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AQA GCSE Biology Topic 3 Define pathogen ️Disease causing microorganism Define bacteria ️Single-celled organism that rapidly reproduces in human body releasing toxins and damaging cells Define virus ️Live and reproduce in cells bursting and damaging cells Define protist ️Eukaryote that live in or on another organism Define Fungi ️Single cells or hyphae that grow and penetrate human skin or surface of plants An example of a Pathogen that spreads via water ️Cholera Exam...

AQA GCSE Biology Paper 1 - Revision Questions How is the real size of a magnified image calculated? ️Real size = Image size ÷ Total magnification. What is a eukaryotic cell? ️A cell with DNA inside a membrane bound nucleus. Prokaryotic cells do not have a nucleus. Name two differences between a plant cell and a bacterial cell? ️Plant cells have a nucleus / plant cells have mitochondria / plant cells have chloroplasts / plant cells have a cellulose cell wall whereas bacteria d...

AQA GCSE Biology Paper 1 Graded A+ Magnification equation ️Magnification= image size/actual object size Light microscope- how many um in 1 mm ️1000 um light microscope- how many nm in 1 um ️1000 nm Light microscope- why can we see the nucleus and cell wall but not the mitochondria ️Too small and not stained light microscope- how can we see smaller parts of cells ️An electron microscope has much more resolution and magnification What is osmosis? ️The movement of water ...

Foundation AQA Biology Paper 1 Already Rated A What are the structures of an animal cell? ️Nucleus, cytoplasm, cell membrane, mitochondria and ribosomes. What are the structures of a plant cell? ️All structures from animal cells and cell wall, permanent vacuole and chloroplasts. What does the nucleus do? ️Stores DNA and directs all cellular activities. What is the cytoplasm do? ️Where most chemical reactions take place. What does the cell membrane do? ️Holds the cell toge...

GCSE Biology – Organisation Complete Solutions Cells ️The basic building blocks of living things Tissues ️A group of cells with similar structure and function Organs ️Groups of tissues performing particular functions Lock and key ️Theory as to how enzymes work Digestion breaks down ️Large insoluble molecules into smaller soluble ones Active site ️The part of an enzyme the substrate binds to Denatured ️When an active site is altered by temperature or pH Amylase (ca...

Combined Science Higher Biology GCSE 9-1 AQA Flashcards Graded A+ What is a cell? ️The basic unit of all living things What is a eukaryotic cell? ️A cell with a nucleus What is a prokaryotic cell? ️A cell without a nucleus Features of a eukaryotic cell? ️- Have a membrane bound nucleus - Large (10 - 100 µm) - Multi cellular - Complex Features of a prokaryotic cell? ️- Lacks a nucleus - Small (0.1 - 5 µm) - Unicellular - Simple Example of prokaryotic cell... ️Bacteria ...

AQA GCSE Biology B1 What are cells? The building blocks of organisms Define eukaryotic cell Cells that have a true nucleus Define prokaryotic cell Cells that do not have a true nucleus What is in an animal cell? Nucleus, cytoplasm, cell membrane, mitochondria, ribosomes What is in a plant cell? Same as animal plus: vacuole, chloroplasts, chlorophyll, cell wall What is in a yeast cell? Same as animal plus: temporary vacuole, cell wall What is in a bacterial cell? Cytoplasm, cell me...

GCSE Biology Paper 1 All Answers Correct What are the two main types of cell Prokaryotic Eukaryotic Which cells are prokaryotic Bacteria What cells are eukaryotic Plant animal and fungal What are the differences between the two types of cells Prokaryotic cells are smaller in size Prokaryotic doesn't have a nucleus The genetic material is in a single dna loop or small rings called plasmid What are plasmids Loops of dna that can be transferred from one cell to another Where ar...

Biology AQA GCSE B6 Guaranteed Success Vaccine ️a small dosage of dead or inactive pathogens injected into the body the job of vaccinations ️to produce the correct antibodies for a specific disease so that next time the specific pathogen enters the body your whole blood cells already know how to defeat them white blood cells ️create specific antibodies to fight disease memory T cells ️remember the shape and type of an antigen and can quickly produce more antibodies to defeat ...

AQA GCSE Triple Science – Biology Verified Answers What are eukaryotic cells? ️Cells that are more complex and have a nucleus (animal and plant cells) What are prokaryotic cells? ️Cells that are smaller and simpler, and don't have a nucleus but still have genetic information (bacteria) What are eukaryotes? ️Organisms made of eukaryotic cells What is a prokaryote? ️A prokaryotic cell (it's a single celled organism) What is cytoplasm? ️A liquid gel in which most of the ch...

AQA GCSE Biology Paper 2 Graded A+ What is homeostasis? ️The maintenance of a constant internal environment. What is a stimulus? ️A change in your environment than requires a response. e.g Light, sound, touch, pressure, pain, chemical or temperature. What do the receptors do? ️Detect the stimulus or change in environment. What happens after the receptors? ️Receptors send messages to the CNS via the sensory neurone. What makes up the central nervous system? ️The brain or spi...

AQA GCSE Biology (9-1) - Paper 1 Verified Solutions What are the two types of microscopes? ️Light Microscope Electron Microscope What is the magnifying power of a light microscope? ️x 2,000 What is the magnifying power of an electron microscope? ️x 2,000,000 What is the resolving power? ️The ability to distinguish between two separate points What is the resolving power of light microscopes? ️200 nm What is the resolving power of electron microscopes? ️0.2 nm What are ...

AQA GCSE Biology - Paper 1 Rated A+ What does a nucleus do? ️It contains genetic material and controls the activities of the cell What does cytoplasm do? ️It's a gel-like substance where most of the chemical reactions happen. It contains enzymes that control these chemical reactions What does a cell membrane do? ️It holds the cell together and controls what goes in and out What do mitochondria do? ️These are where most of the reactions for aerobic respiration occur. Respirat...

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