4. A bacterium is suddenly expelled from a warm human intestine into the cold world outside (hey, it's been a cold December!). Which of the following adjustments might the bacterium make to maintain the same level of membrane fluidity? 1) Produce lipids with hydrocarbon tails that are longer and have fewer double bonds J) Produce lipids with hydrocarbon tails that are shorter and have more double bonds K) Decrease the amount of cholesterol in the membrane L) Decrease the amount of glycolipids in the membrane Answer: Explanation:

Which solution is most hypertonic? And which solution is most hypotonic?

Describe the cross - section side view of a Gram - negative cell . Clearly state where the following would be located or write the letters in order of appearance from the outside to the inside . If any of these structures are not present , make sure to leave them out . A ) peptidoglycan ; ( B ) periplasm ; ( C ) porin ; ( D ) LPS ; ( E ) teichoic acids ; ( F ) plasma membrane : ( G ) outer membrane : ( H ) nucleoid

Arial 1 T T T Circle/highlight F T 1. T F LL F LL F FL T F LL - 1 11 + 11 1. 1 BI U A, 2. 3 CD 1 1. 4 Z | EEEE 13 5 either T or F for each row An isotonic solution is when there is more of the solute on the outside of the cell than in the inside of the cell Passive transport is when a solute moves with it's gradient to try to achieve equilibrium Secondary active transport is when a solute moves against its gradient and that movement is powered by ATP You can couple passive transport with active transport in order to move a solute against its gradient Solar energy was likely the source of energy for the origin of life Catabolism is when smaller units come together to make a larger molecule I

31)

A cell is moved from its normal environment in a freshwater river and is suddenly placed into the ocean. What would be the effect of this change in environment on the cell? O 1) It would shrivel because it would lose water. O 2) It would shrivel because it is responding to a hypotonic environment. O 3) It would swell because it is experiencing a hypertonic environment. O 4) It would swell because it would gain water. O 5) Nothing would happen to the cell.

26. Plant cells placed in an isotonic solution would     a)  become less turgid   b)  become turgid   c)  undergo plasmolysis   d)  remain the same   e)  swell

Which of the following is not true about a gram-positive cell wall? It has plasma membrane inside cell wall It contains lipopolysaccharides (LPS) It maintains the shape of the cell It contains teichoic acids

Please explain the correct answer

just do d and e