← KCOGGS Test
5 Written Questions
5 Matching Questions
- Why are plants healthier in hypotonic environments?
- What is passsive transport?
- What is feedback inhibition?
- What is a hypertonic solution?
- Are inhibitors always harmful?
- a A solution whose pH is higher than that of the cells, cell loses water, shrivels
- b Because plants have cell walls which make it harder for the solution to take effect, need more of it
- c No, enzyme inhibition often used for regulation cell metabolism
- d The diffusion of molecules across the biological membrane, requires no work
- e Most chemical reactions are organized into a series of steps, each catalyzed by an enzyme, to form certain product. If product is being over-made, then the product will act as an inhibitor to one of the enzymes in its pathway, called feedback inhibition (?)
5 Multiple Choice Questions
- A chemical reaction that releases energy, reactants covalent bonds contain more energy than products
- PM allows some substances to cross more easily than others
- When molecules are too big to pass through membrane, so they go through protein to be able to get to the other side
- Doesn't bind to active sight, binds to corner of enzyme, changes shape of active sight so substrate cannot bind
- The diffusion of water across a selectively permeable membrane
5 True/False Questions
What is an isotonic solution? → A solution whose pH is equal to that of the cell, the cell gains water as quickly as it loses it, stays the same
How does active transport work? → 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 a hypotonic solution? → A solution whose pH is lower than that of the cells, cell gains water, pops
How are enzymes like assembly lines? → fluid mosaic of phospholipids and proteins
How is a phospholipid structured → With one phosphate group and two fatty acids, has hydrophilic head and hydrophobic tails