Exam 3: Chemistry

Which solution would have the lowest concentration of hydrogen ions?

What happens to a protein that is exposed to acidic conditions?

Much of the digestive system relies on the activity of enzymes. The stomach secretions include an enzyme (pepsin)along with HCl to reduce the pH in the stomach to a pH of 2. When the food moves into the small intestine, there are multiple secretions to raise the pH to 7. How would this pH change affect the activity of the stomach enzyme, pepsin?

If a protein denature, then ________.

A solution with a pH of 13 is called ________.

An enzyme is a ________.

In a mixture of salt water, the salt is called the ________.

As we exercise, our body produces heat through the process of cellular respiration. Although our body temperature does increase, the temperature change is slow and we are able to maintain a homeostatic temperature. Which property of water explains why our body temperature is slow to change?

Which level of organization is represented by an α-helix or β-pleated sheet?

Which is an example of surface tension?

What happens to lactose when mixed with lactase?

What part of the atom is most critical for creating chemical bonds?

What are the building blocks of carbohydrates?

The action of many prescription drugs is to block the effects of enzymes by competitive inhibition. Explain what this means to your patient who is taking one of the drugs.

To expand our lungs, pleural fluid is secreted into the pleural cavity and allows the lungs to "stick to" the inside of the cavity. When the muscles contract, the cavity expands, pulling our lungs open so that we can bring air into the lungs. Which property of water is used to expand our lungs?

Which of these can release hydroxide ions?

When is hydrolysis used?

Dehydration synthesis is ________.

Glycogen is a ________.

Water is called ________ because most molecules will dissolve in it.