In the lock-and-key model of enzyme action, the enzyme active site is thought of as Group of answer choices a rigid, nonflexible shape that fits the substrate exactly a lock that bars a noncompetitive inhibitor from reacting a hydrophilic area on the enzyme surface a key-like shape that fits into a pocket of the substrate surface an area of the enzyme that can adjust to fit the substrate shape

In which of the following ways is the function of the surface of a microsphere similar to the function of an actual cell membrane? a.both make it possible for the conditions in the interior to be different from the conditions outside. b.both provide a barrier that keeps water from flowing across it so the interior remains dry. c.both separate the rna that forms in the interior from any rna that might form in the environment. d.both can actively move molecules into the interior or out into the surrounding environment.

Facilitates growth and change in neurons and the migration of neurons to different sites in the brain

Which group of algae is characterized by unicellular organisms and includes some members that would be better classified as zooflagellates? euglenophytes red algae sporozoans green algae