Cambridge International A Level Biology Revision Guide

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Cambridge International AS and A Level Biology Presentation of data and observations recording data and observations ■■ ■■ construct tables correctly, with correct headings and using a ruler present data or observations for an experiment or investigation in a single table (unless instructed otherwise) ■■ complete tables fully and to the required level of detail (e.g. all to same number of decimal places) ■■ organise Venn diagrams etc. correctly to show data displaying calculations and reasoning ■■ ■■ ■■ give the formulae used for calculations show working round answers correctly ■■ show the key steps in your reasoning data layout ■■ plot an accurate graph with carefully chosen scales and good use of space ■■ draw accurate, labelled drawings with good use of space Analysis, conclusions and evaluation interpreting data or observations and identifying sources of error ■■ ■■ ■■ ■■ describe patterns or trends identify anomalous results comment on the confidence that can be placed in your conclusions use a graph to make interpolations or extrapolations ■■ make comparisons between specimens ■■ describe controls that could be carried out ■■ identify sources of error (e.g. with use of experimental equipment, sample removal, result recording and judging end-points) ■■ calculate percentage errors drawing conclusions ■■ ■■ use biological knowledge to explain results use biological knowledge to answer questions about diagrams etc. ■■ comment on predictions and hypotheses suggesting improvements Suggest: ■■ variables not controlled and how to control them ■■ taking replicates (repeat readings) and calculating means ■■ ways to modify an experiment to improve accuracy, reliability, etc. ■■ extensions to an experiment Cambridge International AS and A Level Biology © Cambridge University Press 2014
Cambridge International AS and A Level Biology Suggestions on how to approach a written examination of practical skills Introduction A written examination of practical skills will assess the practical skills that you have developed during your course. It is not a practical examination, but it may assess the following skills: ■■ ■■ ■■ ■■ planning of experiments and investigations analysing data from experiments or observations making conclusions from these data evaluating experimental procedures, investigations and data. The questions in a paper of this type will be based on themes chosen from topics across the whole syllabus. For example, you may need to use your knowledge and understanding of enzymes to answer questions on immobilised enzymes and respiration if these are the themes for the questions. Planning skills are usually assessed by a piece of extended writing that can be presented in a variety of ways. It does not have to be a piece of continuous prose. Often a plan could contain a numbered list of instructions for carrying out an investigation. Advice on tackling questions To familiarise yourself with the contents of the entire paper and to avoid running out of time and missing some part-questions that you would find easy to answer, you should check through the entire paper before you start. You could: Benefit Disadvantage skim read the entire exam quick overview a quick skim read may mean that you miss something or may not allow full understanding of what you have to do read carefully through the entire exam gives a chance to digest and take on board what you have to do may take too long and give you less time to write Try to estimate how long each question will take to answer. It may seem that you have a lot of time, but there is a lot of reading and thinking involved. A rough guide is to allow 15 minutes for reading the entire paper at the beginning and then at the end to check responses and add any extra points, then divide up the remaining time evenly per mark or per question. You may decide that one question will be easier for you than the other(s) and, according to your preference, decide which question you want to answer first. Each question needs to be given careful attention. You could: Benefit Disadvantage read the entire first question before re-reading and responding to each part-question read each part-question once, consider a response, re-read and give a written response better overview of what is required and some later part-questions may be of some help for earlier parts you can focus all your attention on the part-question in hand overall reading time may be slightly longer you may write something that is more relevant for a later partquestion Cambridge International AS and A Level Biology © Cambridge University Press 2014
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Mary Jones, Richard Fosbery, Jennif
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University Printing House, Cambridg
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Cambridge International AS Level an
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Cambridge International AS Level Bi
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Chapter 1: Cell structure Ultrastru
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Chapter 1: Cell structure The nucle
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Chapter 1: Cell structure respirati
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Chapter 2: Biological molecules A c
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Chapter 2: Biological molecules The
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Chapter 2: Biological molecules Pro
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Chapter 2: Biological molecules Glo
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Chapter 2: Biological molecules a b
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Chapter 2: Biological molecules ■
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Chapter 2: Biological molecules 7 T
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Chapter 1: Cell structure Chapter 3
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Chapter 3: Enzymes Mammals such as
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Chapter 3: Enzymes QUESTION 3.2 Why
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Chapter 3: Enzymes Enzyme inhibitor
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Chapter 3: Enzymes results to plot
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Chapter 3: Enzymes BOX 3.2: Immobil
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Chapter 3: Enzymes 2 In a reaction
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Chapter 3: Enzymes b c The molecule
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Chapter 3: Enzymes no inhibitor inh
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Chapter 1: Cell structure Chapter 5
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Chapter 7: Transport in plants a b
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Chapter 7: Transport in plants a ph
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Chapter 7: Transport in plants End-
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Chapter 8: Transport in mammals 157
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Chapter 8: Transport in mammals Key
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Chapter 10: Infectious diseases Ver
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Chapter 10: Infectious diseases QUE
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Chapter 10: Infectious diseases End
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Chapter 10: Infectious diseases 8 a
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Chapter 11: Immunity Smallpox was f
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Chapter 11: Immunity Phagocytes Pha
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Chapter 11: Immunity Some of these
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Chapter 11: Immunity variable regio
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Chapter 11: Immunity secrete cytoki
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Chapter 11: Immunity Concentration
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Chapter 11: Immunity Antigenic conc
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Chapter 11: Immunity Autoimmune dis
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Chapter 11: Immunity antigen inject
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Chapter 11: Immunity Summary ■■
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Chapter 11: Immunity 3 Which of the
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Chapter 11: Immunity 10 a Rearrange
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Chapter P1: Practical skills for AS
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Chapter 14: Homeostasis The hypotha
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Chapter 14: Homeostasis The structu
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Chapter 14: Homeostasis The kidney
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H 2 O H 2 O Na 5 Key part of the as
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Chapter 14: Homeostasis How ADH aff
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Chapter 14: Homeostasis The control
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Chapter 14: Homeostasis A decrease
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Chapter 14: Homeostasis Stomata sho
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Chapter 14: Homeostasis End-of-chap
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Chapter 14: Homeostasis 8 An invest
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Chapter 15: Coordination 329 Learni
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Chapter 15: Coordination central ne
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Chapter 15: Coordination A reflex a
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Chapter 15: Coordination Structure
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Chapter 15: Coordination The mornin
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Chapter 15: Coordination Summary
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Chapter 15: Coordination 3 Which of
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Chapter 15: Coordination 9 A biopsy
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Chapter 15: Coordination 12 Gibbere
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Chapter 16: Inherited change Katydi
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Chapter 17: Selection and evolution
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Chapter 18: Biodiversity, classific
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Cambridge International A Level Biology Revision Guide

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