Ultracentrifugation - Study guides, Class notes & Summaries

AQA A level Biology Revision EXAM QUESTIONS WITH 100% CORRECT ANSWERS Describe how you would use a biochemical test to show that a solution contained a non-reducing sugar, such as sucrose. [3] - ANSWERS ,first reducing sugars test; boil with dilute HCl acid then Neutralise with NaHCǑ, add benedict and heat to 95 degrees C brick red ppt forms if reducing sugar is present Describe a chemical test you could carry out to show that a piece of coconut contains lipids. [3] - ANSWERS ...

EXAMINATION TESTS OF MICROBIOLOGY VIROLOGY AND IMMUNOLOGY DISCIPLINE Basic bacteriology 1. Who first designed the microscope, saw and sketched microbes? A. Louis Pasteur B. Robert Koch C. Ilya Mechnikov D. Dmitri Ivanovsky E. Antonie Philips van Leeuwenhoek 2. Without which structures, bacteria cannot carry out their activities? A. Capsule B. Spors C. Volutine granules D. Nucleoid E. Flagella 3. What structure determines the shape of a bacterial cell? A. Cytoplasmic membrane B. Capsid C. Capsu...

EXAMINATION TESTS OF MICROBIOLOGY VIROLOGY AND IMMUNOLOGY DISCIPLINE Basic bacteriology 1. Who first designed the microscope, saw and sketched microbes? A. Louis Pasteur B. Robert Koch C. Ilya Mechnikov D. Dmitri Ivanovsky E. Antonie Philips van Leeuwenhoek 2. Without which structures, bacteria cannot carry out their activities? A. Capsule B. Spors C. Volutine granules D. Nucleoid E. Flagella 3. What structure determines the shape of a bacterial cell? A. Cytoplasmic membrane B. ...

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...

AAB Basic Knowledge Test With Complete Solution

Capsule (slime) - ANSWER Protects the bacteria from attack by cells of the immune system. Flagellum - ANSWER Rotates to make the cell move. Viruses - ANSWER Acellular. Invade and reproduce inside the cells of other organisms. What is magnification? - ANSWER How much bigger the image is that the specimen. What is resolution? - ANSWER The ability of the microscope to distinguish between two points that are close together. Light/optical microscopes - ANSWER Uses light. Max resolut...

Notes and diagrams showing how optical microscopes, scanning electron microscopes and transmission electron microscopes work. Containing specifications, resolutions, magnifications and conditions for use for each microscope type, allowing for comparison as well as knowledge about each individually. Additionally, these notes have information on artefact introduction for microscopes and the usefulness of staining microscopy samples. There is also a diagram describing the processes of ultracentrifu...

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...

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...