Enzymes catalyze chemical reactions in cells by 

Cholesterol in a plasma membrane 

Facilitated diffusion may be required in a cell when 

The blood of marine fish has a salinity of approximately 0.9% (0.9% salt solution), while their external environment has, on average, 3.5% salinity. This means that marine fish live in a _______________ environment and must overcome the tendency to _____________ the environment. 

Activation energy is required for 

Which occurs during metaphase of mitosis?

Diffusion is defined as the net movement of molecules from areas of  _____________ concentration and (does / does not) require energy. 

The Diary of Anne Frank is a _____ view of events during World War II, from the point of view of a young Jewish girl in hiding.

Every Body Paragraph must contain ONE of these sentences.

What is a Rubric?