chapter 3 Flashcards
two examples of prokaryotic cells are
bacteria & archea
nucleoid and plasmid is found in
prokaryotic cells
a plasma membrane is
a thin layer that regulates the passage of substances between the cell and its surroundings
eukaryotic cells contain
organelles—-(membrane-enclosed structured that preform specific functions)
plasma membrane and nucleus are found in
eukaryotic cells
cytoplasm is what?
a liquid region between the plasma membrane and the nucleus
what does chloroplast do?
contains structures that convert light energy to food energy during the process of photosynthesis
only animal cells have
a lysosome
only plant cells have
chloroplast, cell walls, and central vacuoles
the plasma membrane are composed of
phospholipids and proteins
phospholipids are organized into two layers called
phospholipid bilayer
the head of a phospholipid is
hydrophilic (loves water)
the tail of a phospholipid is
hydrophobic (hates water)
passive transport is what?
when a substance moves across a membrane from a area of HIGH concentration to LOW concentration, requires no energy!!!!
what is diffusion?
movement of molecules from an area of HIGH to LOW
