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Aqa gcse biology topic 6 – inheritance, variation and evolution, aqa gcse biology topic 7 – adaptations and ecology.
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For each of the exam boards below, there are revision notes, factsheets, questions from past exam papers separated by topic and other worksheets.
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Download the pdf. worksheets below and read t hese explanations regarding common student misconceptions.The topics include:
Carbohydrates
Lipids and Proteins
Cell membrane and cell wall – Cell membranes surround all cells and separate the contents inside from outside. Only plant cells have a cell wall made of cellulose which provide strength and structure. Bacterial and fungal cells can also have a cell wall but made of other substances. When looking at a diagram of a cell with a cell wall, the cell wall will always be the outer line and the inner line will be the membrane.
Nucleus – This controls the cell. Do not say it is the ´brain of the cell´. This is a KS3 level description and should not be used in GCSE.
Mitochondria – The organelle carries out respiration. This a a chemical reaction to release energy from glucose. Respiration is not breathing which is the process on getting air in and out of your lungs.
Plants have chloroplasts and mitochondria. They can carry out photosynthesis and respiration. When it is sunny they are doing both.
Diffusion + Osmosis
Diffusion – does not stop once an equilibrium is reached. There is always a random movement of particles but there is no more net movement of particles because there is no concentration gradient.
Osmosis – is the diffusion of water molecules and there must be a semi permeable substance (membrane) involved. The membrane allows water to pass though as the holes are very small but larger molecules cannot.
Carbohydrates are sugars, starch or cellulose used for energy by cells. Polysaccharides are polymers of sugars (saccharides) like starch, glycogen and cellulose. But for GCSE level you can say that starch, glycogen and cellulose are examples of carbohydrates.
Plants make starch but then can break it down into glucose to be used for respiration inside their cells.
A camel´s hump is a store of lipid not water
If a lipid is a solid at room temperature then it is a fat. If it is a liquid at room temperature it is an oil. However, for GCSE level you can say fat or lipid.
Proteins are not made of DNA but amino acids. DNA codes for the synthesis of proteins.
Enzymes are a type of protein. Proteins involved with metabolic reaction are enzymes. Not all proteins are enzymes.
Enzymes have the active site., substrate do not.
Active site and substrate have a complementary shape not the same shape.
Enzymes do not die when heated, they denature which means the bonds holding their active site break and its shape changes and no longer fits the substrate. You cannot kill a protein.
When the temperature is reduced enzymes do not denature. They do not unravel and break apart as their bonds are not broken. They just have less kinetic energy and therefore rate of reaction. Only when you freeze enzymes and then unfreeze them may an enzyme become denatured.
Cells + Biological Molecules Worksheets pdf.
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Please download and print the PDF worksheet if you prefer to study using pen and paper. The worksheets have the same questions as the web-page version.
Cells are the basic unit of life, and they are found in all living organisms, from single-celled bacteria to complex multicellular organisms like humans and trees. They are like tiny factories that work together to keep the organism alive and functioning.
There are two main types of cells: prokaryotic and eukaryotic. Prokaryotic cells are found in bacteria and archaea and do not have a nucleus or other membrane-bound organelles. On the other hand, Eukaryotic cells are found in plants, animals, fungi, and protists. They have a true nucleus and other membrane-bound organelles carrying specific functions.
Plant cells have some additional structures that animal cells do not have. Chloroplasts are organelles responsible for photosynthesis, the process by which plants convert sunlight into energy. The cell wall is a rigid outer layer that provides support and protection for the cell. Vacuoles are large, fluid-filled organelles that store water, nutrients, and waste products.
Specialised cells have unique structures and functions that allow them to carry out specific tasks. For example, nerve cells have long extensions called axons, enabling them to transmit electrical signals over long distances. Red blood cells are specialised for carrying oxygen and have a unique shape that increases their surface area and allows them to absorb more oxygen. Root hair cells in plants have long, thin projections that increase their surface area and will enable them to absorb water and nutrients from the soil more efficiently.
In summary, cells are the building blocks of life, and they come in many different shapes and sizes. Each cell type has unique structures and functions that allow it to carry out specific tasks within the organism. Understanding the different parts of a cell and how they work together is essential for understanding how living things function and for success in GCSE Biology.
The first set of worksheets below has multiple-choice questions (MCQ). MCQs are one of the most powerful learning tools to assess student understanding and knowledge. These worksheets allow students to quickly and accurately answer questions while allowing them to practice their problem-solving skills. Using MCQs in cell worksheets saves students time and energy while ensuring they are better prepared for future exams.
Please download and print the PDF worksheet if you prefer to study using pen and paper. The worksheets have the same questions as the web page version.
The worksheets are simple “by design” to make them printer-friendly. We have tried to use colour and images to a minimum. Some questions require images; however, you can still print using black and white.
The cell worksheets below have open-ended questions, similar to the type of questions you get in your typical exam paper. Mastering exam preparation can be a challenge. But with the help of cell worksheets providing open-ended questions, students can prepare for their exams effectively and efficiently. These worksheets allow students to hone their skills, think critically, and apply what they have learned in a real-world setting. As a student, you should practice answering challenging questions to be better prepared and equipped to succeed in your exams.
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This GCSE Biology worksheet pack covers the key concepts associated with the enzyme topic. The resources are designed to be visually appealing to students and can be worked through independently. Each worksheet should take approximately 10-15 minutes to complete. The resource pack can be used to int...
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GCSE Biology Plants Worksheets. Download the pdf. worksheets below and read these explanations regarding common student misconceptions.The topics include: Photosynthesis. Plants can photosynthesise and respire at the same time. Some of the oxygen produced from photosynthesis is used by the plant cells for respiration.
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GCSE Cell & Biological Molecules Worksheets. Download the pdf. worksheets below and read these explanations regarding common student misconceptions.The topics include: Cells. Cell membrane and cell wall - Cell membranes surround all cells and separate the contents inside from outside. Only plant cells have a cell wall made of cellulose which ...
April 18, 2022 ∙ 3 min read. Cells are the basic unit of life, and they are found in all living organisms, from single-celled bacteria to complex multicellular organisms like humans and trees. They are like tiny factories that work together to keep the organism alive and functioning. There are two main types of cells: prokaryotic and eukaryotic.
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