Biology GCSE paper 1
- Created by: mary
- Created on: 05-04-18 11:35
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- Biology paper 1
- Cells
- Eucaryotes
- cell membrane
- Controls what goes in and out
- Cell wall
- Structure
- Vacuole
- storage bubble
- Cytoplasm
- Reactions take place
- Ribosomes
- Protein synthesis
- Chloroplasts
- photosynthesis
- Mitocondria
- energy produced
- Nucleus
- cell membrane
- Prokaryotes
- Cell membrame
- Controls what goes in and out
- Cytoplasm
- Reactions take place
- chromosome
- DNA not in nuclues
- Flagella
- motion
- Ribosomes
- Protei synthesis
- Cells, tissues and organs
- organ system
- Groups of organs working together
- tissue
- One type of cells carrying out a function together
- organ
- Lots of types of cells carrying out a function
- organ system
- Cell membrame
- There is many types of cell
- Differentiated and specialised
- Nerve
- Long travel long distance
- Sperm
- Muscle
- Can stretch and contract
- Leaf
- Tall for structure
- Skin
- Gut
- Has villi for surface area
- Start the same but genes get turned off so it grows into a different cell
- stem cells
- Can turn into any other type of cell
- Grow new cells e.g bones, nerve
- grow new parts of organs
- Can turn into any other type of cell
- Nerve
- Differentiated and specialised
- Eucaryotes
- Microsopes
- Microscopes have progressed
- Light and electron
- Microscopes have progressed
- DNA
- Long strand of double helix structure
- Further twisted into a chromosome in the nucleus
- Mitosis
- One parent cell to 2 identical daughter cells
- 1. Chromosomes pair up and line up down middle of cell
- 2. They are pulled apart to each side of the cell
- 3. new nuclei and membrane forms, now is 2 daughter cells
- One parent cell to 2 identical daughter cells
- Long strand of double helix structure
- Movement of particles
- Diffusion
- High to low concentration (down gradient)
- seen in cells eg. alveoil in lungs, gas diffuses from bloos (capillary) to lungs (alveoli)
- Villi in intestines
- Has thin cell membrane and large surface area
- seen in cells eg. alveoil in lungs, gas diffuses from bloos (capillary) to lungs (alveoli)
- Nutrients diffuse into blood
- Has thin cell membrane and large surface area
- High to low concentration (down gradient)
- Osmosis
- Movement of water through a partially permeable membrane from area of high water concentration to an area of low water concentration
- Solute cannot move through membrane so water does
- Movement of water through a partially permeable membrane from area of high water concentration to an area of low water concentration
- active transport
- across a membrane low to high concentraion
- uses energy
- across a membrane low to high concentraion
- Diffusion
- Enzymes
- Lipase
- fats into glcerol and fatty acids
- Made in pancreas and small intestine
- Works in samall intestine
- protease
- Breaks down proteins into amino acids
- made in stomach, pancreas and small intestine
- Works in stomach and small intestine
- Amylase
- works in mouth, small intestine
- breaks down starch into sugars
- made in pancreas, salivary galands and small intestine
- work in lock and key mechanism
- specifically shaped active site and only one substrate fits inside
- are not affected by the reaction
- Lipase
- Cells
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