Exam 6: Energy Flow in the Life of a Cell

In cells, endergonic reactions are often coupled with exergonic reactions that store energy.

The energy of movement is referred to as________ energy, and stored energy is referred to as________ energy.

Which of the following does NOT have much potential energy?

Normally, a certain enzyme has maximum activity at 37°C, but once it has been heated to 100°C and then cooled back down to 37°C, the enzyme is no longer active. Why?

The enzyme phosphoglucoisomerase catalyzes the conversion of glucose -6-phosphate to fructose-6-phosphate. The region on phosphoglucoisomerase where glucose-6-phosphate binds is called the ________.

The metabolism of a cell is the sum of all of its chemical reactions.

The burning of sugar is an example of an endergonic reaction, and photosynthesis is an example of an exergonic reaction.

A ʺhigh-energyʺ bond in an ATP molecule is located between

In exergonic chemical reactions,

Imagine that you are conducting an experiment on a yeast enzyme known as sucrase. This enzyme is used by yeast cells to break down the disaccharide sucrose into the monosaccharides glucose and fructose. What type of reaction is this?

Briefly describe how ATP acts as an energy carrier in cells.

AMP stores energy in its chemical bonds and is able to use that energy for work in the cell.

Briefly explain the two laws of thermodynamics.

Why is photosynthesis a coupled reaction?

Competitive and noncompetitive enzyme inhibitors differ with respect to

ATP is considered a short-term form of energy for the cell, whereas ________or________represent more stable, long-term energy stores.

When, if ever, do molecules stop moving?

The law of conservation of energy states that although the form of energy used remains the same, the total amount of energy changes.

All of the following statements about catalysts are true EXCEPT

Sitting at the top of a slide, a child has ________energy; sliding down, she is using________energy.