This resource is aimed at high ability GCSE biology students or A-level students. It is an application task and is designed to test understanding of the key stages involved with transport and exchange of respiratory gases. In most animals, there are different phases of gas exchange: breathing, exchange of gases at the alveolus, transport of gases by the circulatory system, and exchange of gases with tissues. The worksheet requires students to identify which stage(s) are interfered with due to various diseases and disorders.

A resource aimed at post-16 biology students, this worksheet contains a list of written instructions for students to draw in order to recreate a diagram of a typical prokaryotic cell. This task can be given to the whole class and then a printed diagram of a prokaryotic cell given out at the end of the activity for students to compare their drawing to; alternatively the class can be divided into two at the start of the lesson - half get a diagram of a prokaryotic cell and are asked to describe each structure while the other half get this worksheet and are asked to draw a diagram; the two halves of each class can then be asked to verbally feedback to each other. This is a useful way of turning an otherwise dry topic into an involving and engaging activity. The worksheet finishes by asking students to research the role of each organelle. Key words: DNA, prokaryotic, nucleus, chromosome, flagellum, pilus, cell wall, murein, mesosome, ribosome, plasmid

A worksheet aimed at biology students aged 14-18 years, this resource provides a series of prompts and questions to help students plan an investigation into osmosis. The practical investigation is a classic one involving potato chips and different concentrations of sucrose solution - the worksheet asks students to consider the variables involved, the range and concentrations of sucrose solution required and then asks students to produce a written plan based on these considerations.

A worksheet aimed at advanced level biology students, this resource requires students to calculate the magnification of a mitochondrion by making simple measurements and unit conversions. The final questions are 'challenge questions' that require deeper thought: why mitochondria are required for every cellular activity, the raw materials needed by a mitochondrion and the resolution required to observe mitochondria using a TEM. This worksheet is a useful starter or plenary task to review a previous lesson on these topics.

A worksheet aimed at advanced level biology students who are just commencing a topic on photosynthesis. The worksheet can be set as a homework exercise prior to the topic commencing so that students have a head start on their understanding. The worksheet includes various prompts to focus their research along with a weblink for more detailed information. Keywords: photosynthesis, photosystems, chloroplasts, light dependent reaction, light independent reaction

A resource aimed at advanced biology students, this worksheet provides a written schedule for the extraction of chlorophyll from leaves followed by analysis via chromatography. Rf values for various pigments are included in a reference table (including chlorophyll a, chlorophyll b, phaeophytin, xanthophyll and carotene); students can attach their chromatograms to the worksheet, calculate Rf values for each pigment and identify using the reference table. This is a good practical exercise to cover at the start of a topic on photosynthesis, and emphasises the fact that various pigments are responsible for harnessing light energy during the light dependent reactions. Key words: Light dependent, chlorophyll, Rf value, chromatography, chromatogram, solvent front, extraction, leaf, phaeophytin, xanthophyll, carotene, absorption spectra, action spectrum

A resource aimed at advanced biology students, this worksheet contains question requiring students to convert measurements between millimetres, micrometres and nanometres; the final two questions require students to make measurements in order to work out the magnification of a louse and the real size of a red blood cell. This worksheet is ideal as a starter activity to recap a lesson on magnification and units of measurement.

A collection of four worksheets aimed at advanced biology students. The first two worksheets require students to suggest appropriate units of measurements for typical investigations and then introduce the idea of converting between millimetres, micrometres and nanometres - an important skill that is required on most exam papers. The last two worksheets require students to practise their skills in making measurements and calculating magnification of cell images and diagrams, including the use of a scale bar.

A worksheet aimed at advanced biology students consisting of a lengthy passage of text on the topic of passive and active transport. The passage requires key words to be added in the appropriate places. Once complete, students have a written record summary of both passive and active transport processes. This is a good activity to complete at the end of this topic and reinforces key words and vocabulary with students. Suggested answers to each missing space are given at the end of this worksheet

A worksheet aimed at biology students, this resource is designed to practice calculation of percentage changes and designing control experiments for biology investigations. Both skills are often demanded of biology students in examinations and they both tend to be skills that often pose difficulties.

A worksheet aimed at advanced level biology students, this resource provides a lengthy written passage about the structure and function of cell organelles. The worksheet provides a useful written summary of organelle function in eukaryotic cells for student's revision notes but also requires students to process this information in order to label a diagram of animal cell ultrastructure and explain differences between animal and plant cells.

A worksheet aimed at advanced biology students studying the processes of active transport. The worksheet serves as a neat summary exercise, ensuring students know the difference between process such as carrier-mediated transport, channel mediated transport, endocytosis, exocytosis, excretion and secretion. This activity is best used as either a starter or plenary activity at the end of a topic on membranes and transport.

Biology students often struggle to calculate rates of reaction from graphs. This worksheet provides an explanation of how to calculate rates of reaction from graphs followed by two practice examples. This is a useful worksheet to use as preparation for any practical investigation that will require this skill with data analysis.

A collection of four worksheets that cover gas exchange in cells, lung structure, gas exchange at alveolus and ventilation. The worksheets are aimed at either high ability GCSE students or A-Level students and could be used as either starter tasks, plenaries or homework exercises to consolidate knowledge. Key words: gas exchange, ventilation, alveolus, cells, lungs, trachea, bronchus, bronchioles, intercostal muscles, diaphragm, volume, pressure

A resource aimed at advanced biology students, this worksheet is a starter or plenary exercise that requires students to draw out a biochemical flow chart showing the sequence of events that occur during glycolysis. After this initial memory recap, students are then required to answer a series of questions about the process which checks that they understand the key points. Key words: glycolysis, pyruvate, glucose, NAD, reduction, oxidation, coenzyme, ATP, energy, ADP, cytoplasm, anaerobic, triose phosphate

A worksheet aimed at advanced biology students that aims to recap some of the basic facts about respiration and bridge the gap between GCSE ideology and advanced level study. The worksheet contains several questions that focus on a recap of the basic summary equation, reasons why the summary equation can be misleading, the nature of ATP hydrolysis, exergonic reactions and the site of different stages of aerobic respiration. There is a final synoptic challenge question that requires students to explain how glucose from our diet is transported to respiring cells. Answers to all questions are given on the second page of this worksheet. Key words: respiration, ATP, glucose, exergonic, mitochondria, cytoplasm, aerobic, anaerobic, energy, glycolysis, link, Kreb's cycle, electron transport chain, synoptic, amylase, starch, digestion, ingestion, maltase, maltose, absorption, insulin, epithelial cell, co-transporter, sodium

A resource aimed at advanced biology students, this is a practical activity worksheet that concisely describes the classic experiment involving methylene blue as an artificial hydrogen acceptor in respiration. The experiment involves setting up three test tubes (two with yeast and methylene blue, one without yeast as a control) and observing the decolouration of methylene blue as it is gradually reduced due to the respiratory activity of yeast. The activity sheet contains the technical details of solutions required, a table for students to record their observations and a series of questions that probe student's understanding of the biochemistry involved with these observations. Answers to the questions are provided on the second, duplicate, worksheet. Key words: Respiration, glucose, NAD, methylene blue, reduction, oxidation, yeast, control

A resource aimed at advanced level biology students, this worksheet requires students to identify each key component of a chloroplast and link to its role in photosynthesis. This is a useful starter activity that can be used following an initial lesson on the basics of chloroplast structure or it could be used as a homework research task before teaching a topic on photosynthesis. Answers to all of the questions are provided on the second worksheet. Key words: chloroplast, photosynthesis, chlorophyll, absorb, light, light dependent, light independent, thylakoid, stroma, envelope, photosystems, granum, grana, starch

A worksheet for A-Level Biology students, for use after the main statistical tests have been taught. Students often learn statistical tests by rote, but lack the independence of thought to select appropriate statistical tests for an investigation they have designed. This worksheet provides various examples of possible titles for quick and simple investigations that can be done in the space of a lesson or for homework - students must then select the appropriate statistical test to analyse their results. Key words: Statistics, Chi-squared, 95% confidence limits and standard error, spearman rank, independent, investigation, biology, A-Level

A worksheet aimed at A-Level Biology students which sets out a series of research tasks for students to learn about the nitrogen cycle. A good resource to use at the start of this topic as homework or in class by dividing out each piece of key research among the class. Internet websites are listed which provide useful animations and information for students to use as they complete their research. Key words: nitrogen cycle, deamination, ammonification, denitrification, nitrification, nitrogen fixation, nitrogen, ammonia, nitrite, nitrate, ammonium ions, symbiotic