Question

1. in which structure would you expect to find a cell wall? a cell from an oak tree a human skin cell a liver cell from a mouse a blood cell from a cat 29. prokaryotic and eukaryotic cells generally have which of the following features in common? smooth and rough endoplasmic reticulum a nucleus membrane bound organelles free floating ribosomes 30. lipids are different from other macromolecules because they: are hydrophobic (do no mix with water) form large protein molecules contain genetic information dissolve easily in water

Explanation:

• For question 28: Plant cells, like those from an oak - tree, have cell walls. Animal cells (human skin cell, mouse liver cell, cat blood cell) do not have cell walls.
• For question 29: Prokaryotic cells lack a nucleus and membrane - bound organelles, and rough and smooth endoplasmic reticulum are membrane - bound organelles. Both prokaryotic and eukaryotic cells have free - floating ribosomes.
• For question 30: Lipids are hydrophobic, which means they do not mix with water. Proteins are different macromolecules, nucleic acids contain genetic information, and lipids are not water - soluble.

Answer:

1. A. A cell from an oak tree
2. D. free floating ribosomes
3. A. are hydrophobic (do no mix with water)