Ch 5 clicker questions

In order to start an exergonic reaction, a certain amount of energy must be absorbed by the reactants. This is called the energy of activation. Which of the following represents the energy of activation without enzymes?

A

Left side lower concentration of solute. Right side higher concentration of solute. What can you do to level them?

Add more solute to the left side

Which of the following represents the energy of activation as modified by an enzyme?

B

This graph illustrates how an enzyme catalyzes a reaction in a biological system. From an energy standpoint, is this reaction endergonic or exergonic?

Exergonic

Enzymes catalyze the many reactions in a cell. There are hundreds of different enzymes in a cell- each with a unique three dimensional shape. Why do cells have so many different enzymes?

The shape of an enzyme's active site generally fits a specific substrate

Membranes organize cell activities. The proteins embedded in the membranes are essential to their function. Those membrane proteins have properties that allow them to float in the membrane. What describes those properties?

The surface region of the protein in the interior of the membrane is mostly hydrophobic