Aqa biology a level cell - Study guides, Class notes & Summaries

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 the...

AQA A LEVEL BIOLOGY Paper 1 2024 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 proteins embedded ...

Detailed biology essay plans for AQA A-Level [Paper 3]. Essay titles include: - THE IMPORTANCE OF ORGANISMS BEING ABLE TO RESPOND TO THEIR INTERNAL AND EXTERNAL ENVIRONMENTS -IMPORTANCE OF ENERGY TRANSFERS WITHIN AND BETWEEN ORGANISMS - IMPORTANCE OF TRANSFERS OF SUBSTANCES WITHIN ORGANISMS & BETWEEN ORGANISMS AND THEIR ENVIRONMENT - CELLS & ORGANISMS CARRY OUT EXCHANGES WITH THEIR EXTERNAL ENVIRONMENT TO MAINTAIN THEIR INTERNAL ENVIRONMENT - THE IMPORTANCE OF MICROORGANISMS/ BACTERIA IN B...

AQA Biology A level cell structure Exam with Correct Answers AQA Biology A level cell structure Exam with Correct Answers AQA Biology A level cell structure Exam with Correct Answers AQA Biology A level cell structure Exam with Correct Answers AQA Biology A level cell structure Exam with Correct Answers AQA Biology A level cell structure Exam with Correct Answers AQA Biology A level cell structure Exam with Correct Answers AQA Biology A level cell structure Exam with Correct Answers AQA Biology ...

AQA A-level BIOLOGY 7402/1 Paper 1 Question Paper + Mark scheme [MERGED] June 2022 *jun* IB/M/Jun22/E12 7402/1 For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 9 TOTAL Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature I declare this is my own work. Time allowed: 2 hours Materials For this paper you must have: • a ruler with millimetre measurements • a scientific calculator. Instructions • Use bl...

AQA A-level BIOLOGY 7402/3 Paper 3 Question Paper + Mark scheme [MERGED] June 2022 *jun* IB/M/Jun22/E10 7402/3 For Examiner’s Use Question Mark 1 2 3 4 5 6 TOTAL Time allowed: 2 hours 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 in Section A. • Answer one question from Secti...

AQA A LEVEL BIOLOGY Paper 1 2024 Exam QUESTIONS & ANSWERS( A+ GRADED 100% VERIFIED)

AQA A LEVEL BIOLOGY Paper 1 Latest Update Cell vacuole (plants) - ANSWER-Found in cytoplasm. Contains cell sap. Membrane surrounding this is called the tonoplast. Maintains pressure inside the cell, keeping cell rigid/stops wilting. Cell wall - ANSWER-Made of murein (glycoprotein).

AQA A-Level Biology Comprehensive Exam || All Questions & Answers (Graded A+) AQA A-Level Biology Comprehensive Exam || All Questions & Answers (Graded A+) Describe the role of a ribosome in the production of a polypeptide. /3 - ANSWER - 1. mRNA binds to ribosome; 2. Idea of TWO codons/binding sites; 3. tRNA with ANTICODONS binds; 4. (Catalyses) formation of PEPTIDE bond between AMINO ACIDS (held by tRNA molecules); 5. Moves along (mRNA to the next codon); Describe the structure of g...

AQA A LEVEL BIOLOGY PAPER 1 WITH QUESTIONS AND WELL VERIFIED ANSWERS[GRADED A+] NEW!!NEW!!! 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 is the function of cholesterol in the CSM? - ANS---Make phospholipids pack more closely together, restricting the movement of the phospholipids, making the membrane less fluid/more rigid. What is simple diffusion? - ANS---The (passive) movement of p...