5 Written questions
5 Matching questions
- What are membranes made up of?
- What is the energy of activation?
- What is an example of an enzyme inhibitor?
- How are enzymes like assembly lines?
- What is the active sight?
- a A product from one catalyctic cycle becomes the substrate for the next, and so on down a chain of enzymes
- b The amount of energy the reactants must absorb to become active and start a chemical reaction/get over the energy barrier
- c Lipids, mostly phospholipids
- d Many poisons, pesticides, and drugs
- e The sight where the enzyme and substrate react together, specific because the active sight only fits one substrate
5 Multiple choice questions
- A specific reactant that an enzyme reacts on, fits into the active sight
- Every working cell in every organism caries out thousands of exer/endergonic reactions
- Doesn't bind to active sight, binds to corner of enzyme, changes shape of active sight so substrate cannot bind
- PM allows some substances to cross more easily than others
- Exergonic reaction
5 True/False questions
cf → The tendency of a cell in a given solution to lose or gain water
What is energy coupling? → fluid mosaic of phospholipids and proteins
How does osmosis work? → The diffusion of water across a selectively permeable membrane
What is passsive transport? → Requires that a cell expends energy to move molecules across membrane against concentration gradient, low to high concentration, ATP supplies energy for most active transport
What is active transport? → The diffusion of molecules across the biological membrane, requires no work