CH 5

Which of the following terms best describes entropy?

disorder

Simple diffusion across a plasma membrane is called passive transport because it

does no require energy from the cell

Metabolic pathways are known for all of the following EXCEPT

enzymes to help raise the energy of activation

In what function do the embedded membrane proteins at "c" serve?

facilitated and active transport

Which of the following is not a mechanism used to move materials in and out of the cell?

feedback inhibition

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

osmosis

The concentration of calcium in a cell is 3% The concentration of calcium in the surrounding fluid is 1% How could the cell obtain more calcium?

pinocytosis

The opposite of a turgid plant cell is a

plasmolyzed plant cell

What prevents a plan cell from bursting in a hypotonic solution

cell wall

Considering the ATP cycle, which of the following would have the most potential energy to perform work for cell activities?

ATP

Identify which of the following statements is not true

ATP is comprised of a sugar, base and two phosphates groups

Which of the areas shown in the figure below indicates the presence of an enzyme in the movement of reactant over the product

C

Which of the following is and example of osmosis

Cells of our kidneys reabsorb water to prevent it from al leaving through our urine

probable factors that affect the passage of materials across cell membranes include all of the following EXCEPT

color

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

Energy can be changed from one form to another

Molecule move form greater to lesser concentration through a transport protein in

Facilitated diffusion

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 the bond above the ring and the next below the ring. How can you explain the human's inability to digest cellulose?

The enzyme that breaks down starch can only fit the specific bond configuration of bonds below the ring.

In the set-up shown in the figure below, which of the following statements would describe what would be ovserved after12 hours of time

The level of the solution in the tube would rise because there are now more dissolved solute present in the beaker than in the tube

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

The metabolic reaction requires energy from ATP

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

The water creates a hypertonic environment causing the cells to gain water

The second law of thermodynamics states that all energy transformations result in more disordered energy. How do living organisms, which depend on chemical potential converting to kinetic energy to fuel their function, continue to live?

They must constantly take in chemical potential energy for fuel and excrete waste

Enzymes, coenzymes, and cofactors provide a mechanism for a cell to regulate the metabolism of a large amount of cell products using small quantities of chemicals

True

Less energy is needed to bring about a reaction when an enzyme is present.

True

The part of the enzyme into which the substrate fits is called the

active site

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?

solar energy is being added to the reaction to create glucose

If blood cells are placed in a hypertonic solution

the cell will shrink due to water loss by the cell

Which of the following is not a type of potential energy

the energy of a ball rolling down a hill