CARDS THAT WON’T DELETE

• Resolution


  The shortest distance between two points on an object that can still be distinguished as two separate entities
• Resolution of light microscope


  Limited to 0.2 micrometers, any details less than 0.2 micrometers apart will appear blurry
• Resolution of electron microscope


  Maximum resolution of 0.1 nanometers, 2000 times better than light microscopes
• Converting 6 millimeters


  • 6 millimeters = 0.006 meters = 0.000006 kilometers
  • 6 millimeters = 6,000 micrometers = 6,000,000 nanometers
• To convert between non-adjacent units, convert in steps
• Centimeters


  10 millimeters, 100 centimeters in a meter
• Converting 30 centimeters


  • 30 cm = 300 mm = 300,000 micrometers = 300,000,000 nanometers
• Enzymes are a type of catalyst made by living organisms
• There is a learning platform where you can watch all the videos, practice what you've learned with questions, and keep track of your progress for both the sciences and maths
• In today's video we're looking at the different biological molecules or nutrients that you need for a healthy balanced diet
• We also have a learning platform where you can watch videos, practice with questions, and track progress for sciences and maths
• Edexcel Biuret test for proteins

  1. Take food sample

  2. Add potassium hydroxide

  3. Add copper sulfate

  4. Observe colour change
• Sudan 3 test for lipids

  1. Take 5cm3 of food sample

  2. Add 3 drops Sudan 3 stain

  3. Observe red layer
• Amadeus has a learning platform where you can watch videos, practice with questions, and track progress for sciences and maths
• The learning platform is completely free
• The videos for this subject are arranged in a playlist
• Active transport


  1. Movement of molecules against concentration gradient

  2. Requires energy from cellular respiration
• Amadeus has a learning platform with videos, practice questions, and progress tracking for science and maths subjects
• There is a learning platform at www.anki.com with videos, practice questions and progress tracking for sciences and maths
• If you're shown images that make you sad while in an MRI machine, certain parts of your brain will appear brighter because they're associated with feeling sadness
• If you listen to music while in an MRI machine, you'd see a different pattern of activity in the brain
• Genetic diagram example


  • Homozygous normal mouse x Homozygous muscular mouse
• Punnett square example


  • Heterozygous normal mice x Heterozygous normal mice
• Unaffected individuals


  • Jenny
• Carrier individuals


  • Paul, Anna, Lucy
• Affected individuals


  • Sam's wife
• Everything is made up from tiny little particles that can't be broken down any further and that they're separated from each other by empty space
• Atomic theory


  The idea that everything is made up from tiny little particles that can't be broken down any further and that they're separated from each other by empty space