edexcel biology foundation paper 1

Cards (17)

  • the pancreas produces digestive enzymes
  • enzymes are proteins that speed up chemical reactions by lowering the activation energy required to start them off
  • the pancreas produces digestive enzymes
  • The Calvin cycle uses the hydrogen ions and electrons produced by the light-dependent reactions to convert carbon dioxide and water into glucose.
  • digestion is the process where food molecules are broken down into smaller units so they can be absorbed across cell membranes
  • Chromoplasts store excess light energy as starch in plant leaves and roots.
  • mechanical digestion involves physical breakdown of large particles using teeth, tongue, saliva and stomach muscles
  • enzymes are proteins that speed up chemical reactions by lowering the activation energy required to start them off
  • mechanical digestion involves physical breakdown of large particles using teeth, tongue and stomach muscles
  • chemical digestion uses enzymes produced by glands in the mouth, stomach and small intestine to break down complex carbohydrates, fats and proteins into simpler sugars, fatty acids and amino acids respectively
  • digestion is the process where food molecules are broken down into smaller units so they can be absorbed across cell membranes
  • The Calvin cycle is also known as the dark reaction because it occurs without sunlight.
  • in plants, photosynthesis takes place in chloroplasts which contain chlorophyll (a green pigment)
  • In the Calvin cycle, ATP and NADPH molecules from the light-dependent reactions are used to reduce CO2 to form G3P (glyceraldehyde 3 phosphate).
  • In plants, chlorophyll absorbs most strongly at wavelengths around 430 nm (blue) and 662 nm (red).
  • chemical digestion breaks down complex organic compounds into simpler ones with the aid of enzymes
  • chemical digestion uses enzymes produced by glands in the mouth, stomach and small intestine to break down complex carbohydrates, fats and proteins into simple sugars, fatty acids and amino acids respectively