Exam 2: Chemistry Comes Alive

With a family history of cardiovascular disease, which toast spread would be considered the most "heart healthy"?

You notice that you cannot read your book through a test tube of patient fluid held against the print, making it so blurred as to be unreadable. There is no precipitant in the bottom of the beaker, though it has been sitting for several days in a rack. What type of liquid is this?

A high fever causes an enzyme to lose its three-dimensional structure and function. Which bonds are broken when a protein denatures?

What properties does water have that make it a very versatile fluid?

Which of the following is an example of a suspension?

A chemical bond never occurs between components of a mixture. Discuss this.

A charged particle is generally called an ion or electrolyte.

The four elements that make up about 96% of body weight are___________ .

Brenda is a 26-year-old female who is being discharged from the hospital after a vaginal delivery of an 8-pound healthy infant. Brenda is instructed by the nurse to eat a diet high in fiber and to drink 8 glasses of water per day to prevent constipation. Explain the role of fiber and water to promote defecation.

___________is fat soluble, produced in the skin on exposure to UV radiation, and necessary for normal bone growth and function.

An acid with a pH of 6 has__________ hydrogen ions than pure water.

Which of the following does NOT describe enzymes?

A dipeptide can be broken into two amino acids by dehydration synthesis.

In general, the lipids that we refer to as oils at room temperature have ___________ .

Which of the following is NOT considered a factor in influencing a reaction rate?

Explain why water is considered to have partial charges even though it is sharing electrons in a polar covalent bond.

The lower the pH, the higher the hydrogen ion concentration.

When frying an egg, the protein albumin denatures and maintains only its__________ structure.

The genetic information is coded in DNA by the __________.

A 65-year-old patient came to the emergency room with complaints of severe heartburn unrelieved by taking a "large handful" of antacids. Would you expect the pH to be high or low? Explain why.