Exam 2: The Chemistry of Life

What is the basic structure of most lipids?

The difference in pH units between two acidic solutions is three.How much more acidic is the stronger acid than the weaker acid?

Which polysaccharide consists of individual long,twisted,unbranched chains of glucose?

The functional group -NH₂ is called the ________ group.

Select the most complete explanation of what the pH scale actually measures.

What will be accomplished by lowering the activation energy of a reaction?

The electronegativity of an atom is determined by how strongly outermost electrons are pulled toward the nucleus.Somewhat like gravity,the electronegativity will be stronger in atoms with larger nuclei and closer outermost electrons.Which element has the strongest electronegativity?

Which of the three gasses is the easiest to break apart,nitrogen gas (N₂),oxygen gas (O₂),or hydrogen gas (H₂)? Which is the most difficult to break apart? What accounts for the differences?

The majority of the elements essential to life are found in what part of the periodic table?

If you remove all of the functional groups from an organic molecule such that it contains only carbon and hydrogen atoms,the molecule is called ________.

Based on the suffix,a molecule of "maltose" is most likely what type of macromolecule?

What is a trace element?

What is another name for the polymers of carbohydrates?

Which polysaccharide consists of many long straight chains of glucose with bonds joining the chains?

Water is the lightest (least dense)when it ________.

Organic molecules that end in the suffix "-ase" often function as ________ molecules.

How do buffers minimize change in the pH of biological systems?

Which would have the highest concentration of C-H bonds?

The breaking of a large organic molecule into smaller individual subunits involves multiple ________.

The chemical name for table salt is sodium chloride,or simply NaCl.What type of chemical is NaCl?