biology chapter 5 quiz

movement of molecules from high concentration to low concentration a. diffusion b. facilitated diffusion c. osmosis d. active transport

a. diffusion

Cells exposed to a hypertonic solution will cause the plasma membrane to pull away from the cell wall as the vacuole loses water. a. true b. false

a. true

___________ is the amount of energy stored in a molecule a. heat b. calorie c. entropy d. ATP

b. calorie

Which of the following terms best describes entropy? a. order b. disorder c. potential energy d. kinetic energy e. energy conversions

b. disorder

entropy is a term used to indicated the relative amount of... a. organization b. disorganization c. enzyme action d. none of the above

b. disorganization

uses a membrane protein a. diffusion b. facilitated diffusion c. osmosis d. active transport

b. facilitated diffusion

the activation site of an enzyme... a. is identical in structure for all enzymes b. is the part of the enzyme where its substrate can fit c. can be used only once d. is not affected by environmental factor, such as pH and temperature

b. is the part of the enzyme where its substrate can fit

Which of the following is true regarding diffusion? a. molecules move from an area of lower concentration to higher concentration b. molecules move from an area of higher concentration to lower concentration c. it requires energy d. it requires transport proteins

b. molecules move from an area of higher concentration to lower concentration

enzymes catalyze reactions by... a. bringing the reactants together, so that they can bind b. lowering the activation energy c. both a and b are correct d. neither a nor b is correct

c. both a and b are correct

Enzymes work to accelerate chemical reactions by... a. releasing protons b. neutralizing the chemicals c. lowering the energy needed for activation d. increasing the energy needed for activation

c. lowering the energy needed for activation

movement of water across a membrane a. diffusion b. facilitated diffusion c. osmosis d. active transport

c. osmosis

a coated pit is associated with... a. simple diffusion b. osmosis c. receptor-medicated endocytosis d. pinocytosis

c. receptor-medicated endocytosis

in the induced fit model of enzyme catalysis... a. the substrate exactly fits multiple enzymes b. many substrates fit every enzyme c. the enzyme changes shape slightly to accommodate the substrate. d. the enzyme doesn't fit the substrate until it is induced by another substrate

c. the enzyme changes shape slightly to accommodate the substrate.

identify the incorrect statement a. when ATP becomes ADP + P, the amount of energy released is enough for a biological purpose b. the structure of ATP allows its breakdown to be easily coupled c. ATP can be easily recycled d. ATP consists of an adenine, a sugar, and two phosphates

d. ATP consists of an adenine, a sugar, and two phosphates

In the ATP/ADP cycle... a. a small amount of energy is needed to link phosphate to ADP to make ATP. b. When ATP becomes ADP, the amount of energy released is usually just enough for a biological purpose c. converting ADP into ATP is an energy-requiring reaction, whereas converting ATP into ADP is an energy-yielding reaction. d. All of the Above

d. All of the Above

requires energy input a. diffusion b. facilitated diffusion c. osmosis d. active transport

d. active transport

ATP is a good source of energy for a cell because... a. it is versatile- it can be used in many types of reactions b. its breakdown is easily coupled with energy-requiring reactions c. it provides just the right amount of energy for cellular reactions d. all of these are correct

d. all of these are correct

seawater is ______________ to blood because it contains a(n) __________concentration of solutes a. isotonic, higher b. hypotonic, higher c. isotonic, equal d. hypertonic, higher

d. hypertonic, higher

which of the following is not a fundamental law of energy? a. energy cannot be created or destroyed b. energy can be changed from one form to another c. energy is lost when it is converted from one form to another d. potential energy cannot be converted to kinetic energy

d. potential energy cannot be converted to kinetic energy

the movement of water across the plasma membrane of a cell is facilitated by... a. aquaporins b. substrate-medicated endocytosis c. receptor-medicated diffusion d. channel proteins e. both a and d are correct

e. both a and d are correct