5 Written questions
5 Matching questions
- How does facilitated diffusion work?
- What is osmosis?
- What is osmoregulation
- What is an endergonic reaction?
- What is the problem with the concept of energy of activation?
- a The diffusion of water across a selectively permeable membrane
- b The way of an plant/animal to prevent excessive uptake or excessive loss of water
- c It takes a very long time for all the products to gain enough energy to make it over the energy barrier
- d 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
- e The protein receives the molecule and changes shape to launch it out to other side
5 Multiple choice questions
- 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
- PM allows some substances to cross more easily than others
- Increasing the number of substrate molecules so theres less of a chance that the inhibitor will get to the active sight first
- A chemical that resembles the enzymes normal substrate, binds to active sight, irreversible
5 True/False questions
What is passsive transport? → The diffusion of molecules across the biological membrane, requires no work
What is the solution? and why? → The sight where the enzyme and substrate react together, specific because the active sight only fits one substrate
How does osmosis work? → The diffusion of water across a selectively permeable membrane
How does a receptor protein relay it's information? → A protein that's part of the fluid mosaic that fit's the shape of a message just like an enzyme fit's the shape of a substrate
Why is the structure of a phospholipid helpful and clever? → The hydrophilic heads face the outside of the membrane while the tails make up the inside, and only the nonpolar, hydrophobic molecules that are soluble in lipids can easily pass through the membrane