Exam 2: The Chemical Basis of Life

An unknown molecule was detected in a tissue sample. The molecule is composed of carbon, hydrogen, and oxygen; appears to be a branching polymer; and is hydrophilic. This molecule is most likely a ________.

The term mass describes the material that makes up all living and nonliving things.

Which of the following statements accurately describes lipids?

Phospholipids have a hydrophilic end which is

Sodium chloride is considered a/an ________.

-The sodium chloride molecule breaks apart in water. What does "D" represent?

-Phospholipids are important components of the plasma membrane. What does "A" represent on the diagram?

An example of a fat-soluble vitamin is

The hydrogen and oxygen atoms in a molecule of water are held together by ________ bonds.

Identify the material that would NOT be considered an important inorganic substances in our bodies.

-The sodium chloride molecule breaks apart in water. What does "A" represent?

What is the building block molecule of a protein?

To which of the following organic groups does hemoglobin belong?

In a reversible reaction, when the rate of product formation is equal to the rate of reactant formation, the reaction is

An anion is

Sucrose is formed when the simple sugars fructose and glucose are covalently bonded. This reaction releases water. What type of reaction is this?

If water accumulates between two sheets of glass, it is very difficult to separate them. Which of the following explanations best explains this situation?

Hyperventilation causes the loss of large amounts of CO₂ from the body, decreasing the amount of H⁺ in solution. As a result,

Nucleotides

An individual hydrogen bond in a sample of water would be described as