Exam 5: The Dynamic Cell

Both starch and cellulose are made by stringing together many glucose molecules, but starch is easily digested by humans while cellulose is indigestible. The starch polysaccharide has every bond occurring below the sugar rings while the bonds in cellulose alternate between one bond above the ring and the next below the ring. How can you explain the human's inability to digest cellulose?

Which is an example of potential rather than kinetic energy?

Energy of activation ________.

Which of the following terms best describes entropy?

Molecules move from greater to lesser concentration through a transport protein in ________.

When a potted house plant is wilting, the addition of water quickly changes the look of the plant. This can be accounted for by which of the following statements:

When a car burns gasoline, much of the energy is in the form of heat as the car is driven. Which of the following best describes this in relation to the 1^st law of thermodynamics?

Pickles are often preserved in a 20-30% salt solution called brine. How does this method prevent contamination by microorganisms?

Which of the following is best associated with a coupled reaction?

When neurons release their neurotransmitters, they release them by secretory vesicles fusing with the plasma membrane thereby emptying their contents into an area that can stimulate some response. What type of cellular transport is occurring as the vesicle forms and then surfaces on the cell's plasma membrane?

Enzymes are able to speed up the rate of a reaction by

Probable factors that affect the passage of materials across cell membranes include all of the following except ____________.

The figure below demonstrates which key concept regarding cell activities?

Which one of the following molecules is able to move across the cell membrane by simple diffusion?

The figure below reflects how these two cells would respond in a _______ environment.

When a cell is in a solution where the concentration of solute is the same in the cell as in the solution, the solution is called ________.

What is the biological risk of using salt on icy roads in parts of the country that have a cold winter season?

In the set-up shown in the figure below, which process allows the water to move across the membrane?

The second law of thermodynamics states that all energy transformations result in more disordered energy. How can photosynthesis take more disordered carbon dioxide and water and convert them into glucose which is more ordered?

Which of the following is not a type of potential energy?