The cards Question Besides water and minerals, which three kinds of biological molecule are organisms made of? Tap to flip Answer Carbohydrates, proteins and lipids (including fats). Question What do organisms use carbohydrates, proteins and lipids to build? Tap to flip Answer Cell structures, including membranes and organelles. Question What is a polymer? Tap to flip Answer A molecule made of many repeated units. Question Carbohydrates are polymers made of what units? Tap to flip Answer Sugars. Question Proteins are polymers made of what units? Tap to flip Answer Amino acids. Question Which two units are lipid molecules made of? Tap to flip Answer Fatty acids and glycerol. Question What is a reagent? Tap to flip Answer A chemical used to test for a type of biological molecule. Question Which reagent is used to test for reducing sugars such as glucose? Tap to flip Answer Benedict's solution. Question Which reagent is used to test for starch? Tap to flip Answer Iodine solution. Question Which reagent is used to test for protein? Tap to flip Answer Biuret solution. Question Which substance is used to test for lipids? Tap to flip Answer Ethanol (a type of alcohol). Question What is a qualitative test? Tap to flip Answer A test whose result is based on an observation. Question What is a quantitative test? Tap to flip Answer A test in which a measurement produces numerical data. Question What kind of carbohydrate is starch? Tap to flip Answer A polysaccharide: a polymer of sugar. Question Which three elements make up all carbohydrates, proteins and lipids? Tap to flip Answer Carbon, hydrogen and oxygen. Question Which element do all proteins and some lipids also contain? Tap to flip Answer Nitrogen. Question Where do producers obtain carbon and oxygen from? Tap to flip Answer The air. Question Where do producers obtain hydrogen from? Tap to flip Answer Water. Question Where do producers obtain nitrogen from? Tap to flip Answer The soil. Question Can consumers use carbon from carbon dioxide in the air to make biological molecules? Tap to flip Answer No; only producers can do that. Question How do consumers get all their carbon and nitrogen? Tap to flip Answer By eating producers. Question What does autotrophic mean? Tap to flip Answer Able to make its own food, as a plant or other producer does. Question What is a consumer? Tap to flip Answer An organism that must eat other organisms to obtain food. Question What does photosynthesis convert carbon dioxide and water into? Tap to flip Answer Glucose and oxygen. Question What does abiotic mean? Tap to flip Answer The non-living parts of an ecosystem, such as the atmosphere. Question What is an enzyme? Tap to flip Answer A protein that acts as a biological catalyst. Question What is a catalyst? Tap to flip Answer A substance that speeds up a reaction without being used up. Question Why are enzymes needed to support life? Tap to flip Answer Without them, many reactions would happen too slowly to support life. Question What is the active site of an enzyme? Tap to flip Answer The part of the enzyme where the substrate binds. Question What is a substrate? Tap to flip Answer The substance that an enzyme acts upon. Question Which model explains how an enzyme and its substrate interact? Tap to flip Answer The lock and key model. Question How many different reactions can one enzyme catalyse? Tap to flip Answer Only one. Question What is the rate of a reaction? Tap to flip Answer The amount of change (e.g. substrate broken down or product made) per unit of time. Question What is concentration? Tap to flip Answer A measure of the quantity of a dissolved substance in a given volume of solution. Question What does optimum mean for an enzyme reaction? Tap to flip Answer The conditions under which the maximum rate of reaction occurs. Question How does enzyme reaction rate change as substrate concentration increases? Tap to flip Answer It increases until an optimum, when all active sites are full. Question Why does enzyme reaction rate increase with temperature up to the optimum? Tap to flip Answer There are more collisions. Question Why does enzyme reaction rate fall when temperature rises above the optimum? Tap to flip Answer The active site becomes denatured. Question What does denatured mean for an enzyme? Tap to flip Answer Its shape has changed permanently, which stops it from working properly. Question At high temperatures, do enzymes die or denature? Tap to flip Answer They denature. Question What is pH? Tap to flip Answer A measure of how acidic or alkaline a solution is. Question What does the enzyme amylase break starch down into? Tap to flip Answer Maltose (a type of sugar). Question Why does enzyme reaction rate fall at pH values below and above the optimum? Tap to flip Answer The active site becomes denatured. Question What is the end point of a chemical reaction? Tap to flip Answer The point at which the reaction has finished. Where this deck sits in the curriculum Curriculum National Curriculum for England Stage GCSE (Years 10–11) Course GCSE Biology Unit Biological molecules and enzymes Exam boards AQA, Edexcel, OCR Tiers foundation and higher England's National Curriculum sets what is taught; the units and their order are Oak National Academy's. Flash Feed is not affiliated with Oak or any exam board.
How this deck was checked On 2026-11-02, every card was compared with its source: the lessons of Oak National Academy, a public body funded by England's Department for Education that publishes lessons for the national curriculum. Because the cards come from those lessons, no second source was sought. The comparison was done automatically, not by a teacher, so a card can still be wrong. Flash Feed is not affiliated with any source named here.
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A Biology lesson by Oak National Academy licensed under Open Government Licence (OGL)
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