Ocr biology enzymes Study guides, Revision notes & Summaries

OCR AS LEVEL BIOLOGY A PAPER 1 H020/01 JUNE 2022 MARK SCHEME BREADTH IN BIOLOGY. change in primary structure changes, tertiary structure / 3D shape  (tertiary structure / 3D shape) no longer complementary (to shape of enzyme)  less likely to be broken down by enzymes / enzymesubstrate complexes less likely to form  change in solubility  Max 1 ALLOW change in complementary shape IGNORE takes longer to be broken ALLOW can’t be broken down easily / harder to break down DO...

OCR A Level Biology: Enzymes Practice Exam Questions 2024. What is metabolism? - CORRECT ANSWER The sum of all chemical reactions within cells and organisms What is an anabolic reaction? - CORRECT ANSWER One which builds a molecule or molecules What is a catabolic reaction? - CORRECT ANSWER One which breaks down a molecule or molecules Why do organisms need enzymes in their bodies? - CORRECT ANSWER To act as catalysts for their metabolic reactions What are some of the benefits t...

OCR A-Level Biology Questions And Verified Answers With Complete Answers| Graded A| What is the MAIN role of membranes and what are the other roles? Correct Answer -COMPARTMENTALISATION -site of chemical reactions -cell signalling -cell adhesion How do cell membranes compartmentalise? Correct Answer Membranes are hydrophobic layers that separate different regions of substances dissolved in water. This hydrophobic layer acts as a barrier preventing the movement of hydrophilic molecules f...

OCR A-level Biology – Enzymes Study Guide 2024. Enzymes - CORRECT ANSWER Biological catalysts that interact with substrate molecules to facilitate chemical reactions. Usually globular proteins. Anabolic - CORRECT ANSWER Building up reactions, catalysed by enzymes Catabolic - CORRECT ANSWER Breaking down reactions, catalysed by enzymes Specificity - CORRECT ANSWER Each enzyme can catalyse one biological reaction Activation energy - CORRECT ANSWER Energy needed for the reaction ...

OCR AS Level Biology A H020/01 Sample Question Paper 1 June 2022- Breadth in biology. Section A You should spend a maximum of 25 minutes on this section. Answer all the questions. 1 Young mammals receive antibodies in their mother’s milk. This is an example of which type of immunity? A artificial active immunity B artificial passive immunity C natural active immunity D natural passive immunity Your answer [1] 2 Which of the following descriptions is correct? A Vaccination gives lo...

Excretion - OCR A-Level Biology Test Guide 2024. What is excretion? - CORRECT ANSWER The removal of metabolic waste from the body that may build up and become toxic What are the main excretory products? - CORRECT ANSWER CO2, urea, ammonia, bile pigments Why do we get rid of metabolic waste products? - CORRECT ANSWER They can alter the pH interfering with cell processes so the normal metabolism is affected, they may also inhibit enzymes Why is excess CO2 a problem? - CORRECT ANSWER ...

Detailed A* level notes covering the whole topic of Cloning + Biotechnology (specification point 6.2.1). This is for the OCR A level Biology A course. These notes cover every single specification point within this topic and are concise but contain everything you need to know. I achieved an A* with these notes and am now a medical student. Topics covered: - Plant cloning - Animal cloning - Microorganisms - Biotechnology - Immobilised Enzymes

OCR A-LEVEL Biology – Liver Exam Questions With Correct Answers 2024. Excretion - CORRECT ANSWER Removal of metabolic waste products from the body. Excretion Vs Secretion - Similarities - CORRECT ANSWER 1. Both use ATP. 2. Involve homeostasis. 3.Products released by cells. Excretion Vs Secretion - Differences - CORRECT ANSWER Excretion: 1. Metabolic Waste. 2. Toxins. 3. Removal from Body. 4. NO VESICLES. 5. Urea, CO2, Water. Secretion: 1. Useful Products. 2. Cell Signall...

What is metabolism? - The sum of all chemical reactions within cells and organisms What is an anabolic reaction? - One which builds a molecule or molecules What is a catabolic reaction? - One which breaks down a molecule or molecules Why do organisms need enzymes in their bodies? - To act as catalysts for their metabolic reactions What are some of the benefits that enzymes provide to organisms? - Mean the organism requires less energy to function, meaning it needs to consume less food and c...