5 Written questions
5 Matching questions
- What type of reaction is this? burning of wood releases glucose molecules energy as heat and light
- What is osmosis?
- What is a competitive inhibitor?
- What is the problem with the concept of energy of activation?
- Are inhibitors always harmful?
- a Exergonic reaction
- b It takes a very long time for all the products to gain enough energy to make it over the energy barrier
- c A chemical that resembles the enzymes normal substrate, binds to active sight, irreversible
- d The diffusion of water across a selectively permeable membrane
- e No, enzyme inhibition often used for regulation cell metabolism
5 Multiple choice questions
- signl transduction
- Forms a boundary between the living cell and its surroundings and controls the traffic of molecules into and out of the cell, takes up substances the cell needs and disposes of the cells wastes
- The way of an plant/animal to prevent excessive uptake or excessive loss of water
- The tendency of a cell in a given solution to lose or gain water
- A solution whose pH is higher than that of the cells, cell loses water, shrivels
5 True/False questions
What is cellular respiration? → Every working cell in every organism caries out thousands of exer/endergonic reactions
What is a cellular metabolism? → The way cells release energy, chemical process that uses oxygen to convert the chemical energy stored in fuel molecules to form chemical energy that the cell can use to perform work
What is an endergonic reaction? → A reaction that requires energy, its products have more energy than its reactants, energy is absorbed through surroundings as reaction occurs, energy stored in covalent bonds of product molecules
Catalyctic cycle of an enzyme: → 1. Substrate enters active sight, is fitted by induced fit 2. Broken up into products by hydrolysis 3. Released from enxyme
What type of reaction is this? photosynthesis starts with co2 and h2o molecules, using energy absorbed from sunlight, produces energy-rich sugar molecules → Endergonic reaction