Catalyse Guides d'étude, Notes de cours & Résumés

IB Biology Topic 1: Cell Biology Questions and Answers Already Passed What does cell theory state? That cells are the smallest possible unit of life and that living organisms are made up of cells. What are unicellular organisms? Give two examples Unicellular organisms are organisms with only one cell, such as Paramecium and Chlamydomonas. In unicellular organisms the one cell carries out all of the functions of life. Why are large organisms multicellular? Because of surface area to ...

CBE 205 Final Central dogma - correct answer -DNA to RNA to Protein -Replication-Transcription-Translation Watson and crick base pairing - correct answer -DNA: Adenine (A) to Thymine (T), Guanine(g) with cytosine (C) -RNA only change is A to U Replication - correct answer -Copying DNA -DNA polymerase catalyse the addition of DNA (deoxynucleotides) DNA -Primer is need to start new strand Direction of DNA synthesis - correct answer - 5' to 3' Major enzymes in DNA replication - ...

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...

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 is standard deviation? -Answer a computed measure of how much scores vary around the mean score What is a serial dilution? -Answer used to obtain a series of solution whose concentrations differ by known amounts Why do we measure initial rate of reaction? -Answer Reaction can be controlled, as when reaction starts substrate concentration will decrease fast What does catalase catalyse? -Answer break down of hydrogen peroxide to water and oxygen gas What does coppe...

AQA A LEVEL YEAR 1 AND AS BIOLOGY DEFINITIONS EXAM | QUESTIONS & 100% CORRECT ANSWERS (VERIFIED) | LATEST UPDATE | GRADEA+ antigen Correct Answer: a molecule that triggers an immune response antibiotic Correct Answer: a substance produced by living organisms that can destroy the growth of organisms active transport Correct Answer: movement of a substance from a region of low concentration to a region of high concentration which requires metabolic energy allele Correct Answer: ...

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 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...

Polysaccharide - ANSWERMany monosaccharides joined together by a condensation reaction Activation energy - ANSWERenergy required to bring about a reaction, it is lowered by presence of enzyme active site - ANSWERa group of amino acids that make up a region of the enzyme where a substrate binds to catalyse a reaction enzyme - ANSWERa protein that acts as a biological catalyst tertiary structure (protein) - ANSWERfolding of a polypeptide chain and contains disulfide bridges, hydrogen +...