Study

National 5 Biology 1.4 Proteins

  •   0%
  •  0     0     0

      Back   Restart
  • What is the name given to the conditions that an enzyme is most active at?
    Specific
    Optimum
    Degradation
    Denatured
  • Enzymes are composed of …………….
    Carbohydrate
    Fat
    Starch
    Protein
  • What are the 5 functions of proteins?
    structural, enzymes, hormones, antibodies and receptors
    diffusion, enzymes, hormones, antibodies and receptors
    structural, enzymes, hormones, antibodies and osmosis
    osmosis, genes, hormones, antibodies and receptors
  • Name the type of breakdown reactions that enzymes are involved in and describe these reactions.
    Degradation. A large molecule is broken down into smaller molecules.
    Synthesis. Small molecules are built up into large molecules.
  • Building up smaller molecules into a larger molecule is an example of a …………………...
    Synthesis Reaction
    Degradation Reaction
  • What is the optimum pH of the enzyme?
    8
    6
    2
    10
  • What name is given to the molecules at the end of an enzyme reaction?
    Products
    Catalysts
    Substrates
    Proteins
  • What name is given to the enzyme that breaks down protein into peptides?
    Pepsin
    Catalase
    Lipase
    Amylase
  • What are the products produced when fats are broken down by Lipase?
    Peptides
    Maltose
    Fatty acids and glycerol
    Oxygen and water
  • What happens to an enzyme once its temperature or pH goes beyond the optimum level?
    It denatures and enzyme activity increases
    It denatures and enzyme activity decreases
  • What does the enzyme amylase break down starch into?
    Glycerol
    Glucose
    Peptides
    Maltose
  • Proteins are made from chains of …………….
    Ribosomes
    mRNA
    DNA
    Amino Acids
  • What type of enzyme reaction is shown in the diagram?
    Synthesis
    Degradation
  • Which enzyme is used to build up Glucose-1-Phosphate into Starch?
    Phosphorylase
    Amylase
    Pepsin
    Catalase
  • What happens to the active site when enzymes are denatured?
    Substrate binds
    Changes shape
  • What name is given to the site where the enzyme and substrate bind?
    Active Site
    Product Site
    Enzyme Site
    Catalyst Site
  • Which enzyme is specific to Hydrogen Peroxide?
    Amylase
    Phosphorylase
    Catalase
    Pepsin
  • Enzymes are ………...
    biological catalysts
    Non-biological catalysts
  • What forms to facilitate an enzyme reaction?
    An enzyme-substrate complex
    A protein
    A biological catalyst
    An active site
  • What are the 2 conditions that affect enzymes?
    temperature and hormones
    receptors and pH
    temperature and pH
    receptors and hormones
  • Which of these is a correct description of enzymes?
    slow down cellular reactions, unchanged and made by all living cells
    speed up cellular reactions, changed and made by all living cells
    speed up cellular reactions, changed and made by all dead cells
    speed up cellular reactions, unchanged and made by all living cells
  • What are the two types of enzyme reaction?
    degradation and synthesis
    degradation and osmosis
    degradation and diffusion
    diffusion and osmosis
  • Name the type of build-up reactions that enzymes are involved in and describe these reactions.
    Degradation. A large molecule is broken down into smaller molecules.
    Synthesis. Small molecules are built up into large molecules.
  • What type of reaction is shown in the diagram?
    Degradation
    Synthesis
  • What does the variety of protein shapes and functions depend on?
    the sequence of glucose molecules
    the sequence of fatty acids
    the sequence of amino acids
    the sequence of bases
  • What feature of an enzyme is shown in the diagram?
    The shape of the active site is different to its specific product
    The shape of the active site is complementary to its specific product
    The shape of the active site is different to its specific substrate
    The shape of the active site is complementary to its specific substrate
  • What is special about the active site?
    The active site is the same as its specific substrate
    The active site is complementary to its specific substrate
  • Enzymes bind to a ...………...….
    Non-Specific Substrate
    Specific Substrate
    Specific Product
    Non-Specific Product
  • Breaking down a large molecule into smaller molecules is an example of a …………….
    Synthesis Reaction
    Degradation Reaction
    • Your experience on this site will be improved by allowing cookies.