Aqa a level biology cells - 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...

Detailed and comprehensive AQA biology A-level, cells module revision notes. High-quality detailed notes with diagrams and images. Notes directly reflective of the specification with exam technique in mind, with key terms and definitions.

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 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 Chapter 3.2 – Cells Exam || All Questions & Answers (Rated A+) AQA A-Level Biology Chapter 3.2 – Cells Exam || All Questions & Answers (Rated A+) Structure of Nucleus. - ANSWER - 1. Nuclear envelope: double membrane surrounding nucleus, outer membrane continuous with the (R)ER of the cell. 2. Nuclear pores: allow the passage of larger molecules, such as mRNA, out of the nucleus. 3. Nucleoplasm: granular, jelly-like material making up the bulk of the nucleus. ...

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AQA A-Level Biology. 3.2 – Cells Text Questions and Answers 100% Solved Structure of Nucleus. 1. Nuclear envelope: double membrane surrounding nucleus, outer membrane continuous with the (R)ER of the cell. Nuclear pores: allow the passage of larger molecules, such as mRNA, out of the nucleus. Nucleoplasm: granular, jelly-like material making up the bulk of the nucleus. Chromosomes: protein-bound, linear DNA. Nucleolus: small spherical region(s) in nucleoplasm. Manufactures ribosomal R...

AQA A-Level Biology. 3.2 - Cells. Exam Questions and Answers

AQA A-Level Biology. 3.2 – Cells Questions and Answers Already Passed Structure of Nucleus. 1. Nuclear envelope: double membrane surrounding nucleus, outer membrane continuous with the (R)ER of the cell. 2. Nuclear pores: allow the passage of larger molecules, such as mRNA, out of the nucleus. 3. Nucleoplasm: granular, jelly-like material making up the bulk of the nucleus. 4. Chromosomes: protein-bound, linear DNA. 5. Nucleolus: small spherical region(s) in nucleoplasm. Manufactures rib...

AQA A-level Biology Paper 1 Latest Update A vaccine can be used to produce immunity. Describe how memory cells are important in this process. (3) - ANSWER-important because when individual is in contact with virus again, antibodies can be produced at a faster rate in a secondary immune response, and so the pathogen can be destroyed faster. abiotic - ANSWER-non-living artery structure - ANSWER-thick muscle layer so that they can dilate and contract to smooth blood flow. thick elastic layer so...