Ace your Cambridge International AS Level Biology (9700) exam with our comprehensive guide. Master critical terminology, tackle practical drawing rules, and learn core calculations including magnification and serial dilutions to secure maximum marks.
阅读时间 6 分钟更新于: 2026年6月21日
试卷概览
卷数
3
总分
140
考试时间
4小时 30分钟
题型
3
试卷
时间
分数
题数
比重
题型
Paper 1 Multiple Choice
1小时 15分钟
40
40
31%
選擇題
Paper 2 AS Level Structured Questions
1小时 15分钟
60
6
46%
結構題
Paper 3 Advanced Practical Skills 2
2小时
40
2
23%
Practical Skills
评级
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计算器规定
A silent scientific calculator is required where the syllabus permits one. It must NOT be graphical, programmable, or capable of symbolic algebra (CAS), and it must contain no stored programs or notes.
AO1: AO1: Knowledge with understanding (40%)
AO2: AO2: Handling information and solving problems (40%)
AO3: AO3: Experimental skills and investigations (20%)
根据历届试题与评分标准整理（2023–2025）。
计算器程序
Table mode for roots & turning points
Scientific calculator (e.g. Casio fx-991 series)
用途: Tabulate \(y\) across a range of \(x\) to locate sign changes (roots) and approximate maxima/minima.
使用时机: Solving or sketching a function when you want to find where its graph crosses or turns.
步骤
Enter the function in TABLE mode, set the start, end and step, then read where the sign of \(y\) changes or where it peaks.
考试提示: Allowed, but the calculator must be silent, non-graphical, non-programmable and free of stored content; always show the working the mark scheme requires.
Statistics mode (mean, SD & regression)
Scientific calculator (e.g. Casio fx-991 series)
用途: Read the mean \(\bar{x}\) and standard deviation directly, and the gradient/intercept (and \(r\)) of a linear regression for bivariate data.
使用时机: Any data-handling, statistics, or required-practical analysis question.
步骤
Enter the data in STAT mode (1-VAR or A+BX), then recall \(\bar{x}\), \(\sigma\) or the regression coefficients.
考试提示: Allowed, but the calculator must be silent, non-graphical, non-programmable and free of stored content; always show the working the mark scheme requires.
Carry exact values with Ans & memory
Scientific calculator (e.g. Casio fx-991 series)
用途: Keep full-precision intermediate values to avoid rounding errors.
使用时机: Multi-step calculations where premature rounding loses the final accuracy mark.
步骤
Use Ans, STO/RCL or the M+ memory to reuse the unrounded result of each step; round only the final answer.
考试提示: Allowed, but the calculator must be silent, non-graphical, non-programmable and free of stored content; always show the working the mark scheme requires.
Equation solver — to CHECK your working
Scientific calculator (e.g. Casio fx-991 series)
用途: Use the built-in EQN/SOLVE mode to verify roots of quadratics or simultaneous equations you have already solved by algebra.
使用时机: As a check only, after solving by hand.
步骤
Enter the coefficients in EQN mode (or use SOLVE) and confirm they match your worked solution.
考试提示: Allowed, but the calculator must be silent, non-graphical, non-programmable and free of stored content; always show the working the mark scheme requires.
常见错误
1high涉及分数: 1Cell membranes and transport (Biology (AS Level))
Using the general term 'cell membrane' instead of the precise 'cell surface membrane' or 'plasma membrane'.
如何避免: Always refer to the outer boundary of an animal cell as the 'cell surface membrane' or 'plasma membrane' when describing its location, structure, or function.
2high涉及分数: 2The microscope in cell studies
Failing to convert millimeter measurements to micrometers during magnification calculations, leading to answers off by a factor of 1000.
如何避免: Always multiply your millimeter measurement by 1000 to convert to micrometers (µm) before substituting values into the magnification formula (A = I/M or M = I/A).
3medium涉及分数: 1Transport of oxygen and carbon dioxide (Transport in mammals)
Omitting the word 'ion' when discussing physiological shifts, such as chloride or hydrogen carbonate movements.
如何避免: Specifically state 'chloride ions' or 'hydrogencarbonate ions' to satisfy both scientific and chemical precision requirements.
4high涉及分数: 3The microscope in cell studies
Drawing plant tissue plans in Paper 3 with shaded structures, sketchy/shaky lines, or drawing individual cells in a low-power diagram.
如何避免: Use a sharp HB pencil to draw clean, thin, single, non-overlapping, and unshaded lines. Only draw tissue boundaries for low-power plans; do not draw individual cells.
5high涉及分数: 2Antibiotics (Infectious diseases)
Believing that penicillin digests or breaks existing cross-links in mature bacterial cell walls.
如何避免: Understand that penicillin is an enzyme inhibitor that targets transpeptidase, preventing the formation of *new* peptide cross-links during cell wall synthesis in growing bacteria.
6medium涉及分数: 1The gas exchange system
Confusing the physiological function of smooth muscle with elastic tissue/fibres in airways.
如何避免: Associate smooth muscle with active contraction and constriction of the airway, and elastic fibres with stretching and passive recoil to help expel air during exhalation.