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...

AQA AS level biology questions and answers already passed 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 ge...

AQA A Level Biology Paper 1 EXAM QUESTIONS (208 TERMS) WITH VERIFIED DEFINITIONS UPDATED 2024 Water removed from the reactants joining two molecules together forming a chemical bond The addition of water to the reactants to break a chemical bond between 2 molecules 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 Smaller units from which larger molecules are made 1. Add 2cm³ of food sample t...

Biology, Module 2: Cells complete Question and Answers How to calculate magnification magnification = image size/actual size two stages of cell fractionation Homogenation , ultracentrifugation why is the tissue placed in a cold, buffered solution for cell fractionation? cold to reduce enzyme activity that might break down organelles, buffered as pH can alter structure of organelles, or function of enzymes why is the tissue placed in a solution of the same water potential for cell frac...

AQA A-Level Biology Unit 2 (Guaranteed success 2023 ORGANELLE - CORRECT ANSWER-A specialised part of a cell that performs a particular function. MAGNIFICATION - CORRECT ANSWER-The ability of a lens to enlarge the size of an object. Calculated by dividing the image size by the real size of the object. RESOLUTION - CORRECT ANSWER-The ability of a microscope to distinguish two adjacent points as separate from each other. MICROMETER μm - CORRECT ANSWER-An SI unit of measurement which is...

AQA A LEVEL BIOLOGY 2023(Exam Elaboration) What is the function of the cell membrane? - CORRECT ANSWER-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? - CORRECT ANSWER-Partially permeable What is the fluid mosaic model? - CORRECT ANSWER-States that a membrane is a fluid structure (because phospholipids are constantly moving) with a "mosaic" of various p...

MMSC490 Practice Exam 1|123 Questions with Verified Answers cytoplasmic organelles are: a. absent in prokaryotic cells and present in eukaryotic cells. b. present in both prokaryotic and eukaryotic cells. c. present in prokaryotic cells and absent in eukaryotic cells. d. absent in both prokaryotic and eukaryotic cells. - CORRECT ANSWER a. absent in prokaryotic cells and present in eukaryotic cells E. coli is a useful model system for molecular biology studies because: a. it has a smal...

Biology, Module 2: midterm exam question and answers complete 2024 How to calculate magnification Magnification = image size/actual size Two stages of cell fractionation Halogenation, ultracentrifugation Why is the tissue placed in a cold, buffered solution for cell fractionation? Cold to reduce enzyme activity that might break down organelles, Buffered as pH can alter structure of organelles, or function of enzymes Why is the tissue placed in a solution of the same water potenti...

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...

AQA A level Biology Revised Questions And Answers 2023 Describe how you would use a biochemical test to show that a solution contained a nonreducing sugar, such as sucrose. [3] - CORRECT ANSWER-,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] - CORRECT ANSWER-(Crush in)...