Catalyse - Guides d'étude, Notes de cours & Résumés

What are proteins? Big molecules that do lots of important jobs in our bodies What do proteins do? They catalyse reactions (enzymes) They help bind cells into tissues They can be antibodies which protect us from pathogens They transport materials What are proteins made up of? Proteins are made up of amino acids How do amino acids join together? OH and H react then H2O is kicked out as water molecule. Then a branch forms between the 2 amino acids. Called a condensation reaction ...

AQA A-level BIOLOGY 7402/2 Paper 2 Question Paper & Mark scheme June 2023 VERIFIED100%. Chemical digestion - -Hydrolyses large, insoluble molecules What is digestion - -Physical breakdown Chemical digestion Physical breakdown - --Breakdown of food into absorbable nutrients - By teeth - Stomach muscles - increases SA What is the importance of digestion? - -Hydrolyses large food molecules into smaller molecules Which can move across cell membrane And be absorbed into the blood Oe...

0 1 . 1 Which statement about the function of ribosomes is correct? Tick () one box. [1 mark] Site of transcription, catalyse the joining of amino acids by hydrolysis reactions Site of transcription, catalyse the joining of nucleotides by condensation reactions Site of translation, catalyse the joining of amino acids by condensation reactions Site of translation, catalyse the joining of nucleotides by hydrolysis reactions 0 1 . 2 Name two biological molecules that can b...

OCR AS LEVEL BIOLOGY A H020/01 JUNE 2022 ACTUAL QUESTION PAPER - Breadth in Biology. SECTION A You should spend a maximum of 25 minutes on this section. Write your answer for each question in the box provided. Answer all the questions. 1 The graph below shows the results of an osmosis experiment investigating the effect of changing the concentration of sodium chloride (NaCl) on mass of potatoes. 10 5 Percentage change in 0 mass –5 –10 Which concentration of NaCl causes equal mo...

What type of reactions do organisms need to carry out to survive? - Answer Metabloic Reactions What is a catalyst? - Answer A chemical that speeds up the rate of reaction and remains unchanged and reusable at the end of the reaction What are biological catalysts for metabolic reactions? - Answer enzymes any molecule that can have a reaction catalaysed by an enzyme is called a ... - Answer Substrate What is an enzymes turn-over number? - Answer The number of substrates an en...

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...

OCR AS LEVEL BIOLOGY A H020/01 JUNE 2022 ACTUAL QUESTION PAPER - Breadth in Biology. SECTION A You should spend a maximum of 25 minutes on this section. Write your answer for each question in the box provided. Answer all the questions. 1 The graph below shows the results of an osmosis experiment investigating the effect of changing the concentration of sodium chloride (NaCl) on mass of potatoes. 10 5 Percentage change in 0 mass –5 –10 Which concentration of NaCl causes equal mo...

GCSE Biology - Topic 2 - Cell Organization (AQA) Graded A+ Cells Basic building blocks that make up all living organisms Specialised Cells Cells that have differentiated (changed) to become specialised to carry out a particular function Brainpower Read More At what stage does differentiation occur? During the development of a multicellular organism Put these body parts in order of size, from smallest to largest: cell; organ systems; atom; organ; tissue; molecule (1) atom ...

OCR AS LEVEL BIOLOGY A H020/01 JUNE 2022 ACTUAL QUESTION PAPER - Breadth in Biology. INSTRUCTIONS • Use black ink. You can use an HB pencil, but only for graphs and diagrams. • Write your answer to each question in the space provided. If you need extra space use the lined pages at the end of this booklet. The question numbers must be clearly shown. • Answer all the questions. • Where appropriate, your answer should be supported with working. Marks might be given for using a correc...

AQA AS BIOLOGY Paper 2 Thursday 25 May 2023 Morning Time allowed: 1 hour 30 minutes Materials For this paper you must have: • a ruler with millimetre measurements • a scientific calculator. Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions. • You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages. • If you need extra space ...