Diffusion, osmosis and active transport + biological molecules Flashcards
What is diffusion?
Diffusion is the spread of particles from a high concentration to a low concentration
What is osmosis?
Osmosis is movement of water from a region of high water concentration to a low water concentration through a semi permeable membrane.
What is active transport?
The movement of particles from a low concentration to a higher concentration USING ENERGY
How can cells adapt to make diffusion easier?
They can have a larger surface area
Describe an experiment you can do for diffusion
Get a glass of water and put some food colouring in it and watch it diffuse throughout the glass
Which elements occur in water?
Hydrogen and oxygen
Which elements occur in proteins?
Hydrogen, oxygen, nitrogen and carbon
which elements occur in fats?
Carbon, oxygen and hydrogen
Which elements occur in carbohydrates?
Carbon, hydrogen and oxygen
Which molecule is a single sugar molecule?
Glucose
Which molecule is a double sugar molecule?
Sucrose
Which molecule is a multiple sugar molecule?
Starch
Which two molecules are soluble in water
Glucose and starch
Which molecule is insoluble in water
Starch
Which molecule is the main substance from which living things obtain energy
Glucose
Remember photosynthesis
