Aqa a level biology 2022 - Study guides, Class notes & Summaries

AQA A LEVEL BIOLOGY 2022 PAPER 3 EXAMQUESTIONS AND MARKING SCHEME

This is the Mark scheme for the AQA A level Biology - Paper 2 June 2022 exam paper. The document is official and only sold for a limited time. It is locked on the AQA website. This is normally used as mock exams by your teachers !!

________________________________________ Explain why plasma membranes are said to have a fluid mosaic structure. - ANSWER1. Fluid because the phospholipids are constantly moving. 2. Mosaic because the proteins are scattered throughout the membrane-like tiles in a mosaic. What effect does cholesterol have on the cell membrane? - ANSWER1.Cholesterol molecules fit between the phospholipids and bind to the hydrophobic tails of the phospholipids. 2.Causes them to pack together more closely, restr...

AQA A-level BIOLOGY 7402/1 Paper 1 Question Paper + Mark scheme [MERGED] June 2022

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 7402/2 Paper 2 Question Paper + Mark scheme [MERGED] June 2022 *jun* IB/M/Jun22/E12 7402/2 For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 9 10 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. • You must answer the questions i...