Bio Ch.5
Considering the ATP cycle, which of the following would have the most potential energy to perform work for cell activities?
ATP
Pickles are often preserved in a 20-30% salt solution called brine. How does this method prevent contamination by microorganisms?
Bacteria can't survive in a hypertonic solution because they lose water.
Which of the following statements describes the correct flow of energy conversions through living systems?
Chloroplasts convert solar energy to the chemical energy of nutrient molecules.
When a car burns gasoline, much of the energy is released in the form of heat. Which of the following best describes this process in relation to the first law of thermodynamics?
Energy can be changed from one form to another.
Which of the following is not an example of osmosis?
Sugar in coffee dissolves.
In the setup shown in the figure below, which of the following statements would describe what would be observed after 12 hours of time have elapsed?
The level of the solution in the tube would rise because there are now more dissolved solutes in the tube than the beaker.
What is the biological risk of using salt on icy roads in parts of the country that have a cold winter season?
The salt has the risk of leeching into the ground and creating a hypertonic environment for plant cells.
ATP releases energy when
a phosphate is removed.
The part of the enzyme into which the substrate fits is called the
active site
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?
active transport
Which is an example of potential energy rather than kinetic energy?
an apple made up of energy-rich macromolecules
Which of the areas shown in the figure below indicates the presence of an enzyme in the movement of reactant over to product?
c
Which one of the following molecules is able to move across the cell membrane by simple diffusion?
carbon dioxide
Probable factors that affect the passage of materials across cell membranes include all of the following except
color
Which of the following terms best describes entropy?
disorder
What process typically regulates the enzymes involved in metabolic reactions?
feedback inhibition
Which of the following is not a mechanism used to move materials in and out of the cell?
feedback inhibition
Simple diffusion of molecules occurs
in nonliving systems as well as living systems.
Energy of activation
is the energy required for molecules to react with each other.
When a cell is in a solution where the concentration of the solute is the same in the cell as in the solution, the solution is called
isotonic
In the setup shown in the figure below, which process allows the water to move across the membrane?
osmosis
A white blood cell surrounds and engulfs a worn-out red blood cell, forming a vesicle around the red blood cell. This process is called
phagocytosis.
The opposite of a turgid plant cell is a
plasmolyzed plant cell
What prevents a plant cell from bursting in a hypotonic solution?
the presence of a cell wall