Chapter 5 (Cell)

Which of the following is correct regarding the laws of energy Energy cannot be created or destroyed. Energy can be changed from one form to another. Energy is lost as heat when it is converted from one form to another. All of these are correct.

All

Identify the incorrect statement: When ATP becomes ADP + (P), the amount of energy released is enough for a biological purpose. The structure of ATP allows its breakdown to be easily coupled. ATP can be easily recycled. ATP consists of an adenine, a sugar, and two phosphates.

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

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

All

A coated pit is associated with

receptor-mediated endocytosis

In the induced fit model of enzyme action

the enzyme changes shape slightly to accommodate the substrate.

The term entropy refers to

the relative amount of disorganization in a system

Enzymes catalyze reactions by bringing the reactants together, so that they can bind. lowering the activation energy. Both a and b are correct. Neither a nor b is correct.

Both

The movement of water across the plasma membrane of a cell is facilitated by Aquaporins. Substrate-mediated endocytosis. Receptor-mediated diffusion. Channel proteins. Both a and d are correct.

Both

_______ is the movement of water across a semipermeable membrane from an area of higher concentration to an area of lesser concentration

Osmosis

Requires energy input.

active transport

Which of the following is not a feature of enzymes a. They drive reactions in a forward direction. b. They bind to a substrate during a reaction. c. Metabolic reactions destroy the enzyme molecules. d. They speed up reaction time.

c

The amount of energy needed to raise one gram of water one degree Celsius is called

calorie

In a/an _______ reaction, one reaction releases energy and the second uses energy

coupled

Movement of molecules from an area of high concentration to an area of low concentration.

diffusion

Entropy is a term used to indicate the relative amount of

disorganization

The term phagocytosis refers to a type of

endocytosis

Movement of water across a membrane

facilitated diffusion, active transport

Seawater is _____________ to blood because it contains a(n) _____________ concentration of solutes

hypertonic, higher

The active site of an enzyme

is the part of the enzyme where its substrate can fit