5 Written questions
5 Matching questions
- How does active transport work?
- What is an isotonic solution?
- What is cellular respiration?
- What is active transport?
- a 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
- b The tendency of a cell in a given solution to lose or gain water
- c 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
- d The protein receives the solute, ATP phosphorylates the protein, the protein changes shape which causes the solute to be launched on the other side of the membrane where it is more concentrated
- e A solution whose pH is equal to that of the cell, the cell gains water as quickly as it loses it, stays the same
5 Multiple choice questions
- The bonds that keep the three phosphates together are easily broken by hydrolysis, when the bond to the third group breaks the phosphate group leaves ATP which becomes ADP, and energy is released (?)
- The energy barrier
- When theres more water on one side of the membrane than the other, then the water molecules on the side with more water bind to the solute molecules in order to equal out the amount of water on both sides, because now there are less free water molecules on the side where there was once more. This creates an equilibrium
- A solution whose pH is higher than that of the cells, cell loses water, shrivels
- With one phosphate group and two fatty acids, has hydrophilic head and hydrophobic tails
5 True/False questions
What is the membrane? → fluid mosaic of phospholipids and proteins
What type of reaction is this? photosynthesis starts with co2 and h2o molecules, using energy absorbed from sunlight, produces energy-rich sugar molecules → Exergonic reaction
What is induced fit? → The tendency for particles of any kind to spread out evenly in an available space, moving from where they are more concentrated to regions where they are less concentrated. Requires no work, random, kinetic energy
What is this message-transfer process called? → The diffusion of molecules across the biological membrane, requires no work
Why are plants healthier in hypotonic environments? → Because plants have cell walls which make it harder for the solution to take effect, need more of it