Chapter 5: The Working Cell

Which of the following is the best example of a substance that contains chemical energy?

Which is the best definition of energy?

Which one of the following statements about energy is correct?

Calories are units of _____.

The molecule most directly involved in energy transfer within cells is _____.

Which of the following statements concerning enzymes is true and correct?

An enzyme is a protein that __________.

The movement of atoms, ions, or molecules from a region of higher concentration to regions of lower concentration is called _____.

The diffusion of water across a selectively permeable membrane is called _____.

Which of the following statements is true about passive transport?

Which one of the following is an example of osmosis?

The transport of molecules of a particular solute from inside an animal cell across the cell membrane to the extracellular fluid always requires energy when __________.

When in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. This occurs regardless of whether the concentration of this molecule is higher inside or outside the cell. Using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane?

The concentration of calcium in a cell is 0.3%. The concentration of calcium in the surrounding fluid is 0.1%. How could the cell obtain more calcium?

A nursing infant is able to obtain disease-fighting antibodies, which are large protein molecules, from its mother's milk. These molecules probably enter the cells lining the baby's digestive tract via _____.

A primary function of the cell membrane is to __________.