Exam 2: Chemistry Comes Alive

An amino acid may act as a proton acceptor or donor. Explain.

How many phosphates would ADP have attached to it?

Select which reactions will usually be irreversible regarding chemical equilibrium in human bodies.

In a DNA molecule, the phosphate serves__________ .

Mixtures are combinations of elements or compounds that are physically blended together but are not bound by chemical bonds.

What advantages does ATP have in being the energy currency molecule?

How can phospholipids form a film when mixed in water?

The chemical symbol O=O means ___________ .

Starch is the stored carbohydrate in plants, while__________ is the stored carbohydrate in animals.

What is the major difference between polar and nonpolar covalent bonds?

An atom with 3 electrons in its outermost (valence) shell may have a total of __________electrons altogether.

What is a chain of more than 50 amino acids called?

Which of the following is a general function for a fibrous protein?

What does the formula C₆H1₂O₆ mean?

A 22-year-old female college student is stressed out due to final exams and begins to hyperventilate. This means she is exhaling too much carbon dioxide. As a result, the pH of the blood will become too basic creating a homeostatic imbalance. Her friend hands her a paper bag and instructs her to inhale and exhale into the bag. Breathing in the bag helps to replace the lost carbon dioxide lowering the pH back to normal levels. Which buffer system in the body will be involved in this reaction?

What type of chemical bond can form between an atom with 11 protons and an atom with 17 protons?

All chemical reactions are theoretically reversible. Comment on this statement.

Explain the difference between potential and kinetic energy.

A chemical reaction in which bonds are created is usually associated with__________ .

An atom with an atomic number of 10 and a mass number of 24 would have ___________.