries

AQA A Level Biology Paper 1 Questions And Correct Answers Water removed from the reactants joining two molecules together forming a chemical bond Condensation The addition of water to the reactants to break a chemical bond between 2 molecules Hydrolysis 1. Add Benedict's reagent. 2. Heat the solution in a water bath for 5 minutes at 95 degrees Celsius. 3. Change from blue to brick red as CuO formed Test for Reducing Sugars (3) Smaller units from which larger molecules are made Monome...

AAB Basic Knowledge Test With Complete Solution

What are the three ways a pathogen can damage hosts cells? 1) rupturing them to release nutrients inside them 2) breaking down nutrients inside the cell for their own use. This starves and eventually kills the cell. 3) replicating inside the cells and bursting them when they're released What are the two ways pathogens cause disease? 1) production of toxins 2) cell damage What are the lifestyle factors that can affect your chances of getting cancer? 1) smoking 2) excessive...

what is simple diffusion molecules pass directly through the plasma membrane without the assistance of another molecule, from a higher concentration to a lower concentration. when is simple diffusion used to allow molecules to travel in and out of the cell membrane: examples water, o2, co2 and ethanol. What is a phospholipid? It is a lipid that has a phosphate group attached to the glycerol and only two fatty acid chains. What is a protein? chain of amino acids ...

AQA Biology WELL SOLVED. Practical TechniquesDescribe how the length of a cell could be estimated with an optical microscope - ANSWERMeasure length with an eyepiece graticle; calibrate with a stage micrometer Describe the method used to find the mean number of capillaries per mm2 in a thin section cut from sample of heart muscle - ANSWERMeasure diameter of field of view and calculate area; Using stage micrometer and eyepiece graticle; Count the number of capillaries in large number of field...

Analytes elevated in the morning: * Chloride, phosphorus, potassium and amylase Lactic acid, creatine kinase ACTH, cortisol, iron and aldosterone ACP, growth hormone, PTH and TSH Pipets are used with biologic fluids having a viscosity greater than that of water: * Mohr pipets Ostwald−Folin pipets Pasteur pipets Volumeteric pipets Analytes elevated when in standing position: * Glucose, insulin, triglycerides, gastrin and ionized calcium ACTH, cortisol and catecholamin...

Analytes elevated in the morning: * Chloride, phosphorus, potassium and amylase Lactic acid, creatine kinase ACTH, cortisol, iron and aldosterone ACP, growth hormone, PTH and TSH Pipets are used with biologic fluids having a viscosity greater than that of water: * Mohr pipets Ostwald−Folin pipets Pasteur pipets Volumeteric pipets Analytes elevated when in standing position: * Glucose, insulin, triglycerides, gastrin and ionized calcium ACTH, cortisol and catecholamin...

AQA A LEVEL BIOLOGY Paper 1 2024 What is the function of the cell membrane? - ANS To control what enters and leaves the cell, acts as a barrier between the cell and its environment. What structural feature of the cell membrane allows substances to enter/leave? - ANS Partially permeable What is the fluid mosaic model? - ANS States that a membrane is a fluid structure (because phospholipids are constantly moving) with a "mosaic" of various proteins embedded in it Describe t...

Hand-written notes on cell fractionation. Contains the conditions required and the process. Suitable for the AQA A-Level specification. Includes key terminology required to get the marks (I’ve done A-Level biology so I understand how horrible the mark schemes are). Keep going, good luck :)

QBM All of the Practice Exams Questions And Answers With Complete Solutions 2024 d. protein as a cartoon model, DNA as a ball-and stick model. The image below shows a. protein as a ball-and-stick model, DNA as a molecular surface representation. b. DNA as a ball-and-stick model, protein as a molecular surface representation. c. both as ball-and-stick models. d. protein as a cartoon model, DNA as a ball-and stick model. e. both as cartoon models. b. DNA is responsible for bacterial trans...