A worksheet that is aimed at A-Level Biology students, providing data from an investigation into the effect of caffeine on the heart rate of Daphnia. Students are required to use the 95% confidence limits and standard error test to determine whether the results are statistically significant or not. Key words: Statistics, Daphnia, heart rate, caffeine, 95% confidence limits, standard error, standard deviation, significance, null hypothesis

A complete summary of all three main statistical tests required for AQA Biology: 95% confidence limits and standard error, spearman rank and chi-squared. The worksheet focuses on the basic routine of each test rather than getting bogged down with detailed explanations of the theory behind them. A useful resource to give to students as a summary once statistical tests have been taught. Each summary provides data for students to analyse and practice each test. There is also a quick quiz at the start, whereby students need to select the appropriate statistical test for each investigation. Key words: Statistical tests, 95% confidence limits, standard error, chi-squared, spearman rank, maths, degrees of freedom, critical value, probablity, null hypothesis

A practical method sheet for use by A-Level students investigating the effect of temperature on amylase, but also useful for teachers and technicians. Provides simple bullet point instructions that are easy to follow and also a full equipment list. A classic practical in A-Level Biology; please note that the practical procedure requires use of a colorimeter. Key words: Colorimeter, enzyme, amylase, rate, reaction, technician, buffer, iodine, substrate, products, temeprature, denature

This is an activity aimed at KS3-4 lower ability students, enabling them to learn the basics of lock and key theory via model building. The resource shows clear learning objectives includes a step by step series of tasks that gradually develop the model, with key questions for students to answer along the way. The resource also includes a personal learning checklist for completion before and after the lesson to show progress, along with a peer assessment sheet for students to assess each other. Key words: enzyme, substrate, lock and key, active site, denaturation, rate, reaction, products, protein, plasticine, personal learning checklist, peer assessment

A twenty question quiz worksheet on the topic of carbohydrates, Suitable for A-Level biology students, this quiz would be a useful starter exercise to recap key vocabulary and definitions at the end of a topic on carbohydrates. Key words: Carbohydrates, glucose, benedict's, reducing sugar, non reducing sugar, glycogen, cellulose, amylose, amylopectin, starch

This is a worksheet that focuses on how proteins form increasingly complex structures (primary, secondary, tertiary and quaternary). There are extension questions at the end for the more able. The resource is suitable for A-Level Biology students and would be a useful plenary or starter exercise once a lesson on protein structure had been completed. Key words: Protein, amino acids, condensation, peptide, primary, secondary, tertiary, quaternary, conformation

A worksheet that would serve as a useful summary of the main points regarding polymers of alpha glucose. The worksheet covers the formation of amylose, amylopectin and glycogen. It is suitable for A-Level students of biology. Key words: glycogen, glucose, alpha glucose, polymer, polysaccharide, glycosidic, condensation, hydrolysis

This worksheet provides a series of questions on the topic of lipids and triglyceride fats that could be used as a plenary activity after a lesson on this topic has been taught. Key words:lipids, triglyceride, fats, fatty acids, saturated, unsaturated, lipase

Suitable for A-Level Biology, this worksheet provides a series of questions suitable for use as a plenary, on the causes of lactose intolerance. The questions make synoptic links with other topics including biological molecules and enzymes. Key words: Lactose, enzyme, hydrolysis, milk, glucose, galactose

A worksheet with method and subsequent questions (including a higher ability challenge question) on the effect of lipase and bile salts on the breakdown of fat present in milk. A good practical activity for GCSE and A-Level students alike, which demonstrates the impact of bile as an emulsifying agent. Key words: phenolpthalein, milk, ph, bile, fat, triglyceride, temperature, lipase

A worksheet that can serve as either a starter or plenary review of competitive and non-competitive inhibitors. The worksheet ends with a review of end-product inhibition - often missed by students when they revise this topic. Key words: enzyme, inhibitor, active site, competitive, non-competitive, end-product To view more resources: https://www.tes.com/teaching-resources/shop/cmrcarr

This worksheet serves as a recap of the food tests taught in A-Level Biology: Benedict's test for reducing sugars, ethanol emulsion test for fats, biuret test for protein and the iodine test for starch. The resource can be used as either a starter or plenary to recap the reagents required and the expected observations for a positive test. Key words: iodine, starch, benedict's, reducing sugars, non-reducing sugars, biuret, protein, ethanol, emulsion, fat, hydrolysis

A differentiated worksheet on enzymes that begins by recapping some basic knowledge and then provides a method for an investigation into where catalase is found in different organisms. At the end of the investigation, there are various discussion points on the impact of increasing surface area, the effect of high temperatures and how widespread catalase is as an enzyme in organisms from different biological kingdoms. Keywords: Enzyme, substrate, active site, hydrogen peroxide, denatured, liver, potato, surface area

A worksheet to be used as an introduction to enzymes. The weblinks at the bottom of the worksheet link this topic to the some of the neurotoxins and haemolytic toxins found in snake venom - an engaging context to spark the interest of learners.

A worksheet that reviews the basics of enzymes and also introduces the idea of activation energy. Useful for a lesson review after a first introductory lesson on lock and key theory Keywords: Enzyme, substrate, complex, activation energy, active site, denaturation, protein

A worksheet that can be used as a starter or plenary after the first lesson on A-Level Biology carbohydrates. Two different versions of the worksheet are provided with slight differentiation on the factual recall of alpha glucose structure. Keywords: alpha glucose, maltose, condensation, hydroxyl, functional group, monosaccharide

Worksheet starter task to recap the basics of amino acid structure

Worksheet that discusses how plasmids from bacteria are recombined with donor DNA. The worksheet illustrates how screening for bacteria that have successfully taken up modified plasmids works, along with the use of antibiotic resistant marker genes.

This guidance sheet is for use in lesson as an introduction to muscles and the features of synovial joints. The dissection is broken up into several different tasks, each of which have follow up/extension questions that encourage students to make cross links with other topics. Muscles, bone, cartilage, ligaments and tendons are all covered in this activity.

A worksheet that allows students to work through the main points about each blood vessel: artery, arteriole, venule, vein and capillary. Covers aspects of both structure and function of blood vessels.